This presentation by Susan Schoenian is the first from a five-part webinar series on "Breeding Better Sheep & Goats." The topic of this presentation is "Genetics 101."
This PowerPoint presentation is from the third webinar in a five part series on Breeding Better Sheep & Goats. The presenter is Susan Schoenian, University of Maryland Extension Sheep & Goat Specialist.
Basis of selection in animal genetics and breeding Dr. Jayesh Vyas
The sources of information based on which the breeding value of the individual is estimated are called as the basis of selection or aids to selection or criteria of selection which are the basis of estimating the breeding value.
The breeding value so obtained is known as estimating breeding value(EBV)or probable breeding value(PBV).
The different selection criteria to estimates the B.V. of an individuals for single trait
This PowerPoint presentation is from the third webinar in a five part series on Breeding Better Sheep & Goats. The presenter is Susan Schoenian, University of Maryland Extension Sheep & Goat Specialist.
Basis of selection in animal genetics and breeding Dr. Jayesh Vyas
The sources of information based on which the breeding value of the individual is estimated are called as the basis of selection or aids to selection or criteria of selection which are the basis of estimating the breeding value.
The breeding value so obtained is known as estimating breeding value(EBV)or probable breeding value(PBV).
The different selection criteria to estimates the B.V. of an individuals for single trait
Presented by Raphael Mrode, ILRI, at the workshop on Essential Knowledge for Effective Improvement and Dissemination of Genetics in Sheep and Goats, Addis Ababa, Ethiopia, 3–5 November 2020
Major economic traits of cattle and buffalopratee5
Selection and judging of the breeding stocks are the first and foremost steps to start with any breeding programme. For this, a no. of phenotypic and behavioral traits are taken into consideration. Breeding plans for cattle and buffalo should aim to meet the quantitative and qualitative demands of milk and meat in the country. From a practical standpoint, traits with a measurable or at least readily recognizable economic value are generally to be given the most emphasis.The economic traits are typically those that affect either the income obtained or the costs of production. So, a thorough understanding of economic traits of livestock is of utmost importance.
This is the 5th and final presentation in a 5-part webinar series on Breeding Better Sheep & Goats. The presenter is Susan Schoenian, University of Maryland Extension Sheep & Goat Specialist.
Genetic basis and improvement of reproductive traitsILRI
Presented by Aynalem Haile and Mourad Rekik (ICARDA) at the EIAR-DBARC-ICARDA-ILRI (LIVES)-FAO Training Workshop on Reproduction in Sheep and Goat, Debre Berhan, Ethiopia, 13-15 October 2014
The presentation is a study material on Bases of Selection - Family selection. It is useful for student fraternity, especially those study genetics and breeding
This PowerPoint is from a seminar originally presented at the 2010 Maryland Sheep & Wool Festival by Susan Schoenian, Sheep & Goat Specialist for University of Maryland Extension.
Improving breeding&reproductive performance of dairy animalsArab Khan
I gave presentation on this topic. Actually, this topic was difficult to search and to concise but have lot of knowledge that's why I selected it for my presentation.
This is the 4th webinar in a five part series on Breeding Better Sheep & Goats. This presentation entitled "Performance Evaluation" was given by Susan Schoenian, University of Maryland Extension Sheep & Goat Specialist.
Presented by Raphael Mrode, ILRI, at the workshop on Essential Knowledge for Effective Improvement and Dissemination of Genetics in Sheep and Goats, Addis Ababa, Ethiopia, 3–5 November 2020
Major economic traits of cattle and buffalopratee5
Selection and judging of the breeding stocks are the first and foremost steps to start with any breeding programme. For this, a no. of phenotypic and behavioral traits are taken into consideration. Breeding plans for cattle and buffalo should aim to meet the quantitative and qualitative demands of milk and meat in the country. From a practical standpoint, traits with a measurable or at least readily recognizable economic value are generally to be given the most emphasis.The economic traits are typically those that affect either the income obtained or the costs of production. So, a thorough understanding of economic traits of livestock is of utmost importance.
