![]() ![]() The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. ![]() Necessary cookies are absolutely essential for the website to function properly. Principles of Inheritance and Variation.New Questions and Answers and Forum Categories ![]() Out breeding is the breeding between the unrelated animals which may be between individuals of the same breed (but having no common ancestors) or between different breeds (cross breeding) or different species (interspecific hybridization). This often helps in restoring fertility and yield. In this condition, the selected animals of the breeding population should be mated with superior animals of the same breed but unrelated to the breeding population. But continued inbreeding reduces fertility and even productivity. It also helps in accumulation of superior genes and elimination of less desirable genes. Inbreeding exposes harmful recessive genes that are eliminated by selection. Thus inbreeding is necessary if we want to develop a pure line in any animal. Inbreeding, as a rule, increases homozygosis. As the homozygous pure lines developed by Mendel as described in Chapter 5, a similar strategy is used for developing pure lines in cattle as was used in case of peas. On the other hand, a superior male is that bull, which gives rise to superior progeny as compared to those of other males. A superior female, in the case of cattle, is the cow that produces more milk per lactation. The progeny obtained from such mating are evaluated and superior males and females are identified for further mating. Superior cows and superior bulls of the same breed are identified and mated. Inbreeding may be explained by taking an example of cows and bulls. When breeding is between animals of the same breed for 4-6 generations, it is called inbreeding. Two methods of animals breeding are: inbreeding and out breeding, based mainly on breeding work with cattle. Your job is to breed these animals to produce. (vi) increased or, at least, acceptable reproduction rate. As an animal breeder, youll work with animals that may include pigs, cows, chickens, sheep, horses, dogs or cats.
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