Document of bibliographic reference 396533

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Effect of the frequency of multi-specific synchronous spawning on genetic introgression among three Acropora species

Abstract

Hybridisation is an evolutionary process that generates genetic diversity in organisms. However, the rela?tionship between reproductive features, such as spawning synchronisation and gamete compatibility, and the degree of introgression leading to hybridisation are poorly under?stood. The reef-building coral Acropora spp. have a com?plex evolutionary history, and the link between their ecol?ogy, life-history traits, and potential to hybridise is disputed. Here, we examined the relationship among the reproductive features involved in the intercrossing of three species, Acro?pora forida, Acropora gemmifera, and Acropora intermedia, at two sites: Akajima and the Sesoko islands in southern Japan. Although the examined species showed synchronous spawning and high rates of gamete compatibility, spawning synchronisation and gamete compatibility were less strongly associated with high rates of interbreeding among the three species. Model-based genetic clustering and site-pattern frequency-based tests with single nucleotide polymorphisms supported genetic admixture among the three species in each location. Demographic analyses using fastsimcoal implied that the admixture among the three species in each loca?tion might have occurred in the past (>2,000 generations) and recently (<50 generations). Furthermore, the recent admixture of these three species is potentially associated with heavy bleaching events and population declines. The principal component analysis, structure, and fastsimcoal showed that the extensive admixture of A. intermedia and A. gemmifera on Sesoko Island occurred recently. Therefore, gamete interactions that lead to hybridisation in the feld must be clarifed. Furthermore, the connectivity between the two locations needs to be identifed; however, our results implied that population fuctuations could be associated with introgression.

Bibliographic citation

Isomura, N.; Inoha, K.; Shimura, A.; Yasuda, N.; Kikuchi, T.; Iwao, K.; Kitanobo, S.; Ohki, S.; Morita, M.; Fukami, H. (2024). Effect of the frequency of multi-specific synchronous spawning on genetic introgression among three Acropora species. Coral Reefs 43(5): 1497-1509. https://dx.doi.org/10.1007/s00338-024-02554-0

Is peer reviewed

true