Genetic basis for the evolution of pelvic-fin brooding, a new mode of reproduction, in a Sulawesian fish

Modes of reproduction in animals are diverse, with different modes having evolved independently in multiple lineages across a variety of taxa. However, an understanding of the genomic change driving the transition between different modes of reproduction is limited. Several ricefishes (Adrianichthyidae) on the island of Sulawesi have a unique mode of reproduction called “pelvic-fin brooding,” wherein females carry externally fertilized eggs until hatching using their pelvic fins. The phylogenomic analysis demonstrated pelvic-fin brooders to have evolved at least twice in two distant clades of the Adrianichthyidae. We investigated the genetic architecture of the evolution of this unique mode of reproduction. Morphological analyses and laboratory observations revealed that females of pelvic-fin brooders have longer pelvic fins and a deeper abdominal concavity and that they can carry an egg clutch for longer than non-brooding adrianichthyids, suggesting that these traits play important role..., , , # Genetic basis for the evolution of pelvic-fin brooding, a new mode of reproduction, in a Sulawesian fish

[https://doi.org/10.5061/dryad.v6wwpzgwz](https://doi.org/10.5061/dryad.v6wwpzgwz)

README for data set from Javier et al. 2022 Molecular Ecology. The data set accompanies six Dryad data files.

Uploaded: October 2021

Contact: Kazunori Yamahira ([[e-mail]](mailto:[e-mail]))

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**File 1: File_1_Phenotype_17_species.txt**

The phenotypes data for the 17 Sulawesi-endemic adrianichthyid species. Standard length, pelvic-fin length, the extent of abdominal concavity, and the number of days for which eggs were carried are measured for each female. Measurement units are included within the files. Three females per species were included, except for *Adrianichthys poptae* for which measurements were repeated three times using one female. NA indicates that it is not applica...