Snook R R
Department of Biology, Arizona State University, Tempe, Arizona, 85287-1501.
Evolution. 1998 Feb;52(1):266-269. doi: 10.1111/j.1558-5646.1998.tb05161.x.
Subspecies of Drosophila pseudoobscura, one occurring in the United States and the other in Bogota, Columbia, exhibit Haldane's Rule in one direction of the cross. Additionally, D. pseudoobscura produces two sperm types: short, sterile sperm and long, fertile, sperm. Here I examine the relationship between the production of short and long sperm and hybrid sterility. Fertile and sterile hybrid males produce a greater proportion of short sperm compared to parental males with sterile hybrids producing mainly short, immotile sperm. Sperm transfer and storage patterns were similar between fertile hybrid and parental strains; and unexpectedly, short, immotile sperm from sterile hybrids were stored. These findings raise the question of whether different genetic mechanisms disrupt both sperm heteromorphic production and sperm motility and whether this indicates that females exert some control over sperm storage.
拟暗果蝇的亚种，一种出现在美国，另一种在哥伦比亚的波哥大，在杂交的一个方向上表现出霍尔丹法则。此外，拟暗果蝇产生两种精子类型：短的、不育的精子和长的、可育的精子。在这里，我研究了短精子和长精子的产生与杂种不育之间的关系。与亲代雄性相比，可育和不育的杂种雄性产生的短精子比例更高，不育杂种主要产生短的、不动的精子。可育杂种和亲代菌株之间的精子转移和储存模式相似；出乎意料的是，不育杂种的短的、不动的精子被储存了下来。这些发现提出了一个问题，即不同的遗传机制是否会破坏精子异形产生和精子活力，以及这是否表明雌性对精子储存有一定的控制作用。
