Quick Answer: What Is Pedigree Selection?

What is basis of selection?

Only purposeful selection will permit an increased frequency of desirable genes.

The amount of genetic improvement gained depends on four factors: (1) heritability of the trait, (2) amount of selection pressure, (3) genetic association of selected traits, and (4) generation interval..

What are 4 examples of selective breeding?

Selective breedingcows that produce lots of milk.chickens that produce large eggs.wheat plants that produce lots of grain.

Which breeding method is suitable for waiting for selection opportunity?

 This method is also known as “Mass Method” or the “The Population Method”.  Bulk population breeding is a strategy of crop improvement in which the natural selection effect is solicited more directly in the early generations of the procedure by delaying stringent artificial selection until later generations.

Which is the oldest breeding method?

Selection also called the German method is the oldest plant breeding method.It is the preservation of plants of desirable characters and then growing them. Thus the correct answer is option B.

What is pure line theory?

Pure Line Theory. A pure line is the progeny of a single self fertilized homozygous plant. The concept of pureline was proposed by Johannsen on the basis of his studies with beans (Phaseolus vulgaris) variety called Princess.

How is mutation breeding done?

Mutation breeding, sometimes referred to as “variation breeding”, is the process of exposing seeds to chemicals or radiation in order to generate mutants with desirable traits to be bred with other cultivars. … Plants created using mutagenesis are sometimes called mutagenic plants or mutagenic seeds.

Who proposed pure line theory?

Wilhelm JohannsenAbstract. In the early twentieth century, Wilhelm Johannsen proposed his pure line theory and the genotype/phenotype distinction, work that is prized as one of the most important founding contributions to genetics and Mendelian plant breeding.

What is the best type of cow?

Top 10 most popular cattle breeds in the United StatesCharolais. Image courtesy of Pixabay. … Hereford. Image courtesy of Pixabay. … Simmental. Image courtesy of Pixabay. … Red Angus. Image courtesy of USDA, Flickr. … Texas Longhorn. Image courtesy of Pixabay. … Gelbvieh. Image courtesy of luagh45, Flickr. … Holstein. Image courtesy of USDA, Flickr. … Limousin. Image courtesy of Pixabay.More items…•May 2, 2018

What is the importance of pedigree in stock selection?

Pedigree selection can be made more useful by giving all information good and bad about ancestors, including the collateral relatives. Pedigree selection is particularly useful for initial selection for traits that are expressed in only one sex. Such selections can be made early and inexpensively.

How pedigree selection is done?

Applications of pedigree method  Pedigree method is the most commonly used method for selection from segregating generations of crosses of self pollinated crops.  This method is often used to correct some specific weaknesses of an established variety.

What is pedigree selection while judging of animals?

Selection on the basis of performance of the ancestors is called as pedigree selection. Pedigree selection is very useful when the traits selected are highly heritable.

What is selection in animal husbandry?

Selection describes the process of choosing animals that meet the requirements of the breeding objective and will, in a breeding enterprise, pass particular traits onto their progeny. Selection should consider both subjectively measured traits (visual assessment) and objectively measured traits (genetic assessment).

What is pure line selection?

Pure-line selection involves selecting and breeding progeny from superior organisms for a number of generations until a pure line of organisms with only the desired characteristics has been established.

What is important during animal selection?

The breeding stock should pass the good qualities to their offsprings for better performance, to improve the livestock. Selection process repeated for many generations increases chances of formation of desirable qualities in an animal. … Selection helps improve characteristics which are highly heritable.

What is meant by family selection?

Family selection refers to mating of organisms from the same ancestral stock that are not directly related to each other. Pure-line selection involves selecting and breeding progeny from superior organisms for a number of generations until a pure line of organisms with only the desired…

What are the disadvantages of mutation breeding?

The important limitations of mutation breeding are:They are sometimes harmful to organism.The frequencies of the mutants which are desirable are usually low.The absence of detailed information of the mutagens is not good method of crop improvement.More items…

What is pedigree selection in plant breeding?

In pedigree method individual plants are selected from F2 and their progenies are tested in subsequent generations. A record of the entire parent off spring relationship is maintained and known as pedigree record.

What is the difference between selection and culling?

Selection is the process of allowing certain animals to be parents of future generations while culling others. Culling is the removal of animals which do not perform to the desired level, from the herd. … Selection process repeated for many generations increases chances of formation of desirable qualities in an animal.

What is mass selection?

 Mass selection refers to a methods of crop improvement in which individual plants are selected on the basis of phenotype from a mixed population, their seeds are bulked and used to grow next generation.

What is mutation breeding give an example?

Examples include the long-grained rice called Jiafuzhan, which is a product of mutation. This was developed using ionizing radiations. It was developed inducing high radiation on the pollen grains of the plant and is a very stable mutation.

What is pure line?

The definition of a pure line is a result of inbreeding where animals or plants have certain characteristics that are the same through generations. An example of a pure line is the result of inbreeding of a certain flower to help it fight off diseases. noun.