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Selection for egg mass in the domestic fowl 2. packed sperm volume fertility and hatchability responses


Poultry Science 60(8): 1782-1787
Selection for egg mass in the domestic fowl 2. packed sperm volume fertility and hatchability responses
A rapid genetic response was observed in male chickens selected for high packed-sperm volume (PSV) as a possible corollary to high egg mass in females. The PSV increased from 15% in the S0 generation to 22% in the S4 generation in 2 lines. Only minor changes were observed in the PSV of 2 nonselected lines during this same period. Realized heritability estimates for PSV, obtained by dividing the cumulative response by the cumulative selection differentials, were 0.48 and 0.44. Fertility levels in lines selected for high PSV were 20-25% lower than fertility levels in nonselected PSV lines in the S3 generation. Selection for high PSV apparently resulted in a decrease in the fertility levels of females mated to high PSV males. Although hatchability levels were lower in lines selected for high PSV than in nonselected lines, hatchability differences between lines were not significant.


Accession: 006380483

DOI: 10.3382/ps.0601782



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