Article Id: ARCC2352 | Page : 128-130
Citation :- GENETIC ANALYSIS OF GROWTH RATE IN A SYNTHETIC BROILER STRAIN.Indian Journal of Animal Research.2008.(42):128-130
Vikram Singh and L.S. Jain
Address : Maharana Pratap University of Agriculture and Technology, Udaipur - 313 001, Rajasthan, India.


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.


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