Cobb Matthew, Burnet Barrie, Blizard Robert, Jallon Jean-Marc
Laboratoire de Biologie et Génétique Evolutives, CNRS, 91198, Gif-sur-Yvette, FRANCE.
Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, S10 2TN, ENGLAND.
Evolution. 1990 Dec;44(8):2057-2068. doi: 10.1111/j.1558-5646.1990.tb04311.x.
Mating behavior was studied in two laboratory populations of Drosophila sechellia and their reciprocal hybrids. The ancestral population was reared on a special medium, optimal for this species, while the derived population was reared on a standard Drosophila food, and underwent a bottleneck while adapting to this new medium, in a manner similar to the "founder-flush" process of Carson (1971). A significant tendency towards mating asymmetry was found, with ancestral females mating significantly less frequently with derived males than derived females with ancestral males. Analysis of hybrids suggested an important role for the male's X chromosome or for a maternal effect. No significant differences were found among parental types for their main female cuticular hydrocarbons, the proportion of courtship spent in various behavioral elements, body weight, or wing length. Significant differences were found in the structure of courtship, male locomotor activity, male cuticular hydrocarbon levels, and male courtship song inter-pulse interval (i.p.i.). None of these differences showed an X-linked effect in the reciprocal hybrids. Hypotheses put forward to explain interspecific mating asymmetries are discussed in the light of these results.
在两个实验室培养的塞舌尔果蝇种群及其正反交杂种中研究了交配行为。原始种群在对该物种最优的特殊培养基上饲养，而衍生种群在标准果蝇食物上饲养，并在适应这种新培养基时经历了瓶颈期，其方式类似于卡森（1971年）提出的“奠基者-扩张”过程。发现了显著的交配不对称倾向，即原始雌性与衍生雄性的交配频率显著低于衍生雌性与原始雄性的交配频率。对杂种的分析表明雄性X染色体或母体效应起重要作用。在亲本类型之间，其主要雌性表皮碳氢化合物、在各种行为元素中求偶所花费的比例、体重或翅长均未发现显著差异。在求偶结构、雄性运动活性、雄性表皮碳氢化合物水平和雄性求偶歌的脉冲间期（i.p.i.）方面发现了显著差异。在正反交杂种中，这些差异均未表现出X连锁效应。根据这些结果讨论了解释种间交配不对称的假说。
