Incipient speciation in the flour beetle, Tribolium confusum: premating isolation between natural populations.
Incipient speciation in the flour beetle, Tribolium confusum: premating isolation between natural populations.
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面粉甲虫的早期物种形成，混淆谷盗：自然种群之间的交配前隔离。
DOI：
10.1038/hdy.1995.161
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发表时间：
1995
期刊：
影响因子：
3.8
通讯作者：
McNaughton,M
中科院分区：
文献类型：
--
作者：
Wade,MJ;Chang,NW;McNaughton,M
我们报道了在尼日利亚卡杜纳和克罗地亚萨格勒布采集的粉甲的两个自然种群之间存在部分生殖隔离。当来自任何一个种群的雌性与单一的同域或异地雄性配对时，她会产生接近正常数量的半生育后代。然而，当雌性与异地雄性和同域雄性繁衍交配时，同域雄性繁衍出绝大多数后代。当以后代数量衡量时，异位雄性与尼日利亚女性的平均相对适合度为0.425，与克罗地亚女性的平均相对适合度为0.085。因此，生殖隔离是互惠但不对称的。行为学观察表明，异地雄性的交配尝试只有一小部分成功，因为当异地雄性骑上雌性时，雌性不会经常变得静止。最重要的隔离也是相互的，但不对称：尼日利亚女性比克罗地亚女性更容易接受异型男性作为配偶。这两个种群之间的前合子行为隔离不同于该属另外两个种之间观察到的后交配前合子隔离。此外，种群间杂交种是可育的，尽管它们表现出微弱的雌性偏见。
We report the existence of partial reproductive isolation between two natural populations of the flour beetle, Tribolium confusum, collected in Kaduna, Nigeria and Zagreb, Croatia. When a female from either population is paired with a single sympatric or allopatric male, she produces near normal numbers of semifertile offspring. However, when females are multiply mated with allopatric and sympatric males, the sympatric males sire the large majority of offspring. When measured in offspring numbers, the mean relative fitness of allopatric males is 0.425 with Nigerian females and 0.085 with Croatian females. Thus, the reproductive isolation is reciprocal but asymmetric. Behavioural observations indicate that only a fraction of mating attempts by allopatric males are successful because females do not become quiescent as often when mounted by allopatric males. The premating isolation is also reciprocal but asymmetric: Nigerian females are more accepting of allopatric males as mates than are Croatian females. The prezygotic behavioural isolation between these two populations is different from the postmating, prezygotic isolation observed between two other species in the genus, T. castaneum and T. freemani. Furthermore, the T. confusum interpopulation hybrids are fertile although they exhibit a weak female bias.