Heritable variation in colour patterns mediating individual recognition.
Heritable variation in colour patterns mediating individual recognition.
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DOI：
10.1098/rsos.161008
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发表时间：
2017-02
影响因子：
3.5
通讯作者：
Tibbetts EA
中科院分区：
文献类型：
--
作者：
Sheehan MJ;Choo J;Tibbetts EA
理解在自然种群中产生和维持变异的发展和进化过程仍然是现代生物学面临的主要挑战。褐飞虱纸蜂种群具有高度可变的颜色模式，这些模式调节着个体识别。以前的实验和比较研究已经提供了证据，证明颜色模式多样性是个人为宣传自己的身份而选择的结果。独特的身份信号表型有助于识别，从而减少褐飞虱中熟悉个体之间的攻击性。对身份信号的选择可以通过对遗传多样性有不同影响的两种不同的选择模式来增加表型多样性。增加可塑性的定向选择会大大增加表型多样性，但会降低相关基因座的遗传多样性。或者，在平衡选择的情况下，可遗传的身份信号将保持相关基因座的遗传多样性。在这里，我们评估了用于面部识别的颜色模式多样性是否存在可遗传变异，这些变异发生在野生褐飞虱种群中。我们发现颜色模式是可遗传的，而不是孟德尔的，这表明有多个基因座参与其中。此外，性状间的遗传相关模式表明，许多潜在的颜色模式变异的基因座是不连锁的，是独立分离的。我们的结果支持这样一个模型，即可识别的好处保持了用于识别的表型多样性编码的多个未连接基因座的遗传变异。
Understanding the developmental and evolutionary processes that generate and maintain variation in natural populations remains a major challenge for modern biology. Populations of Polistes fuscatus paper wasps have highly variable colour patterns that mediate individual recognition. Previous experimental and comparative studies have provided evidence that colour pattern diversity is the result of selection for individuals to advertise their identity. Distinctive identity-signalling phenotypes facilitate recognition, which reduces aggression between familiar individuals in P. fuscatus wasps. Selection for identity signals may increase phenotypic diversity via two distinct modes of selection that have different effects on genetic diversity. Directional selection for increased plasticity would greatly increase phenotypic diversity but decrease genetic diversity at associated loci. Alternatively, heritable identity signals under balancing selection would maintain genetic diversity at associated loci. Here, we assess whether there is heritable variation underlying colour pattern diversity used for facial recognition in a wild population of P. fuscatus wasps. We find that colour patterns are heritable and not Mendelian, suggesting that multiple loci are involved. Additionally, patterns of genetic correlations among traits indicated that many of the loci underlying colour pattern variation are unlinked and independently segregating. Our results support a model where the benefits of being recognizable maintain genetic variation at multiple unlinked loci that code for phenotypic diversity used for recognition.