Evolutionary history of two rare endemic conifer species from the eastern Qinghai-Tibet Plateau

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F21%3A00124398" target="_blank" >RIV/00216224:14740/21:00124398 - isvavai.cz</a>

Výsledek na webu

<a href="https://academic.oup.com/aob/article-abstract/128/7/903/6362643?redirectedFrom=fulltext" target="_blank" >https://academic.oup.com/aob/article-abstract/128/7/903/6362643?redirectedFrom=fulltext</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/aob/mcab114" target="_blank" >10.1093/aob/mcab114</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evolutionary history of two rare endemic conifer species from the eastern Qinghai-Tibet Plateau

Popis výsledku v původním jazyce

Background and Aims Understanding the population genetics and evolutionary history of endangered species is urgently needed in an era of accelerated biodiversity loss. This knowledge is most important for regions with high endemism that are ecologically vulnerable, such as the Qinghai-Tibet Plateau (QTP). Methods The genetic variation of 84 juniper trees from six populations of Juniperus microsperma and one population of Juniperus erectopatens, two narrow-endemic junipers from the QTP that are sister to each other, was surveyed using RNA-sequencing data. Coalescent-based analyses were used to test speciation. migration and demographic scenarios. Furthermore. positively selected and climate-associated genes were identified, and the genetic load was assessed for both species. Key Results Analyses of 149 052 single nucleotide polymorphisms showed that the two species arc well differentiated and monophyletic. They diverged around the late Pliocene. but interspecific gene flow continued until the Last Glacial Maximwn. Demographic reconstruction by Stairway Plot detected two severe bottlenecks for J. microsperma but only one for J. erectopaens. The identified positively selected genes and climate-associated genes revealed habitat adaptation of the two species. Furthermore, although J. microsperma had a much wider geographical distribution than J. erectopatens, the former possesses lower genetic diversity and a higher genetic load than the latter. Conclusions This study sheds light on the evolution of two endemic juniper species from the QTP and their responses to Quaternary climate fluctuations. Our findings emphasize the importance of speciation and demographic history reconstructions in understanding the current distribution pattern and genetic diversity of threatened species in mountainous regions.

Název v anglickém jazyce

Evolutionary history of two rare endemic conifer species from the eastern Qinghai-Tibet Plateau

Popis výsledku anglicky

Background and Aims Understanding the population genetics and evolutionary history of endangered species is urgently needed in an era of accelerated biodiversity loss. This knowledge is most important for regions with high endemism that are ecologically vulnerable, such as the Qinghai-Tibet Plateau (QTP). Methods The genetic variation of 84 juniper trees from six populations of Juniperus microsperma and one population of Juniperus erectopatens, two narrow-endemic junipers from the QTP that are sister to each other, was surveyed using RNA-sequencing data. Coalescent-based analyses were used to test speciation. migration and demographic scenarios. Furthermore. positively selected and climate-associated genes were identified, and the genetic load was assessed for both species. Key Results Analyses of 149 052 single nucleotide polymorphisms showed that the two species arc well differentiated and monophyletic. They diverged around the late Pliocene. but interspecific gene flow continued until the Last Glacial Maximwn. Demographic reconstruction by Stairway Plot detected two severe bottlenecks for J. microsperma but only one for J. erectopaens. The identified positively selected genes and climate-associated genes revealed habitat adaptation of the two species. Furthermore, although J. microsperma had a much wider geographical distribution than J. erectopatens, the former possesses lower genetic diversity and a higher genetic load than the latter. Conclusions This study sheds light on the evolution of two endemic juniper species from the QTP and their responses to Quaternary climate fluctuations. Our findings emphasize the importance of speciation and demographic history reconstructions in understanding the current distribution pattern and genetic diversity of threatened species in mountainous regions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Annals of Botany

ISSN

0305-7364

e-ISSN

—

Svazek periodika

128

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

16

Strana od-do

903-918

Kód UT WoS článku

000743322200009

EID výsledku v databázi Scopus

2-s2.0-85121150587