Estimation of the number of loci controlling the male body size in the guppy [Poecilia reticulata]
1995
Yamanaka, M. (Tohoku Univ., Sendai (Japan). Faculty of Agriculture) | Nakajima, M. | Fujio, Y.
Comparative growth profiles were investigated for strain difference between F and S3 of the guppy, Poecilia reticulata. There was an obvious difference in body length between female and male from Day 60, which become more pronounced with growth to Day 180. Size difference was more apparent in the male body length; F was larger than S3. Using the strain comparison between F and S3 strains, the heritability of body length at various ages was estimated, and the high heritability was obtained from Day 60 (h square = 0.877) to Day 180 (h square = 0.912) in the males. The number of loci affecting the male size difference between F and S3 strain was estimated from F1 and F2 generations in the crosses of F and S3, and approximately 9 loci affecting the male body size at Day 180 were computed
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