Genetic determination of the queen caste in an ant hybrid zone
Genetic determination of the queen caste in an ant hybrid zone
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DOI：
10.1073/pnas.112222099
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发表时间：
2002-06-11
影响因子：
11.1
通讯作者：
Larrabee, D
中科院分区：
文献类型：
--
作者：
Julian, GE;Fewell, JH;Larrabee, D
生殖工人和不育工人如何在社会群体中区分的问题长期以来一直是社会生物学的核心问题，因为它要求个体直接适应的损失有利于间接或群体水平的适应增益。社会行为的进化要求工人和雌性生殖动物之间的区别是由环境决定的，因为由基因决定的不育将很快被消除。然而，我们报告了在美国西南部常见的两种种子收获蚁（Pogonomyrmex rugosus和Pogonomyrmex barbatus）种群中遗传等级决定的明确证据。工蜂和蜂王之间的遗传差异只存在于两种物种的共交区，因此似乎是由杂交产生的。我们的数据表明，这种杂交对这些物种的种姓决定系统和交配模式产生了深远的历史影响。
The question of how reproductives and sterile workers differentiate within eusocial groups has long been a core issue in socio-biology because it requires the loss of individual direct fitness in favor of indirect or group-level fitness gains. The evolution of social behavior requires that differentiation between workers and female reproductives be environmentally determined, because genetically determined sterility would be quickly eliminated. Nevertheless, we report clear evidence of genetic caste determination in populations of two seed harvester ant species common to the southwestern USA, Pogonomyrmex rugosus and Pogonomyrmex barbatus. The genetic differentiation between workers and queens is found only in areas of sympatry of the two species, and thus appears to arisen from hybridization. Our data suggest that this hybridization has had a profound historical effect on the caste determination systems and mating patterns of each of these species.