Evolution of elaborate parental care: phenotypic and genetic correlations between parent and offspring traits.
Evolution of elaborate parental care: phenotypic and genetic correlations between parent and offspring traits.
复制标题
精致的父母护理的进化：父母和后代性状之间的表型和遗传相关性。
DOI：
10.1093/beheco/arw129
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发表时间：
2017-01
期刊：
影响因子：
--
通讯作者：
Smiseth PT
中科院分区：
文献类型：
--
作者：
Andrews CP;Kruuk LE;Smiseth PT
虽然父母照顾的演变是行为生态学的一个中心话题，但我们对复杂形式的照顾是如何演变的知之甚少。我们研究了埋葬甲虫对父母的精心照料。我们的结果表明，雌性在亲本质量上存在差异，一些亲本行为促进了后代的生长，而另一些亲本行为提高了后代的存活率，亲子行为几乎没有遗传差异。推特：@Permiseth精心设计的父母照料方式的进化是行为生态学中的一个重要话题，但人们对影响父母和后代特征复杂系列进化的因素知之甚少。在这里，我们使用多变量数量遗传方法来研究夜蛾亲代和后代性状之间的表型和遗传相关性。为此，我们记录了2个产前性状(窝卵大小和卵大小)，2个出生后亲代行为(直接照顾幼虫和间接照顾资源)，1个后代行为(乞讨)，以及2个衡量繁殖成功的指标(幼虫散布质量和散布幼虫数量)。与在较小的身体上繁殖的雌性相比，在较大的身体上繁殖的雌性提供的直接护理较少，但产生的幼虫较大。此外，窝卵大小、直接和间接护理之间存在正的表型相关。卵大小和直接照料均与散布质量呈正相关，而窝卵数与散布质量呈负相关。窝卵数和分散幼虫数量在来源种群之间的差异和显着遗传力方面都表现出遗传差异。然而，我们没有发现其他亲本或子代性状存在遗传差异的证据。我们的结果表明，亲本性状之间的相关性是由个体质量的差异驱动的，而不是权衡，一些亲本性状促进后代生长，而另一些亲本性状增加后代数量，由于加性遗传方差水平较低，亲本和后代性状对选择的反应可能较慢。
Although the evolution of parental care is a central topic in behavioral ecology, we know relatively little about how complex forms of care evolve. We studied elaborate parental care in the burying beetle N. vespilloides. Our results suggest that females differ in their parental quality, that some parental behaviors enhance offspring growth while others enhance offspring survival, and that there is little genetic variation in parental and offspring behaviors. Twitter: @persmiseth The evolution of elaborate forms of parental care is an important topic in behavioral ecology, yet the factors shaping the evolution of complex suites of parental and offspring traits are poorly understood. Here, we use a multivariate quantitative genetic approach to study phenotypic and genetic correlations between parental and offspring traits in the burying beetle Nicrophorus vespilloides. To this end, we recorded 2 prenatal traits (clutch size and egg size), 2 postnatal parental behaviors (direct care directed toward larvae and indirect care directed toward resource maintenance), 1 offspring behavior (begging), and 2 measures of breeding success (larval dispersal mass and number of dispersing larvae). Females breeding on larger carcasses provided less direct care but produced larger larvae than females breeding on smaller carcasses. Furthermore, there were positive phenotypic correlations between clutch size, direct, and indirect care. Both egg size and direct care were positively correlated with dispersal mass, whereas clutch size was negatively correlated with dispersal mass. Clutch size and number of dispersed larvae showed genetic variance both in terms of differences between populations of origin and significant heritabilities. However, we found no evidence of genetic variance underlying other parental or offspring traits. Our results suggest that correlations between suites of parental traits are driven by variation in individual quality rather than trade-offs, that some parental traits promote offspring growth while others increase the number of offspring produced, and that parental and offspring traits might respond slowly to selection due to low levels of additive genetic variance.