Presentation at the November 2012 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Arusha, Tanzania.
Please see www.b4fa.org for more information
The pineapple is a tropical and subtropical fruit .
Pineapple (Ananas comosus) is one of the commercially important fruit crops of India.
Total annual world production is estimated at 14.6 MT of fruits.
India is the fifth largest producer of pineapple with an annual output of about 1.2 MT.
common throughout the Bromeliaceae but Ananus is typically diploid (2n=2X=50)while pseudananas is tetraploid (2n=4X=100).Some triplod genotype with 2n=3x=75(e.g. Cayenne BR59,Spanish GU75-2 and DOS indios BR47)have also reported to exist.
Other leading producers are Thailand, Philippines, Brazil, China, Nigeria, Mexico, Indonesia, Colombia and USA.Cultivation of pineapple originated in Brazil.
“Advances in breeding of aonla ”
“Advances in breeding of aonla , breeding method of aonla ppt, new breeding method of aonla by gangaram rana, “Advances in breeding of aonla igkv , mutation breeding of aonla
The pineapple is a tropical and subtropical fruit .
Pineapple (Ananas comosus) is one of the commercially important fruit crops of India.
Total annual world production is estimated at 14.6 MT of fruits.
India is the fifth largest producer of pineapple with an annual output of about 1.2 MT.
common throughout the Bromeliaceae but Ananus is typically diploid (2n=2X=50)while pseudananas is tetraploid (2n=4X=100).Some triplod genotype with 2n=3x=75(e.g. Cayenne BR59,Spanish GU75-2 and DOS indios BR47)have also reported to exist.
Other leading producers are Thailand, Philippines, Brazil, China, Nigeria, Mexico, Indonesia, Colombia and USA.Cultivation of pineapple originated in Brazil.
“Advances in breeding of aonla ”
“Advances in breeding of aonla , breeding method of aonla ppt, new breeding method of aonla by gangaram rana, “Advances in breeding of aonla igkv , mutation breeding of aonla
There is a huge demand for Mango worldwide. Hence, exporting to other countries we earn foreign currency. And, especially in Bangladesh, the suitable climate and soil condition is a positive sign of Mango cultivation. With the help of cut-edged technology here is a possibility of increased production.
“Advances in breeding of grapes ”
Advances breeding of Grape, breeding of grape, mutation breeding of grape, biotechnology breeding of grape ppt, breeding of grape by gangaram rana, Advances breeding of Grape in igkv ,
“Advances in breeding of banana ”
Advances breeding of Banana, breeding of banana , breeding of banana by gangaram rana, Advances breeding of Banana igkv, mutation breeding of banana, biotechnology of banana, seed production breeding of banana,
importance of production of cashew. it includes about botany, all varities. cotains all cimatic and soil requirement of the crop. also contais different methods of propogation, cultivation ascpects and processig aspects.
There is a huge demand for Mango worldwide. Hence, exporting to other countries we earn foreign currency. And, especially in Bangladesh, the suitable climate and soil condition is a positive sign of Mango cultivation. With the help of cut-edged technology here is a possibility of increased production.
“Advances in breeding of grapes ”
Advances breeding of Grape, breeding of grape, mutation breeding of grape, biotechnology breeding of grape ppt, breeding of grape by gangaram rana, Advances breeding of Grape in igkv ,
“Advances in breeding of banana ”
Advances breeding of Banana, breeding of banana , breeding of banana by gangaram rana, Advances breeding of Banana igkv, mutation breeding of banana, biotechnology of banana, seed production breeding of banana,
importance of production of cashew. it includes about botany, all varities. cotains all cimatic and soil requirement of the crop. also contais different methods of propogation, cultivation ascpects and processig aspects.
Snap bean breeding in eastern africa ppt. presented by Oduor Kenneth Tembe. U...Kenneth Tembe
In the recent past, Snap bean has been an important crop in ensuring food security and economic stability.Research towards improving the crop is therefore timely.
Country Status Reports on Underutilized Crops by Savenaca Cuquma, Fijiapaari
Country Status Reports on Underutilized Crops by Savenaca Cuquma, Fiji - Regional Expert Consultation on Underutilized Crops for Food and Nutritional Security in Asia and the Pacific November 13-15, 2017, Bangkok
Cowpea is the second most important legume crop in tropical Africa.
