Heritability of resistance to oxidative stress in early life
Heritability of resistance to oxidative stress in early life
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DOI：
10.1111/j.1420-9101.2010.01942.x
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发表时间：
2010-04-01
影响因子：
2.1
通讯作者：
Velando, A.
中科院分区：
文献类型：
--
作者：
Kim, S. -Y.;Noguera, J. C.;Velando, A.
近年来，氧化应激被认为在生活史进化中起着重要的作用，但对这一生理特性的自然变异和遗传能力知之甚少。在这里，我们探讨的表型变异抗氧化应激的交叉寄养黄腿鸥（Larus cachinnans）小鸡。抗氧化应激是不相关的血浆抗氧化剂在孵化，这主要是来自母体投资到鸡蛋。常见的环境效应对氧化胁迫抗性表型变异的影响并不显著。孵化雏鸡的遗传力相对较低且不显著，但有趣的是，8日龄雏鸡表现出高且显著的遗传力（h2 = 0.59）。我们的研究结果表明，抗氧化应激主要是由基因型作为雏鸡生长。需要进一步的工作来探索氧化应激在生活史进化中的遗传作用。
Oxidative stress has recently been suggested to play an important role in life-history evolution, but little is known about natural variation and heritability of this physiological trait. Here, we explore phenotypic variation in resistance to oxidative stress of cross-fostered yellow-legged gull (Larus cachinnans) chicks. Resistance to oxidative stress was not related to plasma antioxidants at hatching, which are mostly derived from maternal investment into eggs. Common environmental effects on phenotypic variation in resistance to oxidative stress were not significant. Heritability was relatively low and nonsignificant in hatchlings, but interestingly, the chicks of age 8 days showed high and significant heritability (h2 = 0.59). Our results suggest that resistance to oxidative stress is determined mainly by the genotype as chicks grow. Further work is required to explore the genetic role of oxidative stress in life-history evolution.