Genomics and the origin of species

Seehausen, Ole; Butlin, Roger K.; Keller, Irene; Wagner, Catherine E.; Boughman, Janette W.; Hohenlohe, Paul A.; Peichel, Catherine L.; Sætre, Glenn‐Peter; Bank, Claudia; Brännström, Åke; Brelsford, Alan; Clarkson, Chris S.; Eroukhmanoff, Fabrice; Feder, Jeffrey L.; Fischer, Martin C.; Foote, Andrew D.; Franchini, Paolo; Jiggins, Chris D.; Jones, Felicity C.; Lindholm, Anna K.; Lucek, Kay; Maan, Martine E.; Marques, David Alexander; Martin, Simon H.; Matthews, Blake; Meier, Joana I.; Möst, Markus; Nachman, Michael W.; Nonaka, Etsuko; Rennison, Diana J.; Schwarzer, Julia; Watson, Eric T.; Westram, Anja M.; Widmer, Alex

doi:10.1038/nrg3644

Cited by 915 publications

(1,186 citation statements)

References 198 publications

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“…2014). A classic problem for speciation is that if combinations of divergently selected alleles arise in populations that remain in contact, recombination is expected to break down the associations between alleles and prevent speciation from proceeding (Felsenstein 1981).…”

Section: Introductionmentioning

confidence: 99%

No evidence for maintenance of a sympatricHeliconiusspecies barrier by chromosomal inversions

et al. 2017

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Mechanisms that suppress recombination are known to help maintain species barriers by preventing the breakup of coadapted gene combinations. The sympatric butterfly species Heliconius melpomene and Heliconius cydno are separated by many strong barriers, but the species still hybridize infrequently in the wild, and around 40% of the genome is influenced by introgression. We tested the hypothesis that genetic barriers between the species are maintained by inversions or other mechanisms that reduce between‐species recombination rate. We constructed fine‐scale recombination maps for Panamanian populations of both species and their hybrids to directly measure recombination rate within and between species, and generated long sequence reads to detect inversions. We find no evidence for a systematic reduction in recombination rates in F1 hybrids, and also no evidence for inversions longer than 50 kb that might be involved in generating or maintaining species barriers. This suggests that mechanisms leading to global or local reduction in recombination do not play a significant role in the maintenance of species barriers between H. melpomene and H. cydno.

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Section: Introductionmentioning

confidence: 99%

No evidence for maintenance of a sympatricHeliconiusspecies barrier by chromosomal inversions

et al. 2017

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“…However, it had been shown that speciation can occur by adaptation and divergent selection also with geneflow (Seehausen et al. 2014) and several new concepts had been developed that explain the context between genetic diversity, selection, and gene flow, e.g., the hybrid swarm – (Seehausen 2004) or the surfing syngameon hypothesis (Caujapé‐Castells 2011). These hypotheses postulate that populations can work as sink of genetic diversity through hybridization which furthermore could buffer effects of genetic drift and could increase the level of diversity for selection to act upon and could thus foster differentiation by adaptation.…”

Section: Introductionmentioning

confidence: 99%

Genetic structure of Micromeria (Lamiaceae) in Tenerife, the imprint of geological history and hybridization on within‐island diversification

Puppo

Curto

Meimberg

2016

Ecology and Evolution

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Geological history of oceanic islands can have a profound effect on the evolutionary history of insular flora, especially in complex islands such as Tenerife in the Canary Islands. Tenerife results from the secondary connection of three paleo‐islands by a central volcano, and other geological events that further shaped it. This geological history has been shown to influence the phylogenetic history of several taxa, including genus Micromeria (Lamiaceae). Screening 15 microsatellite markers in 289 individuals representing the eight species of Micromeria present in Tenerife, this study aims to assess the genetic diversity and structure of these species and its relation with the geological events on the island. In addition, we evaluate the extent of hybridization among species and discuss its influence on the speciation process. We found that the species restricted to the paleo‐islands present lower levels of genetic diversity but the highest levels of genetic differentiation suggesting that their ranges might have contracted over time. The two most widespread species in the island, M. hyssopifolia and M. varia, present the highest genetic diversity levels and a genetic structure that seems correlated with the geological composition of the island. Samples from M. hyssopifolia from the oldest paleo‐island, Adeje, appear as distinct while samples from M. varia segregate into two main clusters corresponding to the paleo‐islands of Anaga and Teno. Evidence of hybridization and intraspecific migration between species was found. We argue that species boundaries would be retained despite hybridization in response to the habitat's specific conditions causing postzygotic isolation and preserving morphological differentiation.

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“…Although central to evolution, the cellular and molecular mechanisms underlying postzygotic barriers that drive reproductive isolation and speciation remain largely unknown 1,2 . Species of the African Clawed frog Xenopus provide an ideal system to study hybridization and genome evolution.…”

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confidence: 99%

Paternal chromosome loss and metabolic crisis contribute to hybrid inviability in Xenopus

Gibeaux

Acker

Kitaoka

et al. 2018

Nature

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Genomics and the origin of species

Cited by 915 publications

References 198 publications

No evidence for maintenance of a sympatricHeliconiusspecies barrier by chromosomal inversions

No evidence for maintenance of a sympatricHeliconiusspecies barrier by chromosomal inversions

Genetic structure of Micromeria (Lamiaceae) in Tenerife, the imprint of geological history and hybridization on within‐island diversification

Paternal chromosome loss and metabolic crisis contribute to hybrid inviability in Xenopus

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