This is the 5th and final presentation in a 5-part webinar series on Breeding Better Sheep & Goats. The presenter is Susan Schoenian, University of Maryland Extension Sheep & Goat Specialist.
Genetic basis and improvement of reproductive traitsILRI
Presented by Aynalem Haile and Mourad Rekik (ICARDA) at the EIAR-DBARC-ICARDA-ILRI (LIVES)-FAO Training Workshop on Reproduction in Sheep and Goat, Debre Berhan, Ethiopia, 13-15 October 2014
The presentation is a study material on Bases of Selection - Family selection. It is useful for student fraternity, especially those study genetics and breeding
This PowerPoint is from a seminar originally presented at the 2010 Maryland Sheep & Wool Festival by Susan Schoenian, Sheep & Goat Specialist for University of Maryland Extension.
Improving breeding&reproductive performance of dairy animalsArab Khan
I gave presentation on this topic. Actually, this topic was difficult to search and to concise but have lot of knowledge that's why I selected it for my presentation.
This is the 4th webinar in a five part series on Breeding Better Sheep & Goats. This presentation entitled "Performance Evaluation" was given by Susan Schoenian, University of Maryland Extension Sheep & Goat Specialist.
This presentations gives some general guidelines for worm control in small ruminants. It was prepared by University of Maryland Extension Sheep & Goat Specialist Susan Schoenian.
This PowerPoint presentation is the second in a series of six that are part of a webinar series on Ewe and Doe Management from late gestation through weaning.
B4FA 2012 Nigeria: Principles of Genetics - Charles Amadib4fa
Presentation by Dr Charles Amadi, National Root Crops Research Centre, Umudike, Nigeria
Delivered at the B4FA Media Dialogue Workshop, Ibadan, Nigeria - September 2012
www.b4fa.org
General overview of patterns of transmission of single gene traitsPaul Adepoju
I delivered this presentation to fellow postgraduate students. It's on the various traits, normal and pathological, that are transmitted by single genes.
This tutorial deals with the introduction to Genetics.
1. Introduction to Genetics
2. Variations: Somatic and Blastogenic Variations (Continuous and Discontinuous {Meristic and Substantive} variations
3. Types of genetics
4. Blending inheritance
5. Pre-Mendelian Theories
6. Atavism
7. Evidence in favor of Blending Inheritance:
8. Terminologies related to Genetics.
Genetics is the scientific study of genes and heredity of how certain qualities or traits are passed from parents to offspring (National Institute of General Medical Sciences, 2022)
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
3. DNA (deoxyribonucleic acid)
• The genetic material that
controls how an animal
looks and performs.
• Exists as two long strands
spiraled into a double
helix.
• Is organized into
chromosomes.
4. Chromosomes
• Found in pairs in the
nucleus of every cell
of the body.
• There are two kinds
of chromosomes.
1. Autosomes
2. Sex chromosomes
5. Species differ in the number of
chromosomes they have.
n=60
n=54 30 pairs
27 pairs
6. AUTOSOMES SEX CHROMOSOMES
• Comprise all but one pair • Every animal has one pair
of chromosomes. of sex chromosomes.
• (Mostly) control features • There are two types of sex
the same in male and chromosomes denoted by
females.
the letters X and Y.
• Females have two of the
same kind of sex
chromosomes (XX).
• Males have two distinct sex
chromosomes (XY).
7. Sex determination
• The sex of the
offspring is
determined by the
sex chromosomes.
• Males contribute
either an X or Y
chromosome, thus
determine the sex
of the offspring.
• Diet may also affect
sex ratio.
8. Genes
• A unit of inheritance
composed of a segment
of DNA.
• Also in pairs.
• Encodes the amino acid
sequence of a protein.
• Physical location of
gene on DNA molecule
is called a locus (loci).
