Intergenerational effects of inbreeding in Nicrophorus vespilloides: offspring suffer fitness costs when either they or their parents are inbred.
Intergenerational effects of inbreeding in Nicrophorus vespilloides: offspring suffer fitness costs when either they or their parents are inbred.
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Nicrophorus vespilloides 近亲繁殖的代际效应：当后代或其父母近亲繁殖时，后代会遭受健康成本。
DOI：
10.1111/jeb.12102
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发表时间：
2013
影响因子：
2.1
通讯作者：
Mattey SN
中科院分区：
文献类型：
--
作者：
Mattey SN
近亲繁殖衰退是由相关个体之间的交配引起的适应性降低。当后代本身是近亲繁殖时，近亲繁殖预计会导致后代适应性的降低，但远交个体在依赖近亲繁殖父母的照顾时也可能遭受适应性的降低。目前，人们对近亲繁殖的这种代际影响的意义知之甚少。在这里，我们报告了两个实验埋葬beetleNicrophorus vespilloides，昆虫精心的父母照顾，在其中，我们调查了近亲繁殖的后代抑郁症时，无论是后代本身或他们的父母是近亲繁殖。我们发现大量的近亲繁殖抑郁症时，后代是近亲繁殖，包括减少孵化成功的近亲繁殖的鸡蛋和生存的近亲繁殖后代。我们还发现了大量的近亲繁殖抑郁症时，父母是近亲繁殖，包括减少孵化成功的鸡蛋产生的近亲繁殖的父母和生存的远交后代，得到照顾的近亲繁殖的父母。我们的研究结果表明，近亲繁殖的代际效应可能会对后代产生巨大的健康成本，未来的研究需要将这些成本纳入其中，以获得对近亲繁殖抑郁症的准确估计。
Inbreeding depression is the reduction in fitness caused by mating between related individuals. Inbreeding is expected to cause a reduction in offspring fitness when the offspring themselves are inbred, but outbred individuals may also suffer a reduction in fitness when they depend on care from inbred parents. At present, little is known about the significance of such intergenerational effects of inbreeding. Here, we report two experiments on the burying beetleNicrophorus vespilloides, an insect with elaborate parental care, in which we investigated inbreeding depression in offspring when either the offspring themselves or their parents were inbred. We found substantial inbreeding depression when offspring were inbred, including reductions in hatching success of inbred eggs and survival of inbred offspring. We also found substantial inbreeding depression when parents were inbred, including reductions in hatching success of eggs produced by inbred parents and survival of outbred offspring that received care from inbred parents. Our results suggest that intergenerational effects of inbreeding can have substantial fitness costs to offspring, and that future studies need to incorporate such costs to obtain accurate estimates of inbreeding depression.