TY - JOUR
T1 - Effect of Non-Genetic Factors on Absolute Growth Rate in Short Term Selection for Different Ages in Japanese Quail
AU - Ashok, A. AU - Prabakaran, R.
JO - Research Journal of Poultry Sciences
VL - 5
IS - 3
SP - 36
EP - 38
PY - 2012
DA - 2001/08/19
SN - 1993-5285
DO - rjpscience.2012.36.38
UR - https://makhillpublications.co/view-article.php?doi=rjpscience.2012.36.38
KW - Japanese quail
KW -selection
KW -body weights
KW -non-genetic factors
KW -absolute growth rate
KW -generation
AB - Meat type Japanese quail were subjected to three different
methods of individual phenotypic selection viz., high 2 weeks body weight (SWL),
4 weeks body weight (FWL) and high 4 weeks 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 effects of lines, generations,
sexes and hatches were significant (p<0.01) on Absolute Growth rate (AGW)
of birds at all the ages studied barring the influence of sex on body weight
at hatch. The least square means of AGW during 1st-6th weeks of age were 26.38±0.37,
43.66±0.64, 37.42±0.69, 27.70±0.70, 23.76±0.61 and18.02±0.56
g, respectively in base (S0) generation and the corresponding means
in first S1 generation were 22.99±0.37, 32.93±0.65,
26.96±0.70, 27.82±0.71, 21.27±0.61 and 17.83±0.57
g. In second (S2) generation the AGW were 28.44±0.36, 36.59±0.62,
49.08±0.66, 36.24±0.67, 17.91±0.58 and 18.57±0.54
g and the corresponding means in (S3) generation were 27.42±033
37.97±0.57, 41.06±0.60, 34.16±0.61, 25.10±0.53 and
23.63±0.49g, respectively. The least squares means of AGW during 1st-6th
weeks of age were 26.00±0.33, 37.15±0.57, 38.46±0.62, 29.71±0.62,
17.46±0.54 and 13.11±0.50 g in males and 26.61±0.0.32,
38.43±0.56, 41.06±0.60, 34.16±0.61, 25.10±0.53 and
23.63±0.49 g in females, respectively. The AGW of females was found to
be significantly (p<0.05) higher than that of males at all the ages studied.
ER -