About 80% of the world’s production is in Africa with Nigeria being the leading producer.
Cowpea is an important food for humans and provides feed, forage, hay and silage for livestock and green manure and cover crops.
The dry seeds may be ground into meal or flour which is used in a number of ways.
The fresh seeds and immature pods are eaten as vegetables. The young shoots and leaves are eaten as spinach.
Presentation at the November 2012 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Arusha, Tanzania.
Please see www.sti4d.com/b4fa for more information
B4FA 2012 Tanzania: Science Journalism in Tanzania - Joseph Kithamab4fa
Presentation at the November 2012 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Arusha, Tanzania.
Please see www.sti4d.com/b4fa for more information
B4FA 2012 Tanzania: Genes - Out of the Lab into the News - Sharon Schmickleb4fa
Presentation at the November 2012 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Arusha, Tanzania.
Please see www.sti4d.com/b4fa for more information
Presentation at the November 2012 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Arusha, Tanzania.
Please see www.sti4d.com/b4fa for more information
B4FA 2013 Ghana: Seed trade environment in Ghana - Daniel Otungeb4fa
Presentation at the March 2013 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Accra, Ghana.
Please see www.sti4d.com/b4fa for more information
B4FA 2013 Ghana: Agricultural biotechnology and the regulatory environment - ...b4fa
Presentation at the March 2013 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Accra, Ghana.
Please see www.sti4d.com/b4fa for more information
Presentation at the March 2013 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Accra, Ghana.
Please see www.sti4d.com/b4fa for more information
B4FA 2013 Ghana: Cassava mosaic disease resistance - Paul Asareb4fa
Presentation at the March 2013 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Accra, Ghana.
Please see www.sti4d.com/b4fa for more information
B4FA 2013 Ghana: Bt cotton production in Ghana - Emmanuel Chambab4fa
Presentation at the March 2013 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Accra, Ghana.
Please see www.sti4d.com/b4fa for more information
B4FA 2013 Ghana: F1 hybrid seeds and plants - Claudia Canalesb4fa
Presentation at the March 2013 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Accra, Ghana.
Please see www.sti4d.com/b4fa for more information
Presentation at the March 2013 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Accra, Ghana.
Please see www.sti4d.com/b4fa for more information
B4FA 2013 Ghana: Status of maruca-resistant cowpea project in Ghana - IDK Ato...b4fa
Presentation at the March 2013 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Accra, Ghana.
Please see www.b4fa.org for more information
B4FA 2013 Ghana: Genetic Engineering - Chris Leaverb4fa
Introduction to genetic engineering technologies and principles at B4FA 2013 Accra media fellowship workshop
For more information please see www.b4fa.org
B4FA 2012 Tanzania: Seed trade environment in Tanzania - Daniel Otungeb4fa
Presentation at the November 2012 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Arusha, Tanzania.
Please see www.b4fa.org for more information
B4FA 2012 Tanzania: Groundnut aflatoxin project ARI - Omari Mpondab4fa
Presentation at the November 2012 dialogue workshop of the Biosciences for Farming in Africa media fellowship programme in Arusha, Tanzania.
Please see www.b4fa.org for more information
The increased availability of biomedical data, particularly in the public domain, offers the opportunity to better understand human health and to develop effective therapeutics for a wide range of unmet medical needs. However, data scientists remain stymied by the fact that data remain hard to find and to productively reuse because data and their metadata i) are wholly inaccessible, ii) are in non-standard or incompatible representations, iii) do not conform to community standards, and iv) have unclear or highly restricted terms and conditions that preclude legitimate reuse. These limitations require a rethink on data can be made machine and AI-ready - the key motivation behind the FAIR Guiding Principles. Concurrently, while recent efforts have explored the use of deep learning to fuse disparate data into predictive models for a wide range of biomedical applications, these models often fail even when the correct answer is already known, and fail to explain individual predictions in terms that data scientists can appreciate. These limitations suggest that new methods to produce practical artificial intelligence are still needed.
