An experiment was conducted on hamsters to examine response to selection using information on a correlated^trait in combination with reproductive traits based on BLUP under a multrple-«n ^ n a l model The base population was established with progenies of 4-way cross sires and dams using 4 inbred toes. The nooulation^was subdivided into a selection line for litter size at birth, litter weight at weaning and 8-week tody weight (line W), a selection line for litter size and litter weight Owe R) and a control line: (lineQ . Lines W and R were elected from a high aggregate genotype based on a mulbple-trait animal modeh Lm C was maintained as a randomly breeding control. Line W showed much larger ^ ^ 1 ^ w T L C line R for each trait. Mean litter sizes at generation 15 were 12.5, 12.1 and 10.3 for the lin > ’ respectively. Deviations in W and R from C, 2.2 and 1.8 pups, respectively were statisticafiy significant (P<0.01). Mean litter weights at generation 15 were 275 g, 240 g and 204 g or ines , “ ' respectively Deviations of the selected lines from the control line were significant (P<0.01 . For selected J S S vm high., in line R than f t . W. Tb. u« * » « ^ and litter weight as a selection criterion brought larger response in the two traits

M. Satoh, T. Obata

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 19. Selection and quantitative genetics; growth; reproduction; lactation; fish; fiber; meat., , 276–279, 1994
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