Hegde S N, Krishna M S
Department of Studies in Zoology, University of Mysore, India.
Indian J Exp Biol. 1996 May;34(5):440-3.
Effect of bottleneck sizes, on sexual isolation, mating speed and fertility were studied in D. malerkotliana established from natural population. After 10 generations of laboratory breeding, flies showed incipient sexual isolation between control line and some bottleneck lines and also between bottleneck lines. These findings do not fully agree with the general assumption that the establishment of bottlenecks accelerates speciation. The courtship latency and mating speed increases with increasing size of bottlenecks whereas copulation duration and fertility decreases with increasing bottleneck size. There was no sign of rebounding in fitness with in 10 generations as observed by Bryant et al. in house flies.
在从自然种群建立的马勒果蝇中，研究了瓶颈大小对性隔离、交配速度和生育力的影响。经过10代实验室培育后，果蝇在对照品系与一些瓶颈品系之间以及瓶颈品系之间表现出初期性隔离。这些发现并不完全符合瓶颈的建立会加速物种形成的一般假设。求偶潜伏期和交配速度随着瓶颈大小的增加而增加，而交配持续时间和生育力则随着瓶颈大小的增加而降低。与布莱恩特等人在家蝇中观察到的情况不同，在10代内没有适应度反弹的迹象。
