GENETIC AND PHENOTYPIC CORRELATION BETWEEN SPERM EGG PENETRATION AND FERTILITY, HATCHABILITY IN WHITE LEGHORN CHICKENS

J. A. K. Al-Rawi, A.; J. Al-Daraji, H.; F. Al-Baghdadi, M.

	GENETIC AND PHENOTYPIC CORRELATION BETWEEN SPERM EGG PENETRATION AND FERTILITY, HATCHABILITY IN WHITE LEGHORN CHICKENS
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 4, Issue 16, 2011, Pages 0-0
Authors
A. J. A. K. Al-Rawi; H. J. Al-Daraji; M. F. Al-Baghdadi
Abstract
This study was conducted at the Poultry Farm of the Animal Resource Department, College of Agriculture, Baghdad University, during the period from 8/10/2007 to 28/3/2009, to study the genetic evaluation of White Leghorn flock for selection according to sperm– egg penetration, fertility and hatchability traits, after the adjustment of fixed effects, and estimate of its genetic parameters. The General Linear Model –GLM procedure, within the SAS program was used to study the effect of fixed factors, and to determined the random effect using Restricted Maximum Likelihood – REML, for sire (38), dams (114). These values were ranked in descending order for selection purpose. Results obtained can summarized as follows :Means of sperm – egg penetration was 74.25 hole / 1.5 mm2,and the average of fertility 81.44%, hatchability of fertile eggs and hatchability of setting eggs were 83.02 and 76.23%, respectively. The percentage of embryonic mortality was 7.72%, 3.37%,5.89% for first, second, and third period, respectively, Whereas the heritabilities for these traits were 0.79, 0.06, 0.09, 0.14, 0.22, 0.26, 0.19, respectively. The effect of season on traits include in this study was highly significant (P < 0.01) in winter than in summer. There were highly significant correlations between SP and fertility (0.86, 0.91), hatchability of fertile egg (0.85, 0.89), hatchability of setting egg (0.81, 0.87).

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