丽蝇蛹集金小蜂性别比例的遗传变异。
Genetic variation for the sex ratio in Nasonia vitripennis.
作者信息
Parker E D, Orzack S H
出版信息
Genetics. 1985 May;110(1):93-105. doi: 10.1093/genetics/110.1.93.
We detected genetic variation for the sex ratio in the parasitoid wasp Nasonia vitripennis by analysis of inbred lines and with an artificial selection experiment. Sex ratios differed significantly among five independently isolated lines. Furthermore, sex ratio in broods produced by single females in single hosts shifted from 80-90% female to 50-55% female in 13 to 15 generations in each of two replicate selection lines. The final sex ratios of both selection lines were significantly lower than any of the inbred line sex ratios. Backcrosses revealed that the selection response was due to nuclear genes acting through the female parent. In light of known facultative sex ratio behavior and major genes affecting sex ratio in Nasonia, our results suggest that population and individual sex ratios in this species are molded by processes at both genetic and behavioral levels.
我们通过对近交系的分析和一项人工选择实验，检测了丽蝇蛹集金小蜂（Nasonia vitripennis）性别的遗传变异。在五个独立分离的品系中，性别比例存在显著差异。此外，在两个重复选择品系中，单只雌蜂在单个寄主中产下的子代性别比例在13至15代中从80 - 90%的雌性转变为50 - 55%的雌性。两个选择品系的最终性别比例均显著低于任何一个近交系的性别比例。回交实验表明，选择反应是由于核基因通过雌性亲本起作用。鉴于丽蝇蛹集金小蜂已知的兼性性别比例行为以及影响性别的主要基因，我们的结果表明，该物种的种群和个体性别比例是由遗传和行为层面的过程塑造的。
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