volume 47 issue 2 (april 2013) : 132-136
GENETIC AND PHENOTYPIC PARAMETERS OF ECONOMIC TRAITS IN WHITE LEGHORN
1Krishi Vigyan Kendra, Jind- 126 102, India
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Indian Journal of Animal Research
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volume 47 issue 2 (april 2013) : 132-136
GENETIC AND PHENOTYPIC PARAMETERS OF ECONOMIC TRAITS IN WHITE LEGHORN
1Krishi Vigyan Kendra, Jind- 126 102, India
ABSTRACT
Data pertaining to the present study were collected from records spreading over nine generations i.e. 1994-95 to 2002-03 for the performance traits of purebreds of two strains (H and C) of White Leghorn reared . Pullets were significantly heavier at 20 weeks of age in G6 followed by G7 and lighter in G1. At 40 weeks of age, pullets were heavier in G6, G3 and G5. Differences in generation means for different traits might be accounted for by the effect of both selection and environmental factors. The egg production was more during the initial three generations of study whereas it declined sharply in the fourth and sixth generations. Egg number was found to be more important than egg weight in determining the egg mass. Differences in the mean over the generations might be accounted for by the effect of selection and environmental factors. Non-additive genetic variation existed for various components of egg laying productive traits evidenced from low estimate of heritabilities and may be exploited through some sort of crossbred selection schemes. Most of the phenotypic correlations were highly significant (P
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In this Article
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Published In
Indian Journal of Animal Research