Advanced

Genetic structure in parasitic Rhinanthus angustifolius is determined by geographical distance rather than habitat – implications for taxonomy and conservation

Jonstrup, Anneli LU ; Andersson, Stefan LU and Hedrén, Mikael LU (2018) In Nordic Journal of Botany 36(12).
Abstract

Analyses of intraspecific genetic structure can promote the conservation of genetic diversity of rare or declining plant species by enabling identification of proper management units. Here we investigate the genetic structure of the annual hemiparasitic herb Rhinanthus angustifolius to evaluate the genetic distinctness of two currently described subspecies and three habitat-related groups of populations inferred from recent common-garden data. Data from 11 nuclear microsatellite loci, obtained from 17 southern Swedish populations of R. angustifolius, were analyzed with a variety of population genetic techniques to examine how intraspecific genetic structure relates to taxonomy, habitat and geography. Neither the two subspecies nor the... (More)

Analyses of intraspecific genetic structure can promote the conservation of genetic diversity of rare or declining plant species by enabling identification of proper management units. Here we investigate the genetic structure of the annual hemiparasitic herb Rhinanthus angustifolius to evaluate the genetic distinctness of two currently described subspecies and three habitat-related groups of populations inferred from recent common-garden data. Data from 11 nuclear microsatellite loci, obtained from 17 southern Swedish populations of R. angustifolius, were analyzed with a variety of population genetic techniques to examine how intraspecific genetic structure relates to taxonomy, habitat and geography. Neither the two subspecies nor the three recently identified population groups formed genetically coherent lineages. Rather, there was a clear isolation-by-distance pattern, pointing to a major role of geographically restricted gene flow in structuring the diversity at the putatively neutral microsatellite loci. Although uncertainties remain regarding the influence of homoplasy and possible introgression from the closely related R. minor, our microsatellite data argue against the recognition of previously identified subspecies or population groups as management units for conservation purposes. As currently described entities do not contain much unique genetic variation, we recommend conserving populations from a large geographical range, rather than populations from specific habitats, to preserve the long-term evolutionary potential of the species.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
conservation, genetic structure, local adaptation
in
Nordic Journal of Botany
volume
36
issue
12
publisher
Board of the Nordic Journal of Botany
external identifiers
  • scopus:85059020092
ISSN
0107-055X
DOI
10.1111/njb.01941
language
English
LU publication?
yes
id
c22cae32-60fe-4b6f-888b-1e2188144ae0
date added to LUP
2019-01-03 14:05:37
date last changed
2019-02-20 11:41:24
@article{c22cae32-60fe-4b6f-888b-1e2188144ae0,
  abstract     = {<p>Analyses of intraspecific genetic structure can promote the conservation of genetic diversity of rare or declining plant species by enabling identification of proper management units. Here we investigate the genetic structure of the annual hemiparasitic herb Rhinanthus angustifolius to evaluate the genetic distinctness of two currently described subspecies and three habitat-related groups of populations inferred from recent common-garden data. Data from 11 nuclear microsatellite loci, obtained from 17 southern Swedish populations of R. angustifolius, were analyzed with a variety of population genetic techniques to examine how intraspecific genetic structure relates to taxonomy, habitat and geography. Neither the two subspecies nor the three recently identified population groups formed genetically coherent lineages. Rather, there was a clear isolation-by-distance pattern, pointing to a major role of geographically restricted gene flow in structuring the diversity at the putatively neutral microsatellite loci. Although uncertainties remain regarding the influence of homoplasy and possible introgression from the closely related R. minor, our microsatellite data argue against the recognition of previously identified subspecies or population groups as management units for conservation purposes. As currently described entities do not contain much unique genetic variation, we recommend conserving populations from a large geographical range, rather than populations from specific habitats, to preserve the long-term evolutionary potential of the species.</p>},
  articleno    = {e01941},
  author       = {Jonstrup, Anneli and Andersson, Stefan and Hedrén, Mikael},
  issn         = {0107-055X},
  keyword      = {conservation,genetic structure,local adaptation},
  language     = {eng},
  number       = {12},
  publisher    = {Board of the Nordic Journal of Botany},
  series       = {Nordic Journal of Botany},
  title        = {Genetic structure in parasitic Rhinanthus angustifolius is determined by geographical distance rather than habitat – implications for taxonomy and conservation},
  url          = {http://dx.doi.org/10.1111/njb.01941},
  volume       = {36},
  year         = {2018},
}