Pitnick Scott, Marrow Therese, Spicer Greg S
Department of Biology, Syracuse University, 108 College Place, Syracuse, New York, 13244-1270.
Department of Zoology, Arizona State University, Tempe, Arizona, 85287-1501.
Evolution. 1999 Dec;53(6):1804-1822. doi: 10.1111/j.1558-5646.1999.tb04564.x.
Females of all species belonging to the family Drosophilidae have two kinds of sperm-storage organs: paired spherical spermathecae and a single elongate tubular seminal receptacle. We examined 113 species belonging to the genus Drosophila and closely allied genera and describe variation in female sperm-storage organ use and morphology. The macroevolutionary pattern of organ dysfunction and morphological divergence suggests that ancestrally both kinds of organs stored sperm. Loss of use of the spermathecae has evolved at least 13 times; evolutionary regain of spermathecal function has rarely if ever occurred. Loss of use of the seminal receptacle has likely occurred only once; in this case, all descendant species possess unusually elaborate spermathecae. Data further indicate that the seminal receptacle is the primary sperm-storage organ in Drosophila. This organ exhibits a pattern of strong correlated evolution with the length of sperm. The evolution of multiple kinds of female sperm-storage organs and the rapidly divergent and correlated evolution of sperm and female reproductive tract morphology are discussed.
成对的球形受精囊和单个细长的管状受精囊。我们研究了果蝇属及相近属的113个物种，并描述了雌性精子储存器官使用和形态的变化。器官功能障碍和形态差异的宏观进化模式表明，在祖先状态下，这两种器官都储存精子。受精囊使用功能的丧失至少进化了13次；受精囊功能的进化恢复极少发生，如果曾经发生过的话。受精囊使用功能的丧失可能只发生过一次；在这种情况下，所有后代物种都拥有异常精致的受精囊。数据进一步表明，受精囊是果蝇中的主要精子储存器官。该器官表现出与精子长度强烈的协同进化模式。文中讨论了多种雌性精子储存器官的进化以及精子与雌性生殖道形态的快速分化和协同进化。
