MASS SELECTION FOR POST-WEANING GROWTH IN SWINE: II. RESPONSE TO SELECTION
- 1 August 1971
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Animal Science
- Vol. 51 (2), 497-502
- https://doi.org/10.4141/cjas71-065
Abstract
Recurrent mass selection for post-weaning average daily gain was practiced for seven generations in a population of Lacombe swine. Response to selection was positive, but the observed response was estimated to be only 0.33 of the predicted. The pooled estimate of additive genetic variance was 0.0013 ± 0.0002. Realized heritability was 0.126 ± 0.029. The pooled estimate of heritability obtained from components of variance and parent-offspring regression was 0.377 ± 0.058. Litter size was positively correlated with average daily gain (0.14 piglet per generation). No significant effects of selection in reducing additive genetic variance were observed.Keywords
This publication has 3 references indexed in Scilit:
- MASS SELECTION FOR POST-WEANING GROWTH IN SWINE: I. THE VALUE OF A PEDIGREED CONTROL POPULATIONCanadian Journal of Animal Science, 1971
- Selection for High and Low Fatness in SwineJournal of Animal Science, 1967
- Attenuation of genetic progress under continued selection in poultryHeredity, 1951