In this talk, I will discuss our work in (1) building an integrative knowledge infrastructure to prepare FAIR and "AI-ready" data and services along with (2) neurosymbolic AI methods to improve the quality of predictions and to generate plausible explanations. Attention is given to standards, platforms, and methods to wrangle knowledge into simple, but effective semantic and latent representations, and to make these available into standards-compliant and discoverable interfaces that can be used in model building, validation, and explanation. Our work, and those of others in the field, creates a baseline for building trustworthy and easy to deploy AI models in biomedicine.
Bio
Dr. Michel Dumontier is the Distinguished Professor of Data Science at Maastricht University, founder and executive director of the Institute of Data Science, and co-founder of the FAIR (Findable, Accessible, Interoperable and Reusable) data principles. His research explores socio-technological approaches for responsible discovery science, which includes collaborative multi-modal knowledge graphs, privacy-preserving distributed data mining, and AI methods for drug discovery and personalized medicine. His work is supported through the Dutch National Research Agenda, the Netherlands Organisation for Scientific Research, Horizon Europe, the European Open Science Cloud, the US National Institutes of Health, and a Marie-Curie Innovative Training Network. He is the editor-in-chief for the journal Data Science and is internationally recognized for his contributions in bioinformatics, biomedical informatics, and semantic technologies including ontologies and linked data.
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
(May 29th, 2024) Advancements in Intravital Microscopy- Insights for Preclini...Scintica Instrumentation
Intravital microscopy (IVM) is a powerful tool utilized to study cellular behavior over time and space in vivo. Much of our understanding of cell biology has been accomplished using various in vitro and ex vivo methods; however, these studies do not necessarily reflect the natural dynamics of biological processes. Unlike traditional cell culture or fixed tissue imaging, IVM allows for the ultra-fast high-resolution imaging of cellular processes over time and space and were studied in its natural environment. Real-time visualization of biological processes in the context of an intact organism helps maintain physiological relevance and provide insights into the progression of disease, response to treatments or developmental processes.
In this webinar we give an overview of advanced applications of the IVM system in preclinical research. IVIM technology is a provider of all-in-one intravital microscopy systems and solutions optimized for in vivo imaging of live animal models at sub-micron resolution. The system’s unique features and user-friendly software enables researchers to probe fast dynamic biological processes such as immune cell tracking, cell-cell interaction as well as vascularization and tumor metastasis with exceptional detail. This webinar will also give an overview of IVM being utilized in drug development, offering a view into the intricate interaction between drugs/nanoparticles and tissues in vivo and allows for the evaluation of therapeutic intervention in a variety of tissues and organs. This interdisciplinary collaboration continues to drive the advancements of novel therapeutic strategies.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
This pdf is about the Schizophrenia.
For more details visit on YouTube; @SELF-EXPLANATORY;
https://www.youtube.com/channel/UCAiarMZDNhe1A3Rnpr_WkzA/videos
Thanks...!
3. • Mikocheni Agricultural Research Institute (MARI)
– MARI was established in March 1996 to sustain and
institutionalize coconut research and development activities
in Tanzania conducted by then National Coconut
Development Programme (NCDP)
4. Most important perennial oil crop in the
country
- > 265,000 ha along the coastal belt
- 3-4 nuts consumed per household
daily
- Supports >300,000 households
- Important agro-forestry crop
- Known as the “Tree of Life” due to
its multipurpose use
declining production that became more
apparent during the late 1960s and early
1970s
5. TREE OF LIFE USES – SOME EXAMPLES
Young fruit- coconut water
Toddy alcohol
Coconut milk
Ropes/mats
Furniture
carvings
6. Contd..
•
•
•
•
Coconut Meat :coco flour, desiccated coconut chips,
candies
Coconut Oil : soap, lard,, pomade, shampoo,
margarine, butter and cooking oil.
Coconut leaves: quality paper pulp, midrib brooms,
hats and mats, fruit trays, waste baskets, fans,, lamp
shades, placemats, bags and roofing materials.
Coconut roots: dyes, medicine
7.
8. 1. Drought due to low rainfall and bad distribution
140
35
Rainfall
Temp.
