Animal Breeding Flashcards
Study of principles of INHERITANCE and VARIATION in farm ANIMALS
Animal Genetics
GOAL OF ANIMAL BREEDING
- keep and use animal records (essential step)
- selection (the best, the most superior)
- system of mating
application of the principles of animal genetics with the goal of IMPROVEMENT of animals
Animal Breeding
art and science of the GENETIC IMPROVEMENT
Animal Breeding
activities expected of
animal breeders
- Determine the genetic variation
- Develop statistical model for predicting breeding values
- Measure & predict genetic progress
- Organize testing & recording program
- Provide result
(DDMOP)
-backbone of modern animal breeding
Quantitative & Statistical genetics
Austrian monk
garden pea
-inheritance of character
Gregor Mendel (1865)
Rediscovered the work of Mendel
1901
- Hugo de Vries
- Carl E. Correns
- Erich von Tschermak
- Studied the inheritance of some traits of CHICKEN
- Mendelian law is applied in animals
William Bateson (1906)
introduced GENE, GENOTYPE, PHENOTYPE
Wilhelm Johannsen
Chemical structure & function of the gene (double helix)
James Watson & Francis Crick (1956)
Father of Animal Breeding
Robert Bakewell (1725-1795)
Father of modern Animal Breeding
Jay Lush
Los Banos Breeding Animals
Philamin cattle, Berkjala pigs, LB-cantonese chickens
Who created the “bitik” “tikbi”
Dr. Cecilio R. Arboleda
Formulated the mule ducks/laguna ducks from peki, pateros and muscovy
Dr. Angel L. Lambio
Develop the itik Pinas
Dr. Rene C. Santiago
Group of animals of common origin that possesses DISTINGUISHABLE CHARACTERISTICS
breed
occur only in one country
Local breed
breed that occur in more than one country
Transboundary breed
Example of Transboundary breed
Landrace
Difference between Bos indicus and Bos taurus
Bos indicus may hump while taurus wala
Variations in Phenotype
Qualitative and Quantitative traits
actual variation we observe
among animals for each trait of interest.
Phenotypic variation
refers to the genes that make up the animal.
Genotype
amount of variation that is controlled
by genes.
Genetic variation
Different forms
of the same gene are called
alleles
It is a part of the cell which is the complete set of genetic instruction
Genome
it carry genetic material except sex
Autosomes
summing up of effects of alleles of a gene and of effects of
genes at different chromosome locations to make up a trait
additive gene action
collection of semen from the male and artificially
introducing it into females to obtain pregnancy
artificial insemination (AI)
most accurate statistical method
used for the prediction of breeding values and genetic trends in livestock breeding
populations
Best Linear Unbiased Prediction (BLUP)
⅝ Berkshire and ⅜ Philippine native pigs from Jala-jala, Rizal
Bekjala pigs
group of animals that only breed among themselves and show persistent
differences from other members of similar breeds or species
breed
ability of two or more breeds to combine well to produce
superior crossbred progeny
breed complementarity
crossing of two different breeds or lines of animals
crossbreeding
process of cooling and storing cells (sperms and embryos),
tissues, or organs at very low (freezing) temperatures to maintain their viability
cryopreservation
opposite of selection
culling
number of females that are removed from the herd
culling rate
line, breed or crossbreds selected for a combination of good female
reproductive performance
dam line
type of gene action which describes one allele overriding or dominating another at the same locus
dominance gene action
reproductive technique that allows cloning of the embryo to produce identical (monozygotic) twins
embryo splitting
interaction of different genes so that they tend to enhance
each other or cancel each other out, rather than adding together
epistatic gene action
estimate of the genetic value of an animal as a
potential parent of the next generation
Estimated breeding value
manipulating the animal’s estrous cycle to cause the
majority of breeding females to show standing estrus around the same time
estrus synchronization
breed that is not native to a particular area or region; also called
introduced (or invasive)
exotic breed -
half the breeding value of an animal; also
called estimated transmitting ability (ETA)
expected progeny differences (EPDs)
basic unit of inheritance composed of linear sequence of nucleotides, each
containing an organic base, a pentose sugar, and a phosphate
gene
length of time it takes an individual to be replaced by one of its
offspring
generation interval
amount of variation that is controlled by genes
genetic variation