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Evaluation of Relative Body Weight Gain in Short Term Selection for Different Ages in Japanese Quail

Ashok Anandakumar Prabakaran R.
Vol 2(2), 146-152

Meat type Japanese quail were subjected to three different methods of individual phenotypic selection viz., high two week body weight (SWL), four week body weight (FWL) and high four week body weight coupled with low relative body weight gain between 4-6 weeks of age (LWL) and a control (COL) without adopting any selection for three generations. The overall least squares mean for relative body weight gain (RGW) during 1, 2,3,4,5 and 6 weeks of age were 377.68±3.28, 108.88±1.87, 56.28±1.43, 29.23.10±0.59, 15.14±0.39 and 11.23± 0.30 g, respectively. The least squares means of RGW ranged from 374.39±3.69 at RGW1 to 11.58±0.33 per cent at RGW6 in SWL line, 383.21±3.58 to 11.10±0.32 per cent in FWL line, and 374.51±3.78 to 10.85±0.34 per cent LWL line respectively. In COL line the means RGW varied from 378.60 ±3.81 of RGW1 to 11.41±0.34 per cent of RGW6. In all groups the RGW was the highest during 1st week which then declined up to six weeks of age.

Keywords : Japanese quail- selection- body weights- relative growth rate

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