30
100
25
80
20
60
15
40
10
20
5
0
0
J
F
M
A
M
J
J
Month
Annual average rain fall =1100mm
A
S
O
N
D
Temp (deg. C)
Rainfall (mm)
120
9. 2. Lack of improved and adapted planting materials
10. 3. Poor crop husbandry practices
Use of fire bush to
control weeds
Poor farming
practice no soil
fertility
management
11. 4. Presence of serious pests
Aceria Mite attack on nuts
Coconut bug (mbu wa mnazi
Attack of nutlets
12. COCONUT BUG /mbu wa minazi
Damage
caused by
coconut bug
Coconut bug
14. 5. Presence of Lethal Disease - LD
• Pathogen: Phytoplasmas
– Transmitted by insects (leaf
hoppers)
Symptoms
• Yellowing of leaves
• Blackening of inflorescence
• Premature nut fall
• Death within 2-3 months
Dead leaves
17. • National Coconut Development Programme (NCDP) .
In 1979/80 was established by Government of the
United Republic of Tanzania to reverse the status of
declining productivity
• This document covers in work in breeding and
agronomy research activities from 1979 to 2004.
18. Background
major constraints to coconut production in Tanzania
• a lack of high yielding coconut varieties that are adapted to the prevailing local
conditions of drought and lethal disease.
– before establishment of National Coconut Development Programme some
work to breed for improved coconut varieties in Tanzania included:
• Selection of East African Tanzania (EAT) in Zanzibar and Chambezi Research
Station in 1930’s and 1960’s
• Investigation of general combining ability of EAT and Pemba Red Dwarf (PRD)
at Livestock Breeding station (LBS) in Tanga. EAT x PRD cross was found to
be the best.
– however, these efforts were not sustained. With the establishment of the
NCDP, a Seed Multiplication and Breeding Section was set up with the
objective to breed for higher yield, resistance to lethal disease and tolerance
to drought stress.
19. Main objective
to breed high yielding planting materials
that are resistant to lethal disease and
tolerant to drought or moisture stress.
20. Main activities
The main activities of the breeding section over the
past twenty-five years(1979/80-2004) were:
A. Germplasm maintenance, characterization and
evaluation.
B. Introduction of exotic germplasm to widen the
coconut genetic base.
C. Establishment of seed farms.
D. Improvement of EAT through selection.
E. Production and evaluation of breeder’s test materials
F. Embryo culture
21. A. Germplasm maintenance, characterization and evaluation
I.
Main coconut varieties grown in Tanzania: EAT & PRD
EAT
– EAT is a wild type similar to coconuts on the Indian sub-continent, have
thick-husked and slow germinating coconuts.
– EAT cross pollination, fruit wt 750-1450g, fruit is oval shaped with thick husk
shows differences in morphological traits like colour(red, yellow, green and
brown; but most of palms bear green or brown) fruits, size, and fruit shape;
– Nuts are oblong, thick shell
– 1st bearing comes 6-8 years after field planting.
– yield per year ranges between 40-80 nuts under rain fed conditions, higher
yields can be obtained under more favourable moisture regimes.
– The palm is relatively drought tolerant.
22. EAT contd.
• The palm can grow up to 30m tall.
• Crown shapes are variable, semi-circle or Circular. Peduncles are
long taking the fruit and petiole colour.
• The EAT has numerous sub-populations. Has a close
resemblance to the Mozambique Tall (MZT) and to some other
tall varieties from the Indian Ocean Islands such as Madagascar,
Comoros and Mauritius.
• The distinctive identity of EAT is the fruit shape and fruit
components is Figure 1.
23. Fig. 1 East African tall and fruits characteristics
24. II. Pemba Red Dwarf (PRD)
– local name of Kitamli suggesting it was introduced by the Tamil traders to
East Africa.
– PRD occurs everywhere along the Tanzanian and Kenyan coastal area,
also in Mozambique, Madagascar, Comoros and Mauritius under the same
name.
– PRD bears no bole, has a thin stem measuring 15cm in diameter at 20cm
above ground level, and 20 cm at 1 m above ground level. The stem is
narrow at the base and the diameter increases slightly as you go higher
towards the girth.
– Top leaves are erect and straight,
– Reproductive system is self pollinated.
