volume 42 issue 2 (june 2008) : 128-130
GENETIC ANALYSIS OF GROWTH RATE IN A SYNTHETIC BROILER STRAIN
1Maharana Pratap University of Agriculture and Technology,
Udaipur - 313 001, Rajasthan, India.
Published In
Indian Journal of Animal Research
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volume 42 issue 2 (june 2008) : 128-130
GENETIC ANALYSIS OF GROWTH RATE IN A SYNTHETIC BROILER STRAIN
1Maharana Pratap University of Agriculture and Technology,
Udaipur - 313 001, Rajasthan, India.
ABSTRACT
615 Chicks were taken in the three hatches being the progeny of 96 females and 16 males. The
average per day body weight gain between 0-2, 2-4, 4-6, 6-8 and 0-8 weeks of age were 7.46±0.09,
14.89±0.14, 43.44±0.28, 61.40±0.32 and 31.83±0.08g, respectively. The effect of hatch was found
to be highly significant on growth traits except 4-6 week growth rate. The growth rate was significantly
higher in males than females. The heritability estimates were low (0.136±0.085) for 6-8 week
growth rate, moderate (0.237±0.117) and 0.385±0.160 for 0-8 week growth rate and 4-6 week
growth rate and higher at 0.401±0.165 and 0.695±0.239 for 0-2 week and 2-4 week growth rate
respectively. The genetic association of 0-2 week and 2-4 week with 6-8 week and 0-8 week were
positive and moderate. The phenotypic association of growth rate between 0-2, 2-4, 4-6 and 6-8
week had positive and significant with growth rate of 0-8 weeks of age. Most of the environmental
correlations among growth traits were low either positive or negative.
average per day body weight gain between 0-2, 2-4, 4-6, 6-8 and 0-8 weeks of age were 7.46±0.09,
14.89±0.14, 43.44±0.28, 61.40±0.32 and 31.83±0.08g, respectively. The effect of hatch was found
to be highly significant on growth traits except 4-6 week growth rate. The growth rate was significantly
higher in males than females. The heritability estimates were low (0.136±0.085) for 6-8 week
growth rate, moderate (0.237±0.117) and 0.385±0.160 for 0-8 week growth rate and 4-6 week
growth rate and higher at 0.401±0.165 and 0.695±0.239 for 0-2 week and 2-4 week growth rate
respectively. The genetic association of 0-2 week and 2-4 week with 6-8 week and 0-8 week were
positive and moderate. The phenotypic association of growth rate between 0-2, 2-4, 4-6 and 6-8
week had positive and significant with growth rate of 0-8 weeks of age. Most of the environmental
correlations among growth traits were low either positive or negative.
KEYWORDS
REFERENCES
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- Khan, A.G. et al. (1994). Indian J. Anim. Sci., 64: 1383-84.
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- Robertson, A (1959). Biometrics, 15: 469-485.
- Snedecor, G.W and Cochran, W.G. (1968). Statistical Methods. 6th Ed. Oxford and IBH Publishing Co., New Delhi.
- Swiger, R.A. et al. (1964). Biometrics, 20: 818-826.
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In this Article
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Published In
Indian Journal of Animal Research