Selection Response and Realized Heritability in Individual Selection for 28-Day Body Weight in Japanese Quail (Coturnix coturnix japonica)
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Date
2019-10
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Abstract
A selection experiment was conducted in an egg type Japanese
quails for improvement of fourth week body weight. A total of 6,242
Japanese quails taken in two hatches formed the base population (G0) for
this study. A random bred control and a selected population were developed
from this base population. The results of one generation of selection are
described in this paper. The selected parents of 60 sires and 240 dams were
bred by rotational mating in pair mating cages to produce 4312 progenies in
five hatches. The performance of G0 and G1 populations in terms of body
weight at day-old and second and fourth weeks of age were studied. In the
base population, the class interval from 130.1 to 140.0g had high frequency
of 0.26 for fourth week body weight. The average expected and effective
selection differentials were 18.66 and 22.41g. The overall mean fourth
week body weight in base population was 141.56g, which improved to
154.79g in one generation of selection, resulting in phenotypic response of
13.23g. As there was 3.54g environmental deviation recorded in control
population, the estimate of genetic response was 9.69g. The phenotypic and
genetic responses recorded for second week body weight were 8.64 and
6.74g respectively. The realized heritability for fourth week body weight in
Japanese quails was estimated as 0.43 in this experiment.
Description
TNV_VRI_2019_7(4)228-233