Divergent host plant preference causes assortative mating between sympatric host races of the ladybird beetle, Henosepilachna diekei
Divergent host plant preference causes assortative mating between sympatric host races of the ladybird beetle, Henosepilachna diekei
复制标题
不同的寄主植物偏好导致瓢虫同域寄主种族之间的选型交配
DOI：
--
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
H. Katakura
中科院分区：
文献类型：
--
作者：
K. Matsubayashi;S. Kahono;H. Katakura
不同的寄主偏好（即寄主忠诚度）在植食性昆虫的物种形成过程中起着重要的作用。然而，这种差异如何以及在多大程度上减少了种群之间的基因流动却很少被测量。在这里，我们估计的强度，仅由主机保真度在两个主机种族的植食性瓢虫瓢虫Henosepilachna diekei，专门对薇甘菊（菊科）和银合欢lavandulifolia（唇形科）在西爪哇，印度尼西亚引起的排斥性交配。这些主机比赛随机交配的情况下，在实验室条件下的寄主植物，但表现出几乎完全的竞争性交配，在田间笼子里的两个主机植物，花费几乎所有的时间在各自的主机植物。在田间笼中，寄主植物斑块结构并不显著影响其交配频率。这些结果表明，忠实于不同的寄主植物直接产生几乎完全的生殖隔离之间的主机种族限制各自的主机植物上的栖息地。此外，高寄主忠诚度也确保了雌虫在原寄主植物上产卵。由于幼虫不能在非宿主植物上存活，雌性产卵偏好和幼虫在甲虫特化的宿主植物上的表现之间的正相关将进一步促进宿主忠诚度的进化（© 2013 The Linnean Society of伦敦，Biological Journal of the Linnean Society，2013，110，606-614）。
Divergent host preference (i.e. host fidelity) plays a significant role in the speciation process in phytophagous insects. However, how and to what extent this divergence reduces gene flow between populations has rarely been measured. Here, we estimated the intensity of assortative mating caused solely by host fidelity in two host races of the phytophagous ladybird beetle Henosepilachna diekei, specialized on Mikania micrantha (Asteraceae) and Leucas lavandulifolia (Lamiaceae) in West Java, Indonesia. These host races mated randomly in the absence of host plants under laboratory conditions, but demonstrated nearly complete assortative mating in field cages with the two host plants, by spending almost all of their time on their respective host plants. The frequency of assortative mating in the field cages was not affected drastically by host plant patch structure. These results suggest that fidelity to the different host plants yields directly almost complete reproductive isolation between the host races by limiting the habitat on the respective host plant. In addition, the high host fidelity also ensures female oviposition on the original host plant. As larvae cannot survive on non-host plants, a positive association between female oviposition preference and larval performance on the host plant on which the beetles are specialized will further facilitate the evolution of host fidelity. © 2013 The Linnean Society of London, Biological Journal of the Linnean Society, 2013, 110, 606–614.
影响因子：
16.8
作者：
Giraud T;Gladieux P;Gavrilets S
通讯作者：
Gavrilets S