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Studies in the Melica ciliata-complex: 1. Distribution of allozyme variation within and among individuals, populations and geographic regions

Tyler, Torbjörn LU (2004) In Plant Systematics and Evolution 248(1-4). p.1-30
Abstract
Allozyme variation in 83 European populations of the Melica ciliata/transsilvanica species complex has been investigated. In spite of a diploid chromosome number, most loci were duplicated and patterns of within-population variation were not explainable unless apomixis or uncommon patterns of chromosomal segregation were assumed. Allelic richness and genetic diversity were very high but most of the variation (55-98%) was due to population differentiation. Geographic patterns were analysed both using phenetic, based on allele frequencies within populations, and cladistic, based on multi-locus genotypes, methods. Both methods congruently recognised three large groups of populations with discrete geographic distributions, in addition to a... (More)
Allozyme variation in 83 European populations of the Melica ciliata/transsilvanica species complex has been investigated. In spite of a diploid chromosome number, most loci were duplicated and patterns of within-population variation were not explainable unless apomixis or uncommon patterns of chromosomal segregation were assumed. Allelic richness and genetic diversity were very high but most of the variation (55-98%) was due to population differentiation. Geographic patterns were analysed both using phenetic, based on allele frequencies within populations, and cladistic, based on multi-locus genotypes, methods. Both methods congruently recognised three large groups of populations with discrete geographic distributions, in addition to a number of smaller groups. Of the three main groups, one was distributed in eastern and central Europe, one was restricted to western Europe north of the Alps and one was distributed in Iberia, Brittany and along the western shores of the Mediterranean. These groups are likely to have had separate histories but there appears to have been significant gene-flow among them. Among the less distinct groups, it was suggestive that some, e.g. the group containing all populations from the disjunct distribution in the Baltic basin, have been formed by introgression between the three major groups, whereas other deviating populations may represent additional distinct entities. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Plant Systematics and Evolution
volume
248
issue
1-4
pages
1 - 30
publisher
Springer
external identifiers
  • wos:000224527100001
  • scopus:6344255145
ISSN
1615-6110
DOI
10.1007/s00606-004-0169-4
language
English
LU publication?
yes
id
0af323a0-0751-4069-ba64-7810db587f76 (old id 137419)
date added to LUP
2007-07-02 15:37:14
date last changed
2017-01-01 04:51:55
@article{0af323a0-0751-4069-ba64-7810db587f76,
  abstract     = {Allozyme variation in 83 European populations of the Melica ciliata/transsilvanica species complex has been investigated. In spite of a diploid chromosome number, most loci were duplicated and patterns of within-population variation were not explainable unless apomixis or uncommon patterns of chromosomal segregation were assumed. Allelic richness and genetic diversity were very high but most of the variation (55-98%) was due to population differentiation. Geographic patterns were analysed both using phenetic, based on allele frequencies within populations, and cladistic, based on multi-locus genotypes, methods. Both methods congruently recognised three large groups of populations with discrete geographic distributions, in addition to a number of smaller groups. Of the three main groups, one was distributed in eastern and central Europe, one was restricted to western Europe north of the Alps and one was distributed in Iberia, Brittany and along the western shores of the Mediterranean. These groups are likely to have had separate histories but there appears to have been significant gene-flow among them. Among the less distinct groups, it was suggestive that some, e.g. the group containing all populations from the disjunct distribution in the Baltic basin, have been formed by introgression between the three major groups, whereas other deviating populations may represent additional distinct entities.},
  author       = {Tyler, Torbjörn},
  issn         = {1615-6110},
  language     = {eng},
  number       = {1-4},
  pages        = {1--30},
  publisher    = {Springer},
  series       = {Plant Systematics and Evolution},
  title        = {Studies in the Melica ciliata-complex: 1. Distribution of allozyme variation within and among individuals, populations and geographic regions},
  url          = {http://dx.doi.org/10.1007/s00606-004-0169-4},
  volume       = {248},
  year         = {2004},
}