– PRD produces medium size oval shaped fruits. The husk is thin and the
average fruit weight is 690g.
25. Description of PRD contd..
• PRD palms have a close resemblance to some varieties, such as
the Cameroon Red Dwarf from West Africa, the Papua New
Guinea Red Dwarf, or the King Coconut from Sri Lanka.
• The fruits are oval and fruit colour is golden. The bunch stalks
are long, holding the fruits of all ages at the same distance from
the stem.
• Molecular DNA studies have shown that the Pemba Red
Dwarf and the Cameroon Red Dwarf are closely related.
However, according to the observations made in Tanzania,
where the two varieties are available, PRD fronds do not droop
as those of CRD. Peduncles are longer than other red or yellow
dwarfs but shorter than those of CRD.
26. Description of PRD contd..
• The nut is oval in shape and weighs about 500g.
• Under favourable edaphic and climatic conditions, PRD is highly
precocious coming to first bearing in 2-3 years after field
planting. Produces 30-70 fruits/palm/year under rain fed
conditions.
• Mainly grown for its sweet and tasty liquid endosperm. The low
oil and sugar content in the solid endosperm makes it of low
importance in copra production. It is a very good ornamental
palm.
• PRD is sensitive to drought and this may be the reason that it is
mostly found around homesteads. Pemba Island (its primary
source in Eastern Africa) provides optimal growing conditions
for the dwarf in Tanzania.
28. Use of molecular markers in germplasm characterization
• One limitation of using morphological parameters for germplasm
characterization is that they are influenced by the environment.
• Through participation of institute in various projects research networks in
biotechnology. The coconut germplasm in Tanzania has been characterized
using molecular markers. The results are:• Validation of the genetic similarity of West African Tall (WAT) from Côte
d’Ivoire, Laccadive micro(LCM) from India and the EAT from the East
Coast of Africa.
• Confirmation of the Pemba Red Dwarf (PRD), collected from Pemba, is
more related to the Asia-Pacific coconuts.
• Collection s showed 2 clusters of local EAT sub-populations i.e., Bagamoyo
(central part of the coastal belt) and those from the southern districts of Lindi
and Mtwara regions and while the second one consisted of the subpopulations from the Tanga region only (northern part of the coastal belt)
29. B. Introduction of exotic germplasm to widen the coconut
genetic base.
• at beginning of the NCDP a survey wad done on existing coconut
genetic base results showed coconut genetic base in the country was
narrow.
• Based results, and that coconut breeding is a long-term (30yrs) and
costly activity, it was recommended to take advantage of technologies
developed in other countries.
• Importation of different genetic materials (dwarfs, talls and hybrids),
most of which came from Côte d’Ivoire. A total of 9 dwarfs, 14 talls
and 22 hybrids were imported
• Besides the imported germplasm, 30 EAT sub-populations and five
dwarfs were collected locally. The germplasm collection has been
established at Chambezi (Bagamoyo) and Kidichi (Zanzibar) 29 ha
30. C. Establishment of seed farms
• Long-term nature of coconut breeding, a decision was made at
the beginning of NCDP to adapt technologies that had been
developed else where in order to minimize costs and time
required for research. It was assumed that some of the
introduced hybrids would perform better than the local East
African Tall (EAT) coconut population.
• While the performance of these hybrids was being evaluated in
the field under Agronomy Section, seed farms for hybrid
production were also established in Mafia and Zanzibar islands.
These sites were selected because of their higher and better
rainfall pattern and absence of the lethal disease.
31. D. Chambezi EAT Improvement
• Between April 1991 and November 1992 a 54 ha EAT seed farm
was established at Chambezi Research Station seednuts for the
establishment came from six localities in Tanga Region: (, Vuo,
Boma, Mwambani, Boza and Madanga)
• these sub-populations chosen based on the history of planting
and the lethal disease, and early performance in disease resistance
trials where they expressed tolerance/resistance to LD and
associated with the longer history of coconut cultivation in areas
north of Pangani as compared to the southern part.
32. E. Production and Evaluation of Breeder’s Test Materials
(BTM)
• Introduced hybrids did not perform well under local conditions. Following
the disappointing performance, emphasis was put on EAT selection and
breeding for resistance to LD and drought tolerance. The strategy was to use
the survivors from the disease resistance trials in a cross breeding programme
and to test the general combining ability of the resulting crosses with respect
to yield, LD resistance and drought tolerance.
