THE DISPOSITION AND GENETIC DIVERSITY OF STORED SPERM IN FEMALES OF THE DAMSELFLY CALOPTERYX SPLENDENS XANTHOSTOMA (CHARPENTIER)
THE DISPOSITION AND GENETIC DIVERSITY OF STORED SPERM IN FEMALES OF THE DAMSELFLY CALOPTERYX SPLENDENS XANTHOSTOMA (CHARPENTIER)
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DOI：
10.1098/rspb.1995.0046
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发表时间：
1995-03-22
影响因子：
4.7
通讯作者：
HOOPER, RE
中科院分区：
文献类型：
--
作者：
SIVAJOTHY, MT;HOOPER, RE
雌性黄口鸟有独立的精子储存器官，并通过两种方式之一来确保产卵：雌性要么与随后在产卵时保护她的雄性交配（MAG），要么雌性可以在不与居住的雄性交配（site）的情况下确保进入产卵地点。随机扩增多态性DNA （RAPD）分析表明，精子储存库中精子的遗传多样性高于性交囊内精子。雄性在交配过程中不能从精囊中取出精子，我们认为精囊可能是前配偶精子的精子储存库。进行SAG产卵的雌性比MAG产卵的雌性储存的精子具有更高的遗传多样性。我们认为，获得产卵地点而不留下的雌性有可能在产卵期间行使交配后选择，基于：(i)观察到的精子优先模式在其他蝶类；（ii）储存精子的遗传多样性的变化；（iii）避免在SAG雌性中再次繁殖。
Female Calopteryx splendens xanthostoma have discrete sperm storage organs and secure oviposition in one of two ways: a female either mates with a male who subsequently guards her whilst she oviposits (MAG), or females can secure access to an oviposition site without copulating with the resident male (site). Random amplified polymorphic DNA (RAPD) analysis of the genetic diversity of sperm from individual sperm storage organs revealed that the spermathecae contained sperm of a greater genetic diversity than sperm in the bursa copulatrix. Males cannot remove sperm from the spermathecae during copulation, and we propose that the spermathecae might function as a sperm cache for the sperm of previous mates. Females that conduct SAG ovipositions have a higher genetic diversity of stored sperm than MAG females. We suggest that females which gain access to oviposition sites without remating have the potential to exercise postcopulatory choice during oviposition, on the basis of: (i) the observed patterns of sperm precedence in other calopterygids; (ii) the variation in genetic diversity of stored sperm; and (iii) the avoidance of recopulation in SAG females.