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Phylogeography of Artemisia frigida (Anthemideae, Asteraceae) based on genotyping‐by‐sequencing and plastid DNA data: Migration through Beringia.

Authors :
Oyundelger, Khurelpurev
Harpke, Dörte
Herklotz, Veit
Troeva, Elena
Zheng, Zhenzhen
Li, Zheng
Oyuntsetseg, Batlai
Wagner, Viktoria
Wesche, Karsten
Ritz, Christiane M.
Source :
Journal of Evolutionary Biology. Jan2022, Vol. 35 Issue 1, p64-80. 17p.
Publication Year :
2022

Abstract

Artemisia frigida is a temperate grassland species that has the largest natural range among its genus, with occurrences across the temperate grassland biomes of Eurasia and North America. Despite its wide geographic range, we know little about the species' distribution history. Hence, we conducted a phylogeographical study to test the hypothesis that the species' distribution pattern is related to a potential historical migration over the 'Bering land bridge'. We applied two molecular approaches: genotyping‐by‐sequencing (GBS) and Sanger sequencing of the plastid intergenic spacer region (rpl32 – trnL) to investigate genetic differentiation and relatedness among 21 populations from North America, Middle Asia, Central Asia and the Russian Far East. Furthermore, we identified the ploidy level of individuals based on GBS data. Our results indicate that A. frigida originated in Asia, spread northwards to the Far East and then to North America across the Bering Strait. We found a pronounced genetic structuring between Middle and Central Asian populations with mixed ploidy levels, tetraploids in the Far East, and nearly exclusively diploids in North America except for one individual. According to phylogenetic analysis, two populations of Kazakhstan (KZ2 and KZ3) represent the most likely ancestral diploids that constitute the basally branching lineages, and subsequent polyploidization has occurred on several occasions independently. Mantel tests revealed weak correlations between genetic distance and geographical distance and climatic conditions, which indicates that paleoclimatic fluctuations may have more profoundly influenced A. frigida's spatial genetic structure and distribution than the current environment. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
1010061X
Volume :
35
Issue :
1
Database :
Academic Search Index
Journal :
Journal of Evolutionary Biology
Publication Type :
Academic Journal
Accession number :
154863454
Full Text :
https://doi.org/10.1111/jeb.13960