HERITABILITY OF NESTLING BEGGING INTENSITY IN THE HOUSE SPARROW (PASSER DOMESTICUS)
HERITABILITY OF NESTLING BEGGING INTENSITY IN THE HOUSE SPARROW (PASSER DOMESTICUS)
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DOI：
10.1111/j.1558-5646.2008.00598.x
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发表时间：
2009-03-01
期刊：
影响因子：
3.3
通讯作者：
Lotem, Arnon
中科院分区：
文献类型：
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作者：
Dor, Roi;Lotem, Arnon
亲子冲突的进化理论假设，后代的食物索取行为（称为乞讨）以及父母对乞讨的反应受到选择和共同进化的影响。这一假设意味着乞讨强度应该是可遗传的，至少在某种程度上是这样。尽管一些研究表明乞讨是可以遗传的，但这一点的证据很少，而且大多是间接的。为了评估乞讨的遗传力，我们使用了人工选择、同胞分析以及对四代交叉饲养的圈养麻雀雏鸟的乞讨强度的监测。我们还将乞讨的遗传力与已知在该物种中具有遗传性的形态特征的遗传力进行了对比。我们的结果表明，成年翅膀长度和体重是可遗传的，正如预期的那样。雏鸟乞讨的视觉和声音成分（以食物匮乏和体重标准化）的遗传力估计为低至中等，正如对一般行为特征的预期，并且低于先前报道的雀形目鸟类。我们的兄弟姐妹分析表明，共同环境对乞讨的影响比遗传起源的影响大得多，这表明乞讨进化可能受到基因与环境相互作用的强烈影响，可能是通过调整乞讨反应对环境和社会条件的机制。
Evolutionary theory of parent-offspring conflict assumes that offspring food solicitation behavior, known as begging, and parental response to begging are subjected to selection and coevolution. This assumption implies that begging intensity should be heritable, at least to some degree. Although some studies have suggested that begging is heritable, the evidence for this is rare and mostly indirect. To assess the heritability of begging we used artificial selection, sibling analysis, and the monitoring of begging intensity in four generations of cross-fostered captive house sparrow nestlings. We also contrasted the heritability of begging with that of morphological traits, known to be heritable in this species. Our results show that adult wing length and body mass were heritable as expected. The heritability estimates of the visual and vocal components of nestling begging (standardized for food deprivation and body mass) were low to moderate, as expected for behavioral traits in general, and lower than previously reported for passerine birds. Our sibling analysis shows that common environment had much greater effect on begging than genetic origin, suggesting that begging evolution may be strongly influenced by gene-environment interaction, probably through the mechanisms that adjust begging response to environmental and social conditions.