Postmating reproductive barriers contribute to the incipient sexual isolation of US and Caribbean<i>Drosophila melanogaster</i>

Kao, Jy; Lymer, Seana; Hwang, S. M.; Sung, Albert; Nuzhdin, SV

doi:10.1101/007765

Cited by 1 publication

(4 citation statements)

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“…A more recent study indicating the potential effects of admixture show that postmating reproductive traits such as lowered fertility and increased sperm toxicity tolerance towards genetically unfamiliar males are affected particularly in locations corresponding to this admixture hot zone at the border of the south‐east US and Caribbean islands (Kao et al . ).…”

Section: Discussionmentioning

confidence: 97%

“…Care must be taken to interpret results emanating from some Floridian populations as it seems that admixture could affect certain phenotypes (Kao et al . ). Investigations of actual migration between populations along east coast United States and Caribbean Islands would further illuminate the influence of African and European admixture on clinal patterns.…”

Section: Discussionmentioning

confidence: 97%

“…Previous work on premating reproductive isolation has shown distinct phenotype and male courtship patterns of American and Caribbean populations (Yukilevich & True 2008a,b). A more recent study indicating the potential effects of admixture show that postmating reproductive traits such as lowered fertility and increased sperm toxicity tolerance towards genetically unfamiliar males are affected particularly in locations corresponding to this admixture hot zone at the border of the south-east US and Caribbean islands (Kao et al 2014).…”

Section: African and European Admixture In North Americamentioning

confidence: 99%

“…While it makes sense that clinally varying selection could produce such geographical patterns, the recent studies on African and European admixture (Duchen et al 2013;Bergland et al 2014; present study) make it likely that steady gene flow from Caribbean populations could also be partly responsible for the generation of east coast US clinal patterns. Care must be taken to interpret results emanating from some Floridian populations as it seems that admixture could affect certain phenotypes (Kao et al 2014). Investigations of actual migration between populations along east coast United States and Caribbean Islands would further illuminate the influence of African and European admixture on clinal patterns.…”

Section: Westward Expansion Of Drosophila Melanogastermentioning

confidence: 99%

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Population genomic analysis uncovers African and European admixture in Drosophila melanogaster populations from the south‐eastern United States and Caribbean Islands

et al. 2015

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Drosophila melanogaster is postulated to have colonized North America in the past several 100 years in two waves. Flies from Europe colonized the east coast United States while flies from Africa inhabited the Caribbean, which if true, make the south-east US and Caribbean Islands a secondary contact zone for African and European D. melanogaster. This scenario has been proposed based on phenotypes and limited genetic data. In our study, we have sequenced individual whole genomes of flies from populations in the south-east US and Caribbean Islands and examined these populations in conjunction with population sequences from the west coast US, Africa, and Europe. We find that west coast US populations are closely related to the European population, likely reflecting a rapid westward expansion upon first settlements into North America. We also find genomic evidence of African and European admixture in south-east US and Caribbean populations, with a clinal pattern of decreasing proportions of African ancestry with higher latitude. Our genomic analysis of D. melanogaster populations from the south-east US and Caribbean Islands provides more evidence for the Caribbean Islands as the source of previously reported novel African alleles found in other east coast US populations. We also find the border between the south-east US and the Caribbean island to be the admixture hot zone where distinctly African-like Caribbean flies become genomically more similar to European-like south-east US flies. Our findings have important implications for previous studies examining the generation of east coast US clines via selection.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 97%

Section: African and European Admixture In North Americamentioning

confidence: 99%