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The importance of sexual and asexual reproduction in the recent evolution of Allium vineale

Ceplitis, Alf LU (2001) In Evolution 55(8). p.1581-1591
Abstract
In the weedy plant species Allium vineale (wild garlic), individuals may simultaneously produce sexually and asexually derived offspring, by seed and bulbils, respectively. In this study, genetic and genotypic diversity was determined in samples from 14 European A. vineale populations using nuclear (RAPD) and cytoplasmic (PCR-RFLP of cpDNA) markers to investigate the importance of the different reproductive modes. In the whole sample, 77 nuclear multilocus genotypes and four chloroplast haplotypes (chlorotypes) were found. Populations exhibited a high degree of subdivision for nuclear and cytoplasmic markers as estimated from hierarchical F-statistics; at the same time, identical chlorotypes could be found in populations separated by large... (More)
In the weedy plant species Allium vineale (wild garlic), individuals may simultaneously produce sexually and asexually derived offspring, by seed and bulbils, respectively. In this study, genetic and genotypic diversity was determined in samples from 14 European A. vineale populations using nuclear (RAPD) and cytoplasmic (PCR-RFLP of cpDNA) markers to investigate the importance of the different reproductive modes. In the whole sample, 77 nuclear multilocus genotypes and four chloroplast haplotypes (chlorotypes) were found. Populations exhibited a high degree of subdivision for nuclear and cytoplasmic markers as estimated from hierarchical F-statistics; at the same time, identical chlorotypes could be found in populations separated by large distances. Genotypic diversity was significantly lower than expected under free recombination in almost all populations, indicating that recruitment into populations is mostly by asexually produced offspring. Nevertheless. within each chlorotype, the distribution of markers from pairs of nuclear loci was incompatible with a purely clonal structure, suggesting that many multilocus genotypes have originated by sexual recombination rather than by mutation within asexual lineages. It is argued that the weedy habit of A. vineale is likely to have favored bulbil reproduction, whereas sexually generated genotypes may have facilitated local adaptation during the species' expansion across Europe. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
character incompatibility, chloroplast DNA, Allium vineale, genotypic diversity, sexual reproduction
in
Evolution
volume
55
issue
8
pages
1581 - 1591
publisher
Wiley-Blackwell
external identifiers
  • scopus:0034789250
ISSN
1558-5646
language
English
LU publication?
yes
id
ad80aece-028a-4ca3-a0ef-a5e2bb9e790d (old id 1292323)
alternative location
http://www.bioone.org/doi/pdf/10.1554/0014-3820(2001)055%5B1581%3ATIOSAA%5D2.0.CO%3B2
date added to LUP
2009-02-09 13:44:16
date last changed
2018-10-14 03:33:49
@article{ad80aece-028a-4ca3-a0ef-a5e2bb9e790d,
  abstract     = {In the weedy plant species Allium vineale (wild garlic), individuals may simultaneously produce sexually and asexually derived offspring, by seed and bulbils, respectively. In this study, genetic and genotypic diversity was determined in samples from 14 European A. vineale populations using nuclear (RAPD) and cytoplasmic (PCR-RFLP of cpDNA) markers to investigate the importance of the different reproductive modes. In the whole sample, 77 nuclear multilocus genotypes and four chloroplast haplotypes (chlorotypes) were found. Populations exhibited a high degree of subdivision for nuclear and cytoplasmic markers as estimated from hierarchical F-statistics; at the same time, identical chlorotypes could be found in populations separated by large distances. Genotypic diversity was significantly lower than expected under free recombination in almost all populations, indicating that recruitment into populations is mostly by asexually produced offspring. Nevertheless. within each chlorotype, the distribution of markers from pairs of nuclear loci was incompatible with a purely clonal structure, suggesting that many multilocus genotypes have originated by sexual recombination rather than by mutation within asexual lineages. It is argued that the weedy habit of A. vineale is likely to have favored bulbil reproduction, whereas sexually generated genotypes may have facilitated local adaptation during the species' expansion across Europe.},
  author       = {Ceplitis, Alf},
  issn         = {1558-5646},
  keyword      = {character incompatibility,chloroplast DNA,Allium vineale,genotypic diversity,sexual reproduction},
  language     = {eng},
  number       = {8},
  pages        = {1581--1591},
  publisher    = {Wiley-Blackwell},
  series       = {Evolution},
  title        = {The importance of sexual and asexual reproduction in the recent evolution of Allium vineale},
  volume       = {55},
  year         = {2001},
}