Abstract
THE consequences of inbreeding in poultry assume greater importance as hybridization becomes more widespread in the poultry industry. Hybrid chickens are being sold commercially today, and an important phase in the breeding program is the development and maintenance of inbred lines.The primary effect of inbreeding is to produce homozygosis. As a consequence of this increased homozygosis, the individuals may show a decline in performance. This decline in performance is perhaps the most important single limiting factor in the development and maintenance of inbred lines. Relatively little is known regarding the exact nature of these adverse effects.Wilson (1948) pointed out that reproductive performance is the product of four biological components: (1) egg production; (2) fertility; (3) hatchability, and (4) viability of offspring. Knowledge of the effect of inbreeding on each of these characteristics is necessary for the poultry breeder to make intelligent decisions regarding the number and size of …
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