BY
SIBONGILE ZIMBA
(Lecturer in Vegetable crops)
Bunda College (LUANAR)- Malawi
1
SUBSTRATE AND GENOTYPE EFFECTS ON GROWTH...
OUTLINE OF THE PRESENTATION
Introduction
Background
Problem statement
Study justification
Materials and methods
Results an...
BACKGROUND
Importance of potato
Food and nutrition
Income generating
Industrial use
Production status
World: 325 million t...
PROBLEM STATEMENT AND JUSTIFICATION
Substrate and
genotype
are
important
factors for
minituber
production
4
Due to limited...
MAIN OBJECTIVE
To evaluate the effect of substrate (potting media) and genotype
on growth and seed yield performance of po...
MATERIALS AND METHODS
6
Treatments
1. Genotype
• Lady Rosetta
• Van der plank
• Up to date
• Buffelspoort
• Bp 1. 2007
• R...
PLANTING
Volume of the tray was 0.028m3
Volume of the media in a
tray was 0.015m3
Plantlets were planted at
10cm apart.
Th...
TABLE 1. PLANT VIGOUR PER SUBSTRATE TYPE & GENOTYPE 7 WEEKS AFTER
TRANSPLANTING
Genotypes Substrate
Sand Vermiculite Sawdu...
9Vermiculite River sand Saw dust
Figure 1: Bp 1 2007 plants at 5 weeks after transplanting in green house
TABLE 2. NUMBER OF TUBERS PER PLANT PER SUBSTRATE TYPE AND GENOTYPE AT HARVEST
Genotypes Substrate
Sand Vermiculite Sawdus...
TABLE 3. YIELD (G/M2) PER SUBSTRATE TYPE AND GENOTYPE AT HARVEST
Genotype Substrate
Sand Vermiculite Sawdust Mean
Magalaba...
CONCLUSION
Vermiculite remained superior to other substrate types
followed by river sand.
This was demonstrated by having ...
RECOMMENDATION
Lady Rosetta, Bp 1. 2007, Up to date can be
recommended for optimal minituber production.
Future study to l...
STUDY LIMITATION
Knowledge on nutrition management for optimal minituber
production in green house
Acknowledgement
Supervi...
15
THANK YOU
(zikomo kwambiri)
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Sess07 1 zimba, s. substrate and genotype effects on growth and mini tuber yield for seed potato production in malawi

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Sess07 1 zimba, s. substrate and genotype effects on growth and mini tuber yield for seed potato production in malawi

