Multiple mating in the context of interspecific hybridization between two Tetramorium ant species,Heredity

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Multiple mating in the context of interspecific hybridization between two Tetramorium ant species
Heredity ( IF 3.1 ) Pub Date : 2020-03-23 , DOI: 10.1038/s41437-020-0310-3
Marion Cordonnier ₁ , Gilles Escarguel ₁ , Adeline Dumet ₁ , Bernard Kaufmann ₁

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In eusocial Hymenoptera, haplodiploidy and polyandry may facilitate selection for hybridization. Interspecific hybridization is widespread in ants and can lead to hybrid inviability as well as the formation of new species through hybrid speciation. However, in ants, polyandry is uncommon. By analyzing microsatellite markers on 15 ant workers per colony, we show that the mating system of 28 pure colonies of Tetramorium immigrans, 15 pure colonies of Tetramorium caespitum, and 27 hybrid colonies is a monogyne/polyandrous mating system, with a higher mating rate in T. caespitum (mean = 2.4 males vs. 1.7 in T. immigrans). Hybrid queens, but no hybrid fathers, were deduced from workers’ genotypes, in accordance with Haldane’s rule extended to haplodiploid organisms, which states that the haploid sex should more often be sterile or inviable. In five colonies, hybridization and multiple mating allowed the simultaneous production of both hybrid and nonhybrid offspring. Although rare, these situations hinted at asymmetrical, larger contributions of T. immigrans vs. T. caespitum males to offspring production. Together, these findings point toward a complex and dynamic mating system in T. immigrans and T. caespitum, and contribute to better understand interspecific hybridization mechanisms and their consequences on genetic and taxonomic diversity. The study of polyandry within a hybrid zone is unprecedented and opens new opportunities to better understand interspecific hybridization mechanisms and their short- to long-term consequences.

中文翻译：

两种 Tetramorium ant 物种间种间杂交背景下的多重交配

在真社会膜翅目中，单倍二倍体和一妻多夫可以促进杂交选择。种间杂交在蚂蚁中很普遍，可导致杂交不存活以及通过杂交物种形成形成新物种。然而，在蚂蚁中，一妻多夫并不常见。通过分析每个蚁群 15 只蚁工的微卫星标记，我们发现 28 个纯移行蚁群、15 个纯白蚁群和 27 个杂交蚁群的交配系统是单雌/多雄交配系统，在T. caespitum（平均 = 2.4 名男性对 T. immigrans 中的 1.7 名）。根据 Haldane 扩展到单倍二倍体生物的规则，从工蜂的基因型推断出杂种皇后，但没有杂种父亲，该规则指出单倍体性别应该更多地是不育或不能存活的。在五个群体中，杂交和多重交配允许同时产生杂交和非杂交后代。虽然很少见，但这些情况暗示了 T. immigrans 与 T. caespitum 雄性对后代生产的不对称、更大的贡献。总之，这些发现指向 T. immigrans 和 T. caespitum 中复杂和动态的交配系统，有助于更好地了解种间杂交机制及其对遗传和分类多样性的影响。对杂交区内一妻多夫的研究是前所未有的，并为更好地了解种间杂交机制及其短期到长期后果开辟了新的机会。这些情况暗示了 T. immigrans 与 T. caespitum 雄性对后代生产的不对称、更大的贡献。总之，这些发现指向 T. immigrans 和 T. caespitum 中复杂和动态的交配系统，有助于更好地了解种间杂交机制及其对遗传和分类多样性的影响。对杂交区内一妻多夫的研究是前所未有的，并为更好地了解种间杂交机制及其短期到长期后果开辟了新的机会。这些情况暗示了 T. immigrans 与 T. caespitum 雄性对后代生产的不对称、更大的贡献。总之，这些发现指向 T. immigrans 和 T. caespitum 中复杂和动态的交配系统，有助于更好地了解种间杂交机制及其对遗传和分类多样性的影响。对杂交区内一妻多夫的研究是前所未有的，并为更好地了解种间杂交机制及其短期到长期后果开辟了新的机会。并有助于更好地了解种间杂交机制及其对遗传和分类多样性的影响。对杂交区内一妻多夫的研究是前所未有的，并为更好地了解种间杂交机制及其短期到长期后果开辟了新的机会。并有助于更好地了解种间杂交机制及其对遗传和分类多样性的影响。对杂交区内一妻多夫的研究是前所未有的，并为更好地了解种间杂交机制及其短期到长期后果开辟了新的机会。

更新日期：2020-03-23

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