Genetic structure in patchy populations of a candidate foundation plant: a case study of Leymus chinensis using genetic and clonal diversity

2021 ◽  
Author(s):  
Jian Guo ◽  
Christina L. Richards ◽  
Kent E. Holsinger ◽  
Gordon A. Fox ◽  
Zhuo Zhang ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Clonal Diversity ◽  
Leymus Chinensis ◽  
Patchy Populations

scholarly journals Genetic structure in patchy populations of a candidate foundation plant: a case study of Leymus chinensis (Poaceae) using genetic and clonal diversity

2021 ◽  
Author(s):  
Jian Guo ◽  
Christina L. Richards ◽  
Kent E. Holsinger ◽  
Gordon A. Fox ◽  
Zhuo Zhang ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Sexual Reproduction ◽  
Clustering Algorithm ◽  
Clonal Diversity ◽  
Leymus Chinensis ◽  
Ecological Communities ◽  
Genetic Diversity And Structure ◽  
Limited Dispersal ◽  
Almost All

PREMISE: The distribution of genetic diversity on the landscape has critical ecological and evolutionary implications. This may be especially the case on a local scale for foundation plant species since they create and define ecological communities, contributing disproportionately to ecosystem function. METHODS: We examined the distribution of genetic diversity and clones, which we defined first as unique multi-locus genotypes (MLG), and then by grouping similar MLGs into multi-locus lineages (MLL). We used 186 markers from inter-simple sequence repeats (ISSR) across 358 ramets from 13 patches of the foundation grass Leymus chinensis. We examined the relationship between genetic and clonal diversities, their variation with patch-size, and the effect of the number of markers used to evaluate genetic diversity and structure in this species. RESULTS: Every ramet had a unique MLG. Almost all patches consisted of individuals belonging to a single MLL. We confirmed this with a clustering algorithm to group related genotypes. The predominance of a single lineage within each patch could be the result of the accumulation of somatic mutations, limited dispersal, some sexual reproduction with partners mainly restricted to the same patch, or a combination of all three. CONCLUSIONS: We found strong genetic structure among patches of L. chinensis. Consistent with previous work on the species, the clustering of similar genotypes within patches suggests that clonal reproduction combined with somatic mutation, limited dispersal, and some degree of sexual reproduction among neighbors causes individuals within a patch to be more closely related than among patches.

scholarly journals Genetic structure and clonal diversity of an introduced pest in Chile, the cereal aphid Sitobion avenae

Heredity ◽  
2005 ◽  
Vol 95 (1) ◽  
pp. 24-33 ◽  
Author(s):  
C C Figueroa ◽  
J-C Simon ◽  
J-F Le Gallic ◽  
N Prunier-Leterme ◽  
L M Briones ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Clonal Diversity ◽  
Sitobion Avenae ◽  
Cereal Aphid ◽  
Introduced Pest

A Case Study of Genetic Structure in a Plant Metapopulation

1997 ◽  
pp. 429-454 ◽  
Author(s):  
Barbara E. Giles ◽  
Jér ome^Goudet
Keyword(s):  
Genetic Structure

scholarly journals Genetic structure of regional water vole populations and footprints of reintroductions: a case study from southeast England

2020 ◽  
Vol 21 (3) ◽  
pp. 531-546
Author(s):  
Rowenna J. Baker ◽  
Dawn M. Scott ◽  
Peter J. King ◽  
Andrew D. J. Overall
Keyword(s):  
Genetic Structure ◽  
Water Vole ◽  
Regional Water

scholarly journals Is urbanization scrambling the genetic structure of human populations? A case study

Heredity ◽  
2006 ◽  
Vol 98 (3) ◽  
pp. 151-156 ◽  
Author(s):  
M Ashrafian-Bonab ◽  
L J Lawson Handley ◽  
F Balloux
Keyword(s):  
Genetic Structure ◽  
Human Populations

Genetic structure along a gaseous organic pollution gradient: a case study with Poa annua L.

2003 ◽  
Vol 124 (3) ◽  
pp. 449-455 ◽  
Author(s):  
Xiao-yong Chen ◽  
Ning Li ◽  
Lang Shen ◽  
Yuan-yuan Li
Keyword(s):  
Genetic Structure ◽  
Organic Pollution ◽  
Poa Annua ◽  
Pollution Gradient

scholarly journals Genetic Structure of Sympatric Sexually and Parthenogenetically Reproducing Population of Chara canescens (Charophyta)

ISRN Ecology ◽  
2011 ◽  
Vol 2011 ◽  
pp. 1-13 ◽  
Author(s):  
Ralf Schaible ◽  
Ingo Bergmann ◽  
Hendrik Schubert
Keyword(s):  
Genetic Structure ◽  
Population Genetic ◽  
Genotypic Variation ◽  
Clonal Diversity ◽  
Female Offspring ◽  
Short Term ◽  
Assignment Method ◽  
Nuclear Species ◽  
Species Specific ◽  
Bayesian Assignment

Individuals that reproduce parthenogenetically do not have to produce males and can therefore produce twice as many female offspring. With this twofold reproduction advantage of asexual reproduction, the question of how sex persists in the short term remains unresolved. In the dioecious charophyte Chara canescens, both parthenogenetically reproducing females and sexually reproducing females and males occur sympatrically at only one site in Europe: Neusiedler See-Seewinkel (Austria). By means of four nuclear species-specific microsatellite loci, we examined the interaction between coexisting sexuals and parthenogens by analysing the population structure and gene flow between both reproduction systems. Using a Bayesian assignment method, we found that the sites encompassed two genetically distinct clusters of individuals. The first cluster included genotypes of sexual individuals, which are genetically distinct from a second cluster which included parthenogenetic individuals and few sexually reproducing males, which are genetically identical to the parthenogenetic individuals. However, an analysis of the population genetic structure found no differences with respect to genotypic variation, clonal diversity, and population differentiation between the sympatric parthenogenetically and the sexually reproducing populations. The results indicated that the parthenogenetic individuals cannot outcompete the sexually reproducing individuals.

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