QUANTITATIVE GENETICS OF FITNESS TRAITS IN A WILD POPULATION OF PHLOX
QUANTITATIVE GENETICS OF FITNESS TRAITS IN A WILD POPULATION OF PHLOX
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福禄考野生种群健康性状的数量遗传学
DOI：
10.1111/j.1558-5646.1991.tb05275.x
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发表时间：
1991
期刊：
影响因子：
3.3
通讯作者：
D. Levin
中科院分区：
文献类型：
--
作者：
K. E. Schwaegerle;D. Levin
为了确定在一年生植物，福禄考，健身性状的进化是否受到缺乏遗传变异的限制，我们计算了16个性状在田间种群的遗传力和遗传相关。在温室中产生全同胞和半同胞种子家族，并种植回研究群体。在855颗发芽的种子中，有609颗存活下来并结出果实。对于每株植物，我们测量了几个方面的植物大小和三个组成部分的女性生殖力：产生的果实总数，每个果实的种子数，和质量的个别种子。各性状的遗传力在0.00~0.15之间。几个性状表现出显着水平的加性遗传方差，但我们没有发现证据的加性遗传方差的组成部分，女性生殖力和健身性状之间的负遗传相关的证据。这些结果表明，在这个群体中的进化将受到限制，缺乏遗传变异的健身性状。
To determine if the evolution of fitness traits in the annual plant, Phlox drummondii, is constrained by lack of genetic variation, we calculated the heritability and genetic correlation of 16 traits in a field population. Full‐ and half‐sib families of seeds were generated in the greenhouse and planted back into the study population. Of 855 seeds that germinated, 609 survived to produce fruit. For each plant we measured several aspects of plant size and three components of female fecundity: total number of fruits produced, number of seeds per fruit, and mass of individual seeds. Heritability of traits ranged from 0.00 to 0.15. Several traits showed significant levels of additive genetic variance, but we found no evidence of additive genetic variance in components of female fecundity and no evidence of negative genetic correlation between fitness traits. These results suggest that evolution in this population would be constrained by lack of heritable variation in fitness traits.