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单性生殖

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中间为单性生殖的只有雌性个体的物种新墨西哥鞭尾蜥(Cnemidophorus neomexicanus),两边为有性生殖的物种,左为雄性小斑纹鞭尾蜥(C. inornatus),右为雌性西部鞭尾蜥(C. tigris)。新墨西哥鞭尾蜥为二者自然杂交产生的物种。

单性生殖,又称为孤雌生殖(Parthenogenesis),是雌性动物植物卵子,不经过受精过程,而单独发育成后代的生殖方式,属于无性生殖,但仍与一般无性生殖稍有区别。

单性生殖一般发生在多种植物无脊椎动物中,但也有一些脊椎动物如某些爬行动物[1](如钩盲蛇红尾蚺科摩多巨蜥哀鳞趾虎、新墨西哥鞭尾蜥),在一些特殊的鸟类[2]加州神鹫[3][4])和鲨鱼物种(如窄头双髻鲨条纹斑竹鲨黑边鳍真鲨)中也会出现[5]。如水蚤蜜蜂蒲公英和一些禾类中,这些现象为“天然单性生殖”,人为的刺激未受精卵发育,成为“人工单性生殖”,曾经实验过将青蛙番茄等成功地进行单性生殖,可以完整地保留母体性状。雄性小火蚁是唯一不须与雌性基因结合,可以繁殖自身后代的雄性物种。北美甚至变异出可以向其他雄性提取片段基因或单条染色体用来丰富自己后代基因多样性的孤雌生殖钝口螈。

产雄孤雌生殖

单性生殖的后代如果全为雄性,称为“产雄单性生殖”或“产雄孤雌生殖”,例如蜜蜂产育雄蜂秋季后的蚜虫繁殖,就是一种产雄单性生殖,科莫多龙亦然;如果后代全为雌性,称为“产雌单性生殖”或“产雌孤雄生殖”,例如夏季蚜虫繁殖,新墨西哥鞭尾蜥的繁殖等。

注释

  1. ^ Halliday, Tim R.; Kraig Adler (eds.). Reptiles & Amphibians. Torstar Books. 1986: p. 101. ISBN 0-920269-81-8. 
  2. ^ Savage, Thomas F. A Guide to the Recognition of Parthenogenesis in Incubated Turkey Eggs. Oregon State University. September 12, 2005 [2006-10-11]. (原始内容存档于2017-12-06). 
  3. ^ 奇客Solidot | 濒临灭绝的鸟类首次被发现单性生殖. www.solidot.org. [2021-12-07]. (原始内容存档于2021-12-07). 
  4. ^ Endangered birds experience 'virgin birth,' a first for the species. Animals. 2021-10-28 [2021-12-07]. (原始内容存档于2022-02-07) (英语). 
  5. ^ "Female Sharks Can Reproduce Alone, Researchers Find"页面存档备份,存于互联网档案馆), Washington Post, Wednesday, May 23, 2007; Page A02

参考文献

  • Dawley, Robert M. & Bogart, James P. (1989). Evolution and Ecology of Unisexual Vertebrates. Albany, New York: New York State Museum. ISBN 1-55557-179-4.
  • Fangerau H. (2005). Can Artificial Parthenogenesis sidestep ethical pitfalls in human therapeutic cloning? A historical perspective, Journal of Medical Ethics 31, 733-735
  • Futuyma, Douglas J. & Slatkin, Montgomery. (1983). Coevolution. Sunderland, Mass: Sinauer Associates. ISBN 0-87893-228-3.
  • Timothy A. Hore, Robert W. Rapkins, Jennifer A. Marshall Graves. Construction and evolution of imprinted loci in mammals. Trends in Genetics: 440–448. [2018-04-02]. doi:10.1016/j.tig.2007.07.003. (原始内容存档于2022-03-29). 
  • Maynard Smith, John. (1978). The Evolution of Sex. Cambridge: Cambridge University Press. ISBN 0-521-29302-2.
  • Michod, Richard E. & Levin, Bruce R. (1988). The Evolution of Sex. Sunderland, Mass: Sinauer Associates. ISBN 0-87893-459-6.
  • Phillip C. Watts, Kevin R. Buley, Stephanie Sanderson, Wayne Boardman, Claudio Ciofi and Richard Gibson. (2006). Parthenogenesis in Komodo dragons. Nature 444, 1021-1022
  • Schlupp, I. (2005) The evolutionary ecology of gynogenesis. Annu. Rev. Ecol. Evol. Syst. 36: 399-417.
  • Simon, Jean-Christophe, Rispe, Claude & Sunnucks, Paul. (2002). Ecology and evolution of sex in aphids. Trends in Ecology & Evolution, 17, 34-39.
  • Stearns, Stephan C. (1988). The Evolution of Sex and Its Consequences (Experientia Supplementum, Vol. 55). Boston: Birkhauser. ISBN 0-8176-1807-4.

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单性生殖
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