Generation-based life table analysis reveals manifold effects of inbreeding on the population fitness in Plutella xylostella.
Generation-based life table analysis reveals manifold effects of inbreeding on the population fitness in Plutella xylostella.
复制标题
基于世代的生命表分析揭示了近亲繁殖对小菜蛾种群适应性的多重影响
DOI：
10.1038/srep12749
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发表时间：
2015-07-31
影响因子：
4.6
通讯作者：
You M
中科院分区：
文献类型：
--
作者：
Peng L;Zou M;Ren N;Xie M;Vasseur L;Yang Y;He W;Yang G;Gurr GM;Hou Y;You S;You M
了解近亲繁殖如何影响健康对于保护和害虫管理具有重要的生物学意义。尽管小菜蛾是世界范围内许多重要十字花科作物的害虫，但近交对小菜蛾 (Plutella xylostella (L.)) 种群的影响目前尚不清楚。使用特定年龄阶段的生命表，我们量化了近亲繁殖对小菜蛾健康相关性状和人口统计参数的影响。随着时间的推移，自交系的卵孵化率、存活率和繁殖力与远交系相比显着下降。小菜蛾自交系表现出显着较低的内在增长率（r）、净繁殖率（R0）和有限增长率（λ）以及增加的世代时间（T）。近交效应随发育阶段的不同而变化，近交持续时间可能会对适应性相关性状产生深远影响。我们的工作为进一步研究小菜蛾近交衰退的分子和遗传基础奠定了基础。
Understanding how inbreeding affects fitness is biologically important for conservation and pest management. Despite being a worldwide pest of many economically important cruciferous crops, the influence of inbreeding on diamondback moth, Plutella xylostella (L.), populations is currently unknown. Using age-stage-specific life tables, we quantified the inbreeding effects on fitness-related traits and demographic parameters of P. xylostella. Egg hatching rate, survival and fecundity of the inbred line significantly declined compared to those of the outbred line over time. The inbred P. xylostella line showed significantly lower intrinsic rate of increase (r), net reproduction rate (R0) and finite increase rate (λ) and increasing generation time (T). Inbreeding effects vary with developmental stages and the fitness-related traits can be profoundly affected by the duration of inbreeding. Our work provides a foundation for further studies on molecular and genetic bases of the inbreeding depression for P. xylostella.