Evolution of a neuromuscular sexual dimorphism in the Drosophila montium species group

Abstract While epigamic traits likely evolve via sexual selection, the mechanism whereby internal sexual dimorphism arises remains less well understood. Seeking clues as to how the internal sexual dimorphism evolved, we compared the abdominal musculature of 41 Drosophila montium group species, to de...

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Autores principales:	Han-qing Liang, Toru Katoh, Kosei Sato, Daisuke Yamamoto, Shuo-yang Wen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9c2e5b8c17714693818025f3d695bcbd
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spelling	oai:doaj.org-article:9c2e5b8c17714693818025f3d695bcbd2021-12-02T16:06:43ZEvolution of a neuromuscular sexual dimorphism in the Drosophila montium species group10.1038/s41598-021-94722-32045-2322https://doaj.org/article/9c2e5b8c17714693818025f3d695bcbd2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94722-3https://doaj.org/toc/2045-2322Abstract While epigamic traits likely evolve via sexual selection, the mechanism whereby internal sexual dimorphism arises remains less well understood. Seeking clues as to how the internal sexual dimorphism evolved, we compared the abdominal musculature of 41 Drosophila montium group species, to determine whether any of these species carry a male-specific muscle of Lawrence (MOL). Our quantitative analysis revealed that the size of a sexually dimorphic MOL analog found in 19 montium group species varied widely from species to species, suggesting the gradual evolution of this sexually dimorphic neuromuscular trait. We attempted the ancestral state reconstitution for the presence or absence of the neuromuscular sexual dimorphism in the A5 segment; the neuromuscular sexual dimorphism existed in an old ancestor of the montium group, which was lost in some of the most recent common ancestors of derived lineages, and subsequently some species regained it. This loss-and-gain history was not shared by evolutionary changes in the courtship song pattern, even though both traits were commonly regulated by the master regulator male-determinant protein FruM. It is envisaged that different sets of FruM target genes may serve for shaping the song and MOL characteristics, respectively, and, as a consequence, each phenotypic trait underwent a distinct evolutionary path.Han-qing LiangToru KatohKosei SatoDaisuke YamamotoShuo-yang WenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Han-qing Liang Toru Katoh Kosei Sato Daisuke Yamamoto Shuo-yang Wen Evolution of a neuromuscular sexual dimorphism in the Drosophila montium species group
description	Abstract While epigamic traits likely evolve via sexual selection, the mechanism whereby internal sexual dimorphism arises remains less well understood. Seeking clues as to how the internal sexual dimorphism evolved, we compared the abdominal musculature of 41 Drosophila montium group species, to determine whether any of these species carry a male-specific muscle of Lawrence (MOL). Our quantitative analysis revealed that the size of a sexually dimorphic MOL analog found in 19 montium group species varied widely from species to species, suggesting the gradual evolution of this sexually dimorphic neuromuscular trait. We attempted the ancestral state reconstitution for the presence or absence of the neuromuscular sexual dimorphism in the A5 segment; the neuromuscular sexual dimorphism existed in an old ancestor of the montium group, which was lost in some of the most recent common ancestors of derived lineages, and subsequently some species regained it. This loss-and-gain history was not shared by evolutionary changes in the courtship song pattern, even though both traits were commonly regulated by the master regulator male-determinant protein FruM. It is envisaged that different sets of FruM target genes may serve for shaping the song and MOL characteristics, respectively, and, as a consequence, each phenotypic trait underwent a distinct evolutionary path.
format	article
author	Han-qing Liang Toru Katoh Kosei Sato Daisuke Yamamoto Shuo-yang Wen
author_facet	Han-qing Liang Toru Katoh Kosei Sato Daisuke Yamamoto Shuo-yang Wen
author_sort	Han-qing Liang
title	Evolution of a neuromuscular sexual dimorphism in the Drosophila montium species group
title_short	Evolution of a neuromuscular sexual dimorphism in the Drosophila montium species group
title_full	Evolution of a neuromuscular sexual dimorphism in the Drosophila montium species group
title_fullStr	Evolution of a neuromuscular sexual dimorphism in the Drosophila montium species group
title_full_unstemmed	Evolution of a neuromuscular sexual dimorphism in the Drosophila montium species group
title_sort	evolution of a neuromuscular sexual dimorphism in the drosophila montium species group
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9c2e5b8c17714693818025f3d695bcbd
work_keys_str_mv	AT hanqingliang evolutionofaneuromuscularsexualdimorphisminthedrosophilamontiumspeciesgroup AT torukatoh evolutionofaneuromuscularsexualdimorphisminthedrosophilamontiumspeciesgroup AT koseisato evolutionofaneuromuscularsexualdimorphisminthedrosophilamontiumspeciesgroup AT daisukeyamamoto evolutionofaneuromuscularsexualdimorphisminthedrosophilamontiumspeciesgroup AT shuoyangwen evolutionofaneuromuscularsexualdimorphisminthedrosophilamontiumspeciesgroup
_version_	1718384918914924544

Evolution of a neuromuscular sexual dimorphism in the Drosophila montium species group

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