9. Alleles (usually denoted by letters)
• An alternative form of a
gene (one of the pair)
that is located at a
specific position of a
specific chromosome.
• Organisms have two
alleles for each trait or
the expression of a trait
may be affected by
multiple alleles.
10. HOMOZYGOUS HETEROZYGOUS
• When the two alleles are • When the two alleles are
the same. different.
11. RECESSIVE (lower case letter)
• Allele that causes a
DOMINANT (Capital letter) phenotypic trait that is only
• One allele masks the seen in the homozygous
expression of another allele genotype.
at the same loci.
• Overrides the traits of a A a
recessive allele in a
heterozygous pairing. AA
A Aa
a Aa aa
12. Dominant traits in sheep and goats
• Hairy fleece
• Red, tan hair sheep
• White wool
(most breeds)
• White goats
• Red Boers
• Polled
• Brown eyes
• Wattles
13. Recessive traits in sheep and goats
• Woolly fleece
• Colored fleece
(most breeds)
• Horns
• Blue eyes
• Myotonia
• Colored goats
• Black Boers
• Genetic defects
– Spider lamb disease
– Cryptorchidism
– Entropion
14. Incomplete or partial dominance
• When the dominant
allele is only partially
dominant.
• Example: scurs
15. Sex-limited inheritance
• Sex-linked - on X or Y
chromosome
Example: hemophilia
• Sex-limited - all or none
expressed by sex
Example: milk production
• Sex-influenced - genotype
+ sex determines
phenotype
Examples: horns in most
sheep and beards in goats.
16. Epistasis
• When the action of one
gene depends upon
another.
Example: fleece color, skin
color, coat color
• Inheritance of fleece and
coat color can be
complicated and varies by
breed.
17. Genetic linkages or co-inheritance
• Traits that tend to be
inherited together as a
consequence of an
association between
their genes.
Examples: polledness
in goats and
hermaphrodism
(intersex in the
homozygous female).
18. Genetic correlations and responses
• Extent to which the
genotypic values for one
trait predict the genotypic
values for the second
trait.
• Can be a positive or
negative relationship.
-1 ↔ +1
• Correlation can also be
due to environmental
influences.
21. No correlation (zero)
Scrapie genotype Production traits
Resistance to a disease Resistance to another disease
Reproductive rate Growth and carcass traits
Reproductive rate Wool traits
Horn condition Productivity
Color Productivity
Genetic correlations tend to vary by breed and study.
23. Inheritance
• Each sperm and egg
contains one
chromosome from each
pair of chromosomes of
the parent.
• Which chromosome
of a pair ends up in a
particular sperm or egg
is determined purely by
chance.
24. Inheritance
• There are 134,217,728
(227) possible
combinations of the 54
or 60 chromosomes in a
sperm or egg produced
by a male and female.
? • This results in
considerable variation
in the progeny from the
same mating.
26. GENOTYPE (G) PHENOTYPE (P)
• The genetic make-up of a • The observable or
cell, organism, or animal. measurable traits of an
• Determines hereditary organism: what we can see
potential and limitations of or measure.
the individual.
• Determined by
genetics, plus
environmental influences
(E).
P=G+E
27. Environmental influences
• Diet
• Health
• Weather
• Age
• Type of birth and
rearing
• Age of dam
• Housing
• Season of birth
29. Two kinds of traits
1. Qualitative
2. Quantitative
(or polygenic)
30. QUANTITATIVE
QUALITATIVE • Continuous in
• Phenotype falls into expression.
specific category. • Considerable variation
• Usually affect by in phenotype.
one or few genes. • Under the influence
• Very little influence of many genes
of the environment. • Much more
environmental
influence
31. Qualitative traits
• Blood type
• Eye color
• Coat type
• Fleece or coat color
• Horns
• Wattles
• Beards
• Inherited defects
– Entropion
– Spider lamb disease
– Cryptorchidism
– Myotonia