The genetic basis of early‐life morphological traits and their relation to alternative male reproductive tactics in Atlantic salmon
The genetic basis of early‐life morphological traits and their relation to alternative male reproductive tactics in Atlantic salmon
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大西洋鲑鱼早期形态特征的遗传基础及其与替代雄性繁殖策略的关系
DOI：
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发表时间：
2010
影响因子：
2.1
通讯作者：
J. Dodson
中科院分区：
文献类型：
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作者：
David J. Páez;Michael B. Morrissey;Louis Bernatchez;J. Dodson
虽然遗传力估计性状潜在的自然选择越来越多地被报道，他们的估计仍然是一个挑战，如果我们要了解的模式，适应性表型变化的性质。考虑到选择对早期生命表型的潜在重要作用，从而对许多鱼类物种的未来生活史事件的潜在重要作用，我们使用大西洋鲑鱼（萨尔莫salar L.），有两个主要目标。第一个目标是确定起源的网站，父亲的性别策略和添加剂的遗传效应影响的几个形态性状在孵化和出现的表型变异。第二个目的是检验生命早期的表型特征和男性在生命后期的替代策略之间是否存在联系。我们没有发现任何形态特征在孵化或出现的网站或父亲的影响的证据，这表明在自然河流系统中观察到的这些鱼起源的空间表型差异主要是环境驱动的。然而，我们确实发现了几个性状的显著遗传力和母体效应，包括体型。没有直接证据表明性早熟的发生率与早期生命特征相关。我们认为，在良好的生长条件下，在早期发育阶段的身体大小和其他特征是不可靠的线索，为超越与男性性发育相关的阈值。
Although heritability estimates for traits potentially under natural selection are increasingly being reported, their estimation remains a challenge if we are to understand the patterns of adaptive phenotypic change in nature. Given the potentially important role of selection on the early life phenotype, and thereby on future life history events in many fish species, we conducted a common garden experiment, using the Atlantic salmon (Salmo salar L.), with two major aims. The first objective is to determine how the site of origin, the paternal sexual tactic and additive genetic effects influence phenotypic variation of several morphological traits at hatching and emergence. The second aim is to test whether a link exists between phenotypic characteristics early in life and the incidence of male alternative tactics later in life. We found no evidence of a site or paternal effect on any morphological trait at hatching or emergence, suggesting that the spatial phenotypic differences observed in the natural river system from which these fish originated are mainly environmentally driven. However, we do find significant heritabilities and maternal effects for several traits, including body size. No direct evidence was found correlating the incidence of precocious maturation with early life characteristics. We suggest that under good growing conditions, body size and other traits at early developmental stages are not reliable cues for the surpassing of the threshold values associated with male sexual development.
影响因子：
3.3
作者：
D. Houle
通讯作者：
D. Houle
影响因子：
4.8
作者：
Benton, T. G.;St Clair, J. J. H.;Plaistow, S. J.
通讯作者：
Plaistow, S. J.