Resolving between novelty and homology in the rapidly evolving phallus of Drosophila.
Drosophila
genitalia
homology
rapid evolution
Journal
Journal of experimental zoology. Part B, Molecular and developmental evolution
ISSN: 1552-5015
Titre abrégé: J Exp Zool B Mol Dev Evol
Pays: United States
ID NLM: 101168228
Informations de publication
Date de publication:
03 2023
03 2023
Historique:
revised:
24
08
2021
received:
17
05
2021
accepted:
10
10
2021
pubmed:
28
12
2021
medline:
11
2
2023
entrez:
27
12
2021
Statut:
ppublish
Résumé
The genitalia present some of the most rapidly evolving anatomical structures in the animal kingdom, possessing a variety of parts that can distinguish recently diverged species. In the Drosophila melanogaster group, the phallus is adorned with several processes, pointed outgrowths, that are similar in size and shape between species. However, the complex three-dimensional nature of the phallus can obscure the exact connection points of each process. Previous descriptions based upon adult morphology have primarily assigned phallic processes by their approximate positions in the phallus and have remained largely agnostic regarding their homology relationships. In the absence of clearly identified homology, it can be challenging to model when each structure first evolved. Here, we employ a comparative developmental analysis of these processes in eight members of the melanogaster species group to precisely identify the tissue from which each process forms. Our results indicate that adult phallic processes arise from three pupal primordia in all species. We found that in some cases the same primordia generate homologous structures whereas in other cases, different primordia produce phenotypically similar but remarkably non-homologous structures. This suggests that the same gene regulatory network may have been redeployed to different primordia to induce phenotypically similar traits. Our results highlight how traits diversify and can be redeployed, even at short evolutionary scales.
Identifiants
pubmed: 34958528
doi: 10.1002/jez.b.23113
pmc: PMC10155935
mid: NIHMS1891933
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Langues
eng
Sous-ensembles de citation
IM
Pagination
182-196Subventions
Organisme : NIGMS NIH HHS
ID : R35 GM141967
Pays : United States
Informations de copyright
© 2021 Wiley Periodicals LLC.
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