• BTMs were produced between 1991 and 1994 by controlled hand pollination
techniques. The basis of selecting the crossing partners was the percentage of
palms that had so far survived lethal disease at Kifumangao, Chambezi and
Pongwe where disease incidence is very high. In Zanzibar the main objective
was to impart the good characteristics (adaptability to local conditions) of
EAT by crossing EAT with other tall and dwarf varieties.
• The BTM trials were planted at Chambezi, Kifumangao which are Lethal
Disease (LD) infested areas), Mkuranga and Selem (LD-free) and in a number
of on-farm trials in Tanga, Dar es Salaam and Coast regions between 1992/93
and 1994/95 to evaluate their performance with respect to yield, resistance to
lethal disease and tolerance to drought.
33. Figure Status of Bearing and number of nut set /tree at Chambezi and
Mkuranga at 61
(MYD=Malayan Yellow Dwarf, MGD= Malayan Green Dwarf,
MRD=Malayan Red Dwarf,, CRD= Cameron Red Dwarf, PRD Pemba
Red Dwarf)
• 61months after planting
(MAP), the results showed
varieties performed differently
from each other with respect
bearing percentage and
number of nuts harvested at
Mkuranga and Chambezi
90
80
70
60
50
40
30
20
10
0
Chambezi
Mkuranga
MYDxEAT
PRDxEAT
Chambezi
MRDxEAT
MGDxEAT
Mkuranga
CRDxEAT
EAT exLBS
34. Disease incidences of EAT crosses
• All breeders’ test materials produced by crossing
survivors of Lethal Disease (LD) sustained heavy losses
to the disease
• at Kifumangao (93.7-100%)
• while at Chambezi losses were lower, ranging from
4.2% to 49.9 %.
• It can therefore be concluded that the strategy of
breeding for resistance to LD by screening and crossing
survivors of the disease with each other was not
successful, probably because the survivors were not
resistant but had rather escaped the disease
35. F. Coconut Embryo Culture
use of in-vitro techniques are one of the most appropriate
procedures for germplasm collection and exchange.
For this reason, MARI collaborated with other COGENT member
countries to evaluate different protocols used by different
institutions in coconut embryo culture procedures and
acclimatization with the view to improve the efficiency of in-vitro
culture of zygotic coconut embryos.
36. Agronomy research aimed at addressing agronomic
problems facing the coconut farmer by developing
improved and sustainable coconut based farming
systems that are appropriate for the small scale farmer
in Tanzania. The main activities included:
–
–
–
–
Variety trials
Intercropping and crop rotation trials;
Fertilizer trials;
Soil moisture conservation trials.
37. • To achieve this, extensive on-station and on-farm agronomy trials were
conducted in different agro-ecological zones to determine the effect of
fertilizer, spacing, intercropping, crop rotation, mulching and weeding
on the growth and yield of different coconut varieties.
– Experiments were carried out at seven sites representing major coconut
soils (Chambezi for coastal sands, Mkuranga for red brown sandy loams,
Maramba and Mlingano for red brown, Selem for white sands, Bambi for
red brown clay loam over limestone(Zanzibar) and Ng’apa in Lindifor
valley bottoms).
– Recommendations on improved crop husbandry practices were made and
disseminated to farmers through the extension services.
– the major conclusions and recommendations include
• Intercropping and crop rotation;
• Soil fertility (fertilizer rates recommendation for coconuts) ,
improvement and maintenance
• Soil moisture conservation techniques.
38. • Varieties: hybrid PB 121 and EAT other hybrids were
represented at the sites.
The varieties were planted at a space of 9m x 9m triangular (143 trees/ha)
The following vegetative and reproductive measurements were made:
rate of leaf production, Flowering /precocity, nut set, yield.
43. Variety trials I: Yield and drought effects contd.
Yield comparison of varieties at
different dates
Drought effects (% of palms with wilting
symptoms/plot) at different dates
44. F1 hybrid at 4.5yrs after planting
Drought affected palms