Studies On Response And Correlated Response To Selection In Mice
Loading...
Date
1989
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Birsa Agricultural University, Ranchi
Abstract
Based on the results of this study the following:
Conclusions may be drawn:
1. The body weight and tail length at 6 weeks of age were found to be moderately heritable in the base population.
2. The genetic and phenotypic correlations between the two traits were found to be positive and high in magnitude.
3. The expected and realized cumulative selection differential consistently increased over generations in all the lines.
4. The response to selection for 6-week body weight was almost consistent over generations. However, discrepancy existed between the expected and observed responses.
5. The effect of selection, generation and generation x selection with respect to body weight and tail length at 6 weeks of age were highly significant. There was marked departure from linearity in the trend of improvement in the mean values over generations. The selection was found to be more effective in females than males,
6. The response was markedly high at 50% level of selection than that of 75% for body weight.
7. The correlated response of 6-week body weight while selecting for tail length and vice versa were found to have increasing trend and were mostly consistent over the generations.