雌性繁殖力和雄性交配成功率对拟暗果蝇生育力选择的相对影响。
Relative effects of female fecundity and male mating success on fertility selection in Drosophila pseudoobscura.
作者信息
Brockett M M, Alavi H, Anderson W W
机构信息
Department of Genetics, University of Georgia, Athens 30602-7223, USA.
出版信息
Proc Natl Acad Sci U S A. 1996 Apr 2;93(7):3080-2. doi: 10.1073/pnas.93.7.3080.
The fertility component of natural selection acting on chromosomal inversions in two experimental populations of Drosophila pseudoobscura was subdivided into the effects of female fecundity and male mating success. The offspring of the three female genotypes could be distinguished by their mitochondrial DNA haplotypes, thus permitting a direct measurement of the relative fecundities of the female genotype. The effects of male mating success on inversion frequency were measured by comparing inversion frequencies in parents and their offspring. Selection by fertility caused significant changes in inversion frequency in both populations. In one population, the changes in inversion frequency due to female fecundity and to male mating success were comparable. In the other population, however, the changes in inversion frequency due to male mating success were considerably larger than those due to female fecundity. The difference between the two populations underscores the intrinsic variability of the fertility component of fitness.
在两个实验性的拟暗果蝇种群中，作用于染色体倒位的自然选择的生育力成分被细分为雌性繁殖力和雄性交配成功率的影响。三种雌性基因型的后代可以通过它们的线粒体DNA单倍型来区分，从而可以直接测量雌性基因型的相对繁殖力。通过比较亲本及其后代的倒位频率，测量了雄性交配成功率对倒位频率的影响。生育力选择导致两个种群的倒位频率都发生了显著变化。在一个种群中，由于雌性繁殖力和雄性交配成功率导致的倒位频率变化相当。然而，在另一个种群中，由于雄性交配成功率导致的倒位频率变化远大于由于雌性繁殖力导致的变化。两个种群之间的差异突出了适合度生育力成分的内在变异性。
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