A bias caused by ectopic development produces sexually dimorphic sperm in nematodes.
A bias caused by ectopic development produces sexually dimorphic sperm in nematodes.
复制标题
DOI：
10.1016/j.cub.2011.07.034
复制
发表时间：
2011-08-23
期刊：
影响因子：
--
通讯作者：
Ellis RE
中科院分区：
文献类型：
--
作者：
Baldi C;Viviano J;Ellis RE
自花可育的雌雄同体在小杆线虫属中已经独立进化了好几次。这些XX雌雄同体的精子比雄性的小，它们用来使自己的卵母细胞受精。由于线虫中较大的精子比较小的精子竞争力强，因此人们认为这种二型性是对精子竞争的反应。然而，我们表明，这是由发展偏见造成的。当我们把C. remanei进入雌雄同体，他们的精子明显小于男性。因为这个物种在野外从来不会雌雄同体，所以这种二型性不可能是由于选择。相反，对相关线虫C.秀丽线虫表明，这种二型性可能反映了精子在雌雄同体性腺的不同生理环境中的发育。这些结果揭示了某些类型的发育偏差的新机制-新的物理位置的影响以可预测的方式改变异位细胞的发育。
Self-fertile hermaphrodites have evolved independently several times in the genus Caenorhabditis. These XX hermaphrodites make smaller sperm than males, which they use to fertilize their own oocytes. Since larger sperm outcompete smaller sperm in nematodes, it had been assumed that this dimorphism evolved in response to sperm competition. However, we show that it was instead caused by a developmental bias. When we transformed females of the species C. remanei into hermaphrodites, their sperm were significantly smaller than those of males. Because this species never makes hermaphrodites in the wild, this dimorphism cannot be due to selection. Instead, analyses of the related nematode C. elegans suggest that this dimorphism might reflect the development of sperm within the distinct physiological environment of the hermaphrodite gonad. These results reveal a new mechanism for some types of developmental bias — the effects of a novel physical location alter the development of ectopic cells in predictable ways.
登录
查看更多内容
影响因子：
11.8
作者：
Hill, RC;de Carvalho, CE;Haag, ES
通讯作者：
Haag, ES
DOI：
10.1098/rspb.2002.1996
发表时间：
2002-06-07
影响因子：
4.7
作者：
LaMunyon, CW;Ward, S
通讯作者：
Ward, S
DOI：
10.1111/j.2517-6161.1995.tb02031.x
发表时间：
1995-01-01
影响因子：
5.8
作者：
BENJAMINI, Y;HOCHBERG, Y
通讯作者：
HOCHBERG, Y
影响因子：
10.5
作者：
HODGKIN, J
通讯作者：
HODGKIN, J
影响因子：
56.9
作者：
Baldi, Chris;Cho, Soochin;Ellis, Ronald E.
通讯作者：
Ellis, Ronald E.