Studies on Two way family selection for Egg Production and Its Correlated Responses to some unselected Fitness Traits in Trinolium Castaneum
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Date
1986
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Birsa Agricultural University, Ranchi
Abstract
The effects of selection, generation and generation x selection with respect to total egg production (eth-10th day egg number) were highly significant (P/ 0.01) in both the high and low lines. The replicate, generation x replicate and selection x replicate effects were non-significant. In the high lines the phenotypic and genetic responses vere larger at higher intensity of selection. In all the high and low lines there was good agreement between the average realised and predicted responses per generation for the selected trait. There was symmetry in response for the high and low lines at both the selection intensities. For each selection intensity the divergence increased gradually between the two lines.
The trend of observed correlated responses in 8th, 9th and 10th day egg number was positive through out the experimental period. The trend in hatchability was, in general, positive. As regards, pupation time and adult emergence time the trend was in negative direction.
There was fair agreement between the observed and expected correlated responses with respect to 8th, 9th and 10th day egg number. The realised correlated responses for hatchability, pupation time and adult emergence time, however, fell short that of the predicted ones.
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Studies on Two way family selection for Egg Production and Its Correlated Responses to some unselected Fitness Traits in Trinolium Castaneum
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Studies on Two way family selection for Egg Production and Its Correlated Responses to some unselected Fitness Traits in Trinolium Castaneum