Bogart J P, Elinson R P, Licht L E
Department of Zoology, College of Biological Science, University of Guelph, Ontario, Canada.
Science. 1989 Nov 24;246(4933):1032-4. doi: 10.1126/science.2587986.
Although most animals reproduce sexually, a number of all-female groups exist. Triploid hybrid salamanders appear to maintain themselves by using a male's sperm to activate their eggs, after which the sperm nucleus is eliminated (gynogenesis). The incidence of sperm nuclear incorporation in eggs of these salamanders depends on temperature. Triploid offspring derived gynogenetically are more frequent at lower temperature, whereas tetraploid offspring derived sexually are far more frequent at higher temperatures. Temperature-dependent variability in sperm nuclear incorporation helps explain the variability in reproductive modes reported for hybrid salamanders.
尽管大多数动物通过有性生殖繁殖，但仍存在一些全雌性群体。三倍体杂交蝾螈似乎通过利用雄性的精子激活它们的卵子来维持自身，之后精子核被消除（雌核发育）。这些蝾螈卵子中精子核并入的发生率取决于温度。在较低温度下，通过雌核发育产生的三倍体后代更为常见，而在较高温度下，通过有性生殖产生的四倍体后代则更为常见。精子核并入中温度依赖性的变异性有助于解释杂交蝾螈所报道的生殖模式的变异性。
