Estimation of maternal,sex-linked and additive x additive epistatic gene effects for body size of Tribolium |
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| Authors: | E. A. Carbonell J. J. Frey A. E. Bell |
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| Affiliation: | (1) Department of Animal Sciences, Purdue University, 47907 West Lafayette, IN, USA;(2) Present address: Instituto Nacional de Investigaciones Agrarias, Jose Abascal 56, 3 Madrid, Spain;(3) Present address: Pfizer Inc., 235 E. 42nd Street, 10017 New York, NY, USA |
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| Abstract: | Summary The genetic structure of two quantitative traits, 13-day larval weight and pupal weight, in two unselected populations of Tribolium castaneum was investigated by the genetic model of Carbonell et al. (1983). The variability among two and three-way crosses was analyzed into components due to: general and specific combining abilities, maternal, sex-linkage, specific reciprocal and additive-by-additive epistasis. Also, indirect evidence of higher order epistasis was studied. It is concluded that the heterotic trait larval weight is highly affected by sex-linked genes and by non-additive gene action with additive-by-additive as well as higher order epistasis playing major roles. Pupal weight, on the other hand, is determined mostly by additive gene action although epistasis is also a significant source for genetic variability. Both traits are significantly influenced by maternal effects.Journal Paper No. 9033 from Purdue University Agricultural Experiment Station. Based in part on PhD Theses submitted by the first two authors at Purdue University |
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| Keywords: | A x A epistasis Maternal effects Sex-linkage Tribolium Body weight |
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