Rate of evolutionary change in cranial morphology of the marsupial genus Monodelphis is constrained by the availability of additive genetic variation.
Rate of evolutionary change in cranial morphology of the marsupial genus Monodelphis is constrained by the availability of additive genetic variation.
复制标题
有袋动物属 Monodelphis 颅骨形态的进化变化率受到附加遗传变异可用性的限制。
DOI:
10.1111/jeb.12628
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发表时间:
2015
影响因子:
2.1
通讯作者:
Cheverud,JM
中科院分区:
文献类型:
--
作者:
Porto,A;Sebastião,H;Pavan,SE;VandeBerg,JL;Marroig,G;Cheverud,JM
We tested the hypothesis that the rate of marsupial cranial evolution is dependent on the distribution of genetic variation in multivariate space. To do so, we carried out a genetic analysis of cranial morphological variation in laboratory strains ofMonodelphis domesticaand used estimates of genetic covariation to analyse the morphological diversification of theMonodelphis brevicaudataspecies group. We found that within‐species genetic variation is concentrated in only a few axes of the morphospace and that this strong genetic covariation influenced the rate of morphological diversification of thebrevicaudatagroup, with between‐species divergence occurring fastest when occurring along the genetic line of least resistance. Accounting for the geometric distribution of genetic variation also increased our ability to detect the selective regimen underlying species diversification, with several instances of selection only being detected when genetic covariances were taken into account. Therefore, this work directly links patterns of genetic covariation among traits to macroevolutionary patterns of morphological divergence. Our findings also suggest that the limited distribution ofMonodelphisspecies in morphospace is the result of a complex interplay between the limited dimensionality of available genetic variation and strong stabilizing selection along two major axes of genetic variation.
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影响因子:
2.9
作者:
FUNAKOSHI, T;HEIMARK, RL;FUJIKAWA, K
通讯作者:
FUJIKAWA, K
影响因子:
15.9
作者:
G. F. Lanchantin;A. G. Ware
通讯作者:
A. G. Ware
影响因子:
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作者:
J. Miletich;G. Broze;P. Majerus
通讯作者:
P. Majerus
影响因子:
7.5
作者:
T. Barrowcliffe;C. Eggleton
通讯作者:
C. Eggleton
影响因子:
15.9
作者:
G. Broze
通讯作者:
G. Broze