Single-male paternity in coelacanths

Lampert, Kathrin P.; Blassmann, Katrin; Hissmann, Karen; Schauer, Jürgen; Shunula, Peter; Kharousy, Zahor el; Ngatunga, Benjamin P.; Fricke, Hans; Schartl, Manfred

doi:10.1038/ncomms3488

Cited by 7 publications

(2 citation statements)

References 45 publications

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“…Japanese individuals used for RAD sequencing have been previously described elsewhere [ 63 ]. Samples used for RAD sequencing from the Atlantic lineage were collected from across Ireland in 2009–2011 [ 90 , 91 ]. DNA was extracted using a Qiagen DNeasy Blood and Tissue Kit (Qiagen, Valencia, CA, USA).…”

Section: Methodsmentioning

confidence: 99%

The genomic landscape at a late stage of stickleback speciation: High genomic divergence interspersed by small localized regions of introgression

et al. 2018

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Speciation is a continuous process and analysis of species pairs at different stages of divergence provides insight into how it unfolds. Previous genomic studies on young species pairs have revealed peaks of divergence and heterogeneous genomic differentiation. Yet less known is how localised peaks of differentiation progress to genome-wide divergence during the later stages of speciation in the presence of persistent gene flow. Spanning the speciation continuum, stickleback species pairs are ideal for investigating how genomic divergence builds up during speciation. However, attention has largely focused on young postglacial species pairs, with little knowledge of the genomic signatures of divergence and introgression in older stickleback systems. The Japanese stickleback species pair, composed of the Pacific Ocean three-spined stickleback (Gasterosteus aculeatus) and the Japan Sea stickleback (G. nipponicus), which co-occur in the Japanese islands, is at a late stage of speciation. Divergence likely started well before the end of the last glacial period and crosses between Japan Sea females and Pacific Ocean males result in hybrid male sterility. Here we use coalescent analyses and Approximate Bayesian Computation to show that the two species split approximately 0.68–1 million years ago but that they have continued to exchange genes at a low rate throughout divergence. Population genomic data revealed that, despite gene flow, a high level of genomic differentiation is maintained across the majority of the genome. However, we identified multiple, small regions of introgression, occurring mainly in areas of low recombination rate. Our results demonstrate that a high level of genome-wide divergence can establish in the face of persistent introgression and that gene flow can be localized to small genomic regions at the later stages of speciation with gene flow.

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Section: Methodsmentioning

confidence: 99%

The genomic landscape at a late stage of stickleback speciation: High genomic divergence interspersed by small localized regions of introgression

et al. 2018

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“…The monotypic cnidarian Polypodium hydriforme, a parasite found only in eggs of a small order of fishes (Acipenseriformes), may be exclusively parthenogenetic 75 and therefore not subject to sexual selection 19 . Coelacanths, one of only five classes of chordates for which indications of sexual selection on chemosensory traits are lacking, were thought long extinct before their rediscovery in 1938 76 ; today, basic questions about their reproductive behavior, such as how they interact with mates, remain unanswered 77 . Improving our basic understanding of some clades will almost certainly unveil more evidence of sexual selection on chemosensory traits.…”

Section: Box 1 | Glossarymentioning

confidence: 99%

Chemical communication and its role in sexual selection across Animalia

Buchinger,

2023

Commun Biol

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Sexual selection has been studied as a major evolutionary driver of animal diversity for roughly 50 years. Much evidence indicates that competition for mates favors elaborate signaling traits. However, this evidence comes primarily from a few taxa, leaving sexual selection as a salient evolutionary force across Animalia largely untested. Here, we reviewed the evidence for sexual selection on communication across all animal phyla, classes, and orders with emphasis on chemoreception, the only sense shared across lifeforms. An exhaustive literature review documented evidence for sexual selection on chemosensory traits in 10 of 34 animal phyla and indications of sexual selection on chemosensory traits in an additional 13 phyla. Potential targets of sexual selection include structures and processes involved in production, delivery, and detection of chemical signals. Our review suggests sexual selection plays a widespread role in the evolution of communication and highlights the need for research that better reflects animal diversity.

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