THE DIMENSIONALITY OF GENETIC VARIATION FOR WING SHAPE IN DROSOPHILA MELANOGASTER
THE DIMENSIONALITY OF GENETIC VARIATION FOR WING SHAPE IN DROSOPHILA MELANOGASTER
复制标题
果蝇翅膀形状遗传变异的维度
DOI:
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发表时间:
2005
期刊:
影响因子:
--
通讯作者:
D. Houle
中科院分区:
文献类型:
--
作者:
J. Mezey;D. Houle
Abstract Absolute constraints are limitations on genetic variation that preclude evolutionary change in some aspect of the phenotype. Absolute constraints may reflect complete absence of variation, lack of genetic variation that extends the range of phenotypes beyond some limit, or lack of additive genetic variation. This last type of absolute constraint is bidirectional, because the mean cannot evolve to be larger or smaller. Most traits do possess genetic variation, so bidirectional absolute constraints are most likely to be detected in a multivariate context, where they would reflect combinations of traits, or dimensions in phenotype space that cannot evolve. A bidirectional absolute constraint will cause the additive genetic covariance matrix (G) to have a rank less than the number of traits studied. In this study, we estimate the rank of the G-matrix for 20 aspects of wing shape in Drosophila melanogaster. Our best estimates of matrix rank are 20 in both sexes. Lower 95% confidence intervals of rank are 17 for females and 18 for males. We therefore find little evidence of bidirectional absolute constraints. We discuss the importance of this result for resolving the relative roles of selection and drift processes versus constraints in the evolution of wing shape in Drosophila.
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影响因子:
3.3
作者:
Weber,KE
通讯作者:
Weber,KE
影响因子:
3.3
作者:
Weber,KE
通讯作者:
Weber,KE
影响因子:
3.3
作者:
K. Weber;R. Eisman;S. Higgins;L. Morey;A. Patty;M. Tausek;Z. Zeng
通讯作者:
K. Weber;R. Eisman;S. Higgins;L. Morey;A. Patty;M. Tausek;Z. Zeng
影响因子:
3.3
作者:
D. Houle
通讯作者:
D. Houle
影响因子:
3.3
作者:
Weber,K;Eisman,R;Morey,L;Patty,A;Sparks,J;Tausek,M;Zeng,ZB
通讯作者:
Zeng,ZB