Poisson distribution of male mating success in laboratory populations of Drosophila melanogaster.
Poisson distribution of male mating success in laboratory populations of Drosophila melanogaster.
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果蝇实验室种群雄性交配成功率的泊松分布。
DOI：
10.1017/s0016672399003730
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
Mueller,LD
中科院分区：
文献类型：
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作者：
Joshi,A;Do,MH;Mueller,LD
雄性和雌性在繁殖成功方面的差异是有效种群规模的主要决定因素。然而，大多数关于果蝇雄性交配成功的研究都是在与典型培养条件非常不同的条件下进行的。我们在五个实验室种群中测定了雄性交配成功率的分布。黑腹果蝇维持在14天的离散世代周期上，相当代表标准果蝇培养物。交配成功率是指在接近这些种群的常规培养瓶的条件下，雄性可以达到的交配数量。初步研究确定，在这些人群中的大多数交配发生在苍蝇达到性成熟的14小时内。因此，用白色油漆在个体未交配雄性的胸部标记，将其放入装有不同数量的未标记的两种性别未交配果蝇的小瓶中，并在长达14 h的时间内连续监测交配情况。在试验期间的不同时间，将未交配的雄性和雌性以模拟培养瓶中羽化模式的比例加入这些小瓶中。在5个种群中观察到的每只雄性交配次数的变化基本上符合泊松分布，表明在短世代时间、离散世代的实验室培养的D.黑腹果蝇可能满足有限种群中遗传漂变的Wright-Fisher模型的基本假设。
Variation among males and females in reproductive success is a major determinant of effective population size. Most studies of male mating success in Drosophila, however, have been done under conditions very different from those in typical cultures. We determined the distribution of male mating success in five laboratory populations of D. melanogaster maintained on a 14 d, discrete generation cycle fairly representative of standard Drosophila cultures. Mating success was measured as the number of matings a male could achieve under conditions closely approximating a regular culture vial of these populations. Preliminary studies determined that most mating in these populations occurred within 14 h of the flies attaining sexual maturity. Consequently, individual virgin males were marked with white paint on their thorax, put into vials with varying numbers of unmarked virgin flies of both sexes, and monitored continuously for matings over a period of up to 14 h. At various times during the assay, virgin males and females were added to these vials in proportions simulating the pattern of eclosion in culture vials. The observed variation in the number of matings per male in the five populations was, by and large, consistent with a Poisson distribution, suggesting that male mating success in short-generation-time, discrete-generation laboratory cultures of D. melanogaster may fulfil a fundamental assumption of the Wright–Fisher model of genetic drift in finite populations.