A caste differentiation mutant elucidates the evolution of socially parasitic ants.
A caste differentiation mutant elucidates the evolution of socially parasitic ants.
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DOI：
10.1016/j.cub.2023.01.067
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发表时间：
2023-03-27
期刊：
影响因子：
9.2
通讯作者：
Kronauer, Daniel J. C.
中科院分区：
文献类型：
--
作者：
Trible, Waring;Chandra, Vikram;Lacy, Kip D.;Limon, Gina;McKenzie, Sean K.;Olivos-Cisneros, Leonora;Arsenault, Samuel V.;Kronauer, Daniel J. C.
大多数蚂蚁物种都有两种不同的雌性种姓，蚁后和工蚁，但产生这些替代表型的发育和遗传机制仍然知之甚少。通过研究克隆蚂蚁，我们发现了一种变异株，它在通常会成为工人的个体中表达了类似女王的特征。这些变异体在形态、行为和适应性上发生了变化，导致它们依赖野生型菌落中的工人生存。总的来说，它们类似于许多专性寄生蚂蚁的蚁后，这些蚂蚁在进化上已经失去了工蚁种姓，生活在密切相关的宿主群体中。这些无工作者的社会寄生虫进化的流行理论是，它们从生殖隔离的兼性中间体种群进化而来，这些中间体以逐步的方式获得寄生表型。然而，这种兼性祖先的经验证据仍然很薄弱，目前还不清楚生殖隔离如何在同域中逐渐出现。相比之下，我们分离出这些变异体后，他们出现在其野生型亲本菌落，这意味着复杂的表型在这里报告的诱导在一个单一的遗传步骤。这表明，一个单一的遗传模块可以解耦种姓发展的协调机制，允许专性寄生变异直接从一个自由生活的祖先。与这一假设相一致的是，这些变异体丢失了一个假定的超基因的两个等位基因之一，该超基因在野生型中是杂合的。这些发现为蚂蚁社会寄生虫的进化提供了一个合理的解释，并为蚂蚁种姓分化提供了新的候选分子机制。特里布尔等人报道了一种克隆入侵蚁的变异株，这种变异株在正常情况下会成为工蚁的个体中表现出类似蚁后的特征。这些专性寄生变异体具有突变的超基因，并直接从其自由生活的亲本菌株中产生，这表明了蚂蚁无工作社会寄生虫进化的遗传机制。
Most ant species have two distinct female castes, queens and workers, yet the developmental and genetic mechanisms that produce these alternative phenotypes remain poorly understood. Working with a clonal ant, we discovered a variant strain that expresses queen-like traits in individuals that would normally become workers. The variants show changes in morphology, behavior, and fitness that cause them to rely on workers in wild-type colonies for survival. Overall, they resemble the queens of many obligately parasitic ants that have evolutionarily lost the worker caste and live inside colonies of closely related hosts. The prevailing theory for the evolution of these workerless social parasites is that they evolve from reproductively isolated populations of facultative intermediates that acquire parasitic phenotypes in a stepwise fashion. However, empirical evidence for such facultative ancestors remains weak, and it is unclear how reproductive isolation could gradually arise in sympatry. In contrast, we isolated these variants just a few generations after they arose within their wild-type parent colony, implying that the complex phenotype reported here was induced in a single genetic step. This suggests that a single genetic module can decouple the coordinated mechanisms of caste development, allowing an obligately parasitic variant to arise directly from a free-living ancestor. Consistent with this hypothesis, the variants have lost one of the two alleles of a putative supergene that is heterozygous in wild types. These findings provide a plausible explanation for the evolution of ant social parasites and implicate new candidate molecular mechanisms for ant caste differentiation. Trible et al. report a variant strain of the clonal raider ant that expresses queen-like traits in individuals that would normally become workers. These obligately parasitic variants have a mutated supergene and arose directly from their free-living parent strain, suggesting a genetic mechanism for the evolution of ant workerless social parasites.
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影响因子：
1.3
作者：
Bharti H;Rilta JS;Dhadwal T
通讯作者：
Dhadwal T
影响因子：
10.7
作者：
Huerta-Cepas J;Forslund K;Coelho LP;Szklarczyk D;Jensen LJ;von Mering C;Bork P
通讯作者：
Bork P
影响因子：
16.8
作者：
BUSCHINGER, A
通讯作者：
BUSCHINGER, A
影响因子：
48
作者：
Chin, Chen-Shan;Peluso, Paul;Schatz, Michael C.
通讯作者：
Schatz, Michael C.
DOI：
10.1098/rspb.1999.0618
发表时间：
1999-01-22
影响因子：
4.7
作者：
Aron, S;Passera, L;Keller, L
通讯作者：
Keller, L