  1. 1. BY SIBONGILE ZIMBA (Lecturer in Vegetable crops) Bunda College (LUANAR)- Malawi 1 SUBSTRATE AND GENOTYPE EFFECTS ON GROWTH AND MINI TUBER YIELD FOR SEED POTATO PRODUCTION IN MALAWI
  2. 2. OUTLINE OF THE PRESENTATION Introduction Background Problem statement Study justification Materials and methods Results and discussion Conclusion Recommendation Acknowledgement 2
  3. 3. BACKGROUND Importance of potato Food and nutrition Income generating Industrial use Production status World: 325 million tonnes/year Africa: 16.7 million tonnes/year Malawi: 2.2 million tonnes/year yield of 11.9 tonnes/ha (FAO, 2009) 3
  4. 4. PROBLEM STATEMENT AND JUSTIFICATION Substrate and genotype are important factors for minituber production 4 Due to limited multiplication programme Potato farmers Lack healthy and quality seed potato There is a need to develop a system Micropropagation offers a feasible propagation technique There are many factors that affect the production in greenhouse
  5. 5. MAIN OBJECTIVE To evaluate the effect of substrate (potting media) and genotype on growth and seed yield performance of potato in order to optimize clean seed potato production. 5
  6. 6. MATERIALS AND METHODS 6 Treatments 1. Genotype • Lady Rosetta • Van der plank • Up to date • Buffelspoort • Bp 1. 2007 • Rosita • Magalabada 2. Substrate Vermiculite Saw dust River sand Experimental site • Green house at Bunda Experimental Duration • April – October 2011 Vermiculite Saw dust River sand
  7. 7. PLANTING Volume of the tray was 0.028m3 Volume of the media in a tray was 0.015m3 Plantlets were planted at 10cm apart. The tray contained 40 plants Irrigation and fertiliser (Alsadon and Knutson, 1994) Data collected: Survival percent Plant height and vigour Mini tuber yield Data analysis in Genstat version 13 7
  8. 8. TABLE 1. PLANT VIGOUR PER SUBSTRATE TYPE & GENOTYPE 7 WEEKS AFTER TRANSPLANTING Genotypes Substrate Sand Vermiculite Sawdust Mean Magalabada 1.00±0.01h 2.00±0.00f 1.00±0.00i 1.33f Rosita 1.00±0.33h 3.00±1.60d 1.07±1.67i 1.72e Lady Rosetta 2.83±0.17f 4.83±0.13b 1.17±1.17i 2.94b Bp 1. 2007 2.00±0.00g 4.67±0.33b 1.00±0.00i 2.55c Up to date 1.80±0.17g 3.33±1.60c 1.00±0.00i 2.04d Van der plank 2.67±0.33de 4.67±0.33a 2.00±0.00i 3.11a Buffelspoort 1.00±0.00h 2.33±0.67ef 2.00±0.00i 1.78ef Mean 1.76b 3.55a 1.33c CV% 3.7% P-value S=0.001 G=0.001 S*G=0.001 LSD0.05 S*G=0.319 Genotype=0.18 Substrate=0.13 8 Values in the table are presented as mean ± standard error Means in the main effects have been compared separately
  9. 9. 9Vermiculite River sand Saw dust Figure 1: Bp 1 2007 plants at 5 weeks after transplanting in green house
  10. 10. TABLE 2. NUMBER OF TUBERS PER PLANT PER SUBSTRATE TYPE AND GENOTYPE AT HARVEST Genotypes Substrate Sand Vermiculite Sawdust Mean Magalabada 5±0.33fgh 8±0.00cd 2±0.00j 5.02c Rosita 5±0.78fgh 9±0.08bc 2±0.33j 5.32bc Lady Rosetta 6±0.17e 10±0.79b 3±0.44ij 6.13b Bp1. 2007 4±0.22gh 6±0.29ef 3±1.33hi 4.59c Up to date 7±0.29de 12±0.77a 3±0.68ij 6.99a Van der plank 3±0.22ij 4±0.11hi 2±0.15j 2.76d Buffelspoort 5±0.21efg 7±0.17de 2±0.47j 4.60c Mean 4.94b 7.81a 2.39c CV% 17.1% P-value S=0.001 G=0.001 S*G=0.001 LSD0.05 Substrate=0. 564 Genotype=0.86 S*G=1.492 10 Values in the table are presented as mean ± standard error Means in the main effects have been compared separately
  11. 11. TABLE 3. YIELD (G/M2) PER SUBSTRATE TYPE AND GENOTYPE AT HARVEST Genotype Substrate Sand Vermiculite Sawdust Mean Magalabada 954f 1059d 259i 757d Rosita 962f 1490b 262i 904c Lady Rosetta 640g 2146a 244i 1010b Bp 1 2007 1136e 2140a 431h 1238a Up to date 643g 2012a 291hi 982bc Van der plank 708g 1263c 318hi 779d Buffelspoort 700g 1364bc 240i 770d Mean 820b 1740a 292c CV% 9.1% P-value S=0.001 G=0.001 S*G=0.001 LSD 0.05 S=54.4 G=83.1 S*G=143.9 11 Means in the main effects have been compared separately
  12. 12. CONCLUSION Vermiculite remained superior to other substrate types followed by river sand. This was demonstrated by having good plant stand in trays with vermiculite than other media which subsequently influenced yields. Introduced genotypes grew vigorously and yielded more per unit area than the local genotypes. 12
  13. 13. RECOMMENDATION Lady Rosetta, Bp 1. 2007, Up to date can be recommended for optimal minituber production. Future study to look into different greenhouse substrate combinations and locally available material for optimising minituber production. Future study to look into Cost benefit analysis of different substrates. 13
  14. 14. STUDY LIMITATION Knowledge on nutrition management for optimal minituber production in green house Acknowledgement Supervisory team ARDEP ARC-South Africa APA 14
  15. 15. 15 THANK YOU (zikomo kwambiri)

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