Spodoptera frugiperda (Lepidoptera: Noctuidae) host-plant variants: two host strains or two distinct species?
Spodoptera frugiperda (Lepidoptera: Noctuidae) host-plant variants: two host strains or two distinct species?
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DOI：
10.1007/s10709-015-9829-2
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发表时间：
2015-06
期刊：
影响因子：
1.5
通讯作者：
d'Alençon E
中科院分区：
文献类型：
--
作者：
Dumas P;Legeai F;Lemaitre C;Scaon E;Orsucci M;Labadie K;Gimenez S;Clamens AL;Henri H;Vavre F;Aury JM;Fournier P;Kergoat GJ;d'Alençon E
草地贪夜蛾（Spodoptera frugiperda）是美洲各地众所周知的农作物害虫，它由适应不同寄主植物的两个品系组成：第一个品系优先以玉米、棉花和高粱为食，而第二个品系与水稻和几种牧草更相关。虽然形态上难以区分，他们表现出不同的交配行为，信息素成分，并显示根据寄主植物的发展变化。虽然后者表明这两种菌株是不同的物种，但这个问题仍然存在很大争议，因为杂交种在野外自然发生，更不用说两种菌株之间关于交配成功的已发表结果之间的差异。为了明确两株S.通过对frugiperda两个亲本株系减数分裂的比较，我们分析了可能反映合子后分离水平的特征：（1）第一代（F1）杂种的致死性和不育性;（2）与两个亲本株系的减数分裂相比，第二代（F2）杂种的减数分裂分离模式。我们发现F1在杂交的一个方向上的交配成功率显着降低，并且高水平的微卫星标记显示F2后代的传递比失真。我们的研究结果支持两个实验室菌株之间存在合子后生殖隔离，并与从现场收集的两个菌株的个体之间恢复的显著遗传分化水平一致。总之，这些结果提供了额外的证据，有利于兄弟物种状态的两个菌株。本文的在线版本（doi：10.1007/s10709-015-9829-2）包含补充材料，可供授权用户使用。
The moth Spodoptera frugiperda is a well-known pest of crops throughout the Americas, which consists of two strains adapted to different host-plants: the first feeds preferentially on corn, cotton and sorghum whereas the second is more associated with rice and several pasture grasses. Though morphologically indistinguishable, they exhibit differences in their mating behavior, pheromone compositions, and show development variability according to the host-plant. Though the latter suggest that both strains are different species, this issue is still highly controversial because hybrids naturally occur in the wild, not to mention the discrepancies among published results concerning mating success between the two strains. In order to clarify the status of the two host-plant strains of S. frugiperda, we analyze features that possibly reflect the level of post-zygotic isolation: (1) first generation (F1) hybrid lethality and sterility; (2) patterns of meiotic segregation of hybrids in reciprocal second generation (F2), as compared to the meiosis of the two parental strains. We found a significant reduction of mating success in F1 in one direction of the cross and a high level of microsatellite markers showing transmission ratio distortion in the F2 progeny. Our results support the existence of post-zygotic reproductive isolation between the two laboratory strains and are in accordance with the marked level of genetic differentiation that was recovered between individuals of the two strains collected from the field. Altogether these results provide additional evidence in favor of a sibling species status for the two strains. The online version of this article (doi:10.1007/s10709-015-9829-2) contains supplementary material, which is available to authorized users.
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影响因子：
6.5
作者：
De Queiroz, Kevin
通讯作者：
De Queiroz, Kevin
影响因子：
7.7
作者：
Arias, M. C.;Arnoux, E.;Zhu, Lili
通讯作者：
Zhu, Lili
DOI：
10.1073/pnas.172510699
发表时间：
2002-10-15
影响因子：
11.1
作者：
Britten, RJ
通讯作者：
Britten, RJ
影响因子：
3.3
作者：
Hall, MC;Willis, JH
通讯作者：
Willis, JH
影响因子：
1.3
作者：
Cordaux R;Pichon S;Hatira HB;Doublet V;Grève P;Marcadé I;Braquart-Varnier C;Souty-Grosset C;Charfi-Cheikhrouha F;Bouchon D
通讯作者：
Bouchon D