The evolution of multiple mating in army ants
The evolution of multiple mating in army ants
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DOI：
10.1111/j.1558-5646.2007.00040.x
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发表时间：
2007-02-01
期刊：
影响因子：
3.3
通讯作者：
Boomsma, Jacobus J.
中科院分区：
文献类型：
--
作者：
Kronauer, Daniel J. C.;Johnson, Robert A.;Boomsma, Jacobus J.
在全社会膜翅目昆虫中，交配系统的进化受到限制，因为雌性只在生命早期的短暂时期内交配，而受精后及其储存的精子可以存活数十年。近年来的大量研究已经确定，强制多次交配只进化了几次：在Apis蜜蜂、Vespula黄蜂、Pogonomyrmex收获蚁、Atta和Acromyrmex切叶蚁、Cataglyphis cursor蚁以及至少一些军蚁中。在这里，我们提供了新世界Neivamyrmex和旧世界Aenictus物种的蚁后交配频率的估计，与其他军蚁相比，它们的蚁群相对较小，工蚁之间的大小多态性较小。为了首次对军蚁交配系统的进化进行全面的比较分析，我们将这些新结果与之前对非洲Dorylus和新世界Eciton军蚁的估计相结合，这两种蚂蚁具有非常大的群体和相当大的工蚁多态性。我们发现Neivamyrmex和Aenictus的蚁后与大量的雄蚁交配（通常约为10-20只），这与具有非常大的群体规模的军蚁物种的蚁后是一样的。我们推断，多个蚁后交配是行军蚁的祖先，并在1亿多年前进化为行军蚁适应综合征的一部分。一项对军蚁和蜜蜂的比较表明，这两个远亲群体的交配系统可能是在惊人相似的选择压力下逐渐形成的。
The evolution of mating systems in eusocial Hymenoptera is constrained because females mate only during a brief period early in life, whereas inseminated queens and their stored sperm may live for decades. Considerable research effort during recent years has firmly established that obligate multiple mating has evolved only a few times: in Apis honeybees, Vespula wasps, Pogonomyrmex harvester ants, Atta and Acromyrmex leaf-cutting ants, the ant Cataglyphis cursor, and in at least some army ants. Here we provide estimates of queen-mating frequency for New World Neivamyrmex and Old World Aenictus species, which, compared to other army ants, have relatively small colonies and little size polymorphism among workers. To provide the first overall comparative analysis of the evolution of army ant mating systems, we combine these new results with previous estimates for African Dorylus and New World Eciton army ants, which have very large colonies and considerable worker polymorphism. We show that queens of Neivamyrmex and Aenictus mate with the same high numbers of males (usually ca. 10-20) as do queens of army ant species with very large colony sizes. We infer that multiple queen mating is ancestral in army ants and has evolved over 100 million years ago as part of the army ant adaptive syndrome. A comparison of army ants and honeybees suggests that mating systems in these two distantly related groups may have been convergently shaped by strikingly similar selective pressures.