J 2019

Genomic insight into "sky island" species diversification in a mountainous biodiversity hotspot

ZHANG, D., GQ. HAO, Xinyi GUO, QJ. HU, JQ. LIU et. al.

Základní údaje

Originální název

Genomic insight into "sky island" species diversification in a mountainous biodiversity hotspot

Autoři

ZHANG, D., GQ. HAO, Xinyi GUO (156 Čína, domácí), QJ. HU a JQ. LIU

Vydání

JOURNAL OF SYSTEMATICS AND EVOLUTION, 2019, 1674-4918

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10611 Plant sciences, botany

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Impakt faktor

Impact factor: 2.779

Kód RIV

RIV/00216224:14740/19:00124567

Organizační jednotka

Středoevropský technologický institut

UT WoS

000493743200001

Klíčová slova anglicky

Eutremaevolutionary historypopulation genomicssky island

Štítky

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 18. 5. 2022 15:15, Mgr. Pavla Foltynová, Ph.D.

Anotace

V originále

"Sky island" species diversification contributes greatly to mountainous biodiversity. However, the underlying genomic divergence and the inferred drivers remain largely unknown. In this study, we examined the diversification history of five diploid species with three exclusively endemic to the sky islands (mountains) of the Himalaya-Hengduan Mountains biodiversity hotspot. All of them together comprise a clade of the genus Eutrema (Brassicaceae). We resequenced genomes of multiple individuals of the found populations for each species. We recovered the inconsistent phylogenetic relationships between plastome and nuclear-genome trees for one species. Based on nuclear population genomic data, we detected high genetic divergence between five species with limited gene flow. Four species seemed to diverge mainly through geographical isolation, whereas one arose through hybrid origin. The origins of the sampled five species were dated to within the late Miocene when mountains were uplifted and climates oscillated. All species decreased their population sizes since the inferred origin of each species initially, but only two of them expanded after the Last Glacial Maximum. Together, these findings suggest that geographic isolation plays an important role in driving the sky island species diversification of the sampled species in addition to the occasional gene flow that might have led to the hybrid origin of some sky island species, similar to the species diversification of sea islands.