Research Journal of Poultry Sciences

Year: 2008
Volume: 2
Issue: 1
Page No. 9 - 14

Effect of the Slow (K) or Rapid (k+) Feathering Gene on Growth Performance and Skeletal Dimensions of Broiler Chickens Selected for Cut up Carcass Value

Authors : Heshmatollah Khosravinia

Abstract: An experiment was undertaken to evaluate the impact of slow/rapid feathering sex linked-gene on growth performance and certain skeletal dimensions in a broiler flock under selection for breast and thighs weight with imposing restriction against low value portions of carcass over 3 generations. Analysis of variance for all factors involved demonstrated that k+k+/k+W genotypes are significantly superior than K-/KW for BW at 1 and 14 day with reverse results for BW (42 days), BrL, ShW and DSC (p< 0.05). Inter sex t-test comparisons revealed significant superioty of k+k+ males for BW (1 day) and GW (28-42 days). The K- females showed significant greater ShW and DSC. Inter family analysis revealed significant superiority of k+k+/ k+W genotypes for BW (1 day) in 3 families. In one family, GW (1-42 days) was significantly greater for slow feathered birds while in 2 other families the same birds showed significant greater means for GW (28-42 days) (p< 0.05). The slow feathered birds demonstrated significantly greater means for BrA in 3 families and BrI in 2 families (p< 0.01). Inter family and inter females t-test comparisons showed significant superiority of KW genotypes for BW (14 days) in 3 families and for BrA, BrI, ShL and ShW in 4 other distinct families. Considering KW vs k+W in an ANOVA for female�s data revealed consistent superioty of the fast feathered females (k+W) for all growth related traits (except for BW at 28 days) as well as CW. Mean BrL and ShL were significantly greater for slow feathered females while they were inferior for DSC. It is concluded that to incorporate fast feathering gene (k+) in broiler breeding plans would be of positive economic outcome in commercial broiler production.

How to cite this article:

Heshmatollah Khosravinia , 2008. Effect of the Slow (K) or Rapid (k+) Feathering Gene on Growth Performance and Skeletal Dimensions of Broiler Chickens Selected for Cut up Carcass Value . Research Journal of Poultry Sciences, 2: 9-14.

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