Salomon, Björn
- Department of Crop Science, Swedish University of Agricultural Sciences
Abstract
Morphological similarity among E. trachycaulus, E. virescens, E. violaceus, and E. hyperarcticus has often been noted. Taxonomists have tried to discriminate among these taxa using morphological characters and a number of different relationships among them have been suggested. However, the genetic relationships among these taxa are still unknown. AFLP analysis was used to characterize the molecular diversity of these taxa and to examine genetic relationships among them. A high degree of genetic identity was apparent among 7 accessions of E. virescens. The similarity values ranged from 0.90 to 0.99 with an average of 0.94. The mean similarity values among 3 E. hyperarcticus and among 5 E. violaceus accessions were 0.84 (0.81-0.87) and 0.77 (0.66-0.90), respectively. The similarity values among 17 E. trachycaulus accessions ranged from 0.49 to 0.92 with an average of 0.75. The 5 accessions of E. subsecundus displayed high variation, with similarity values between 0.52 and 0.68 and a mean value of 0.59. Both maximum-parsimony (MP) and neighbor-oining (NJ) analyses showed that all 7 accessions of E. virescens formed a clade, indicating a monophyletic origin. On the other hand, Elymus trachycaulus, E. subsecundus, and E. violaceus were each paraphyletic and separated into different genetically distinct groups. Among these 5 taxa, E. virescens was genetically similar to E. trachycaulus, and E. violaceus was genetically similar to E. hyperarcticus.
Keywords
AFLP; Elymus; genetic diversity; genetic relationship
Published in
Genome
2006, volume: 49, number: 9, pages: 1160-1169
Publisher: NATL RESEARCH COUNCIL CANADA-N R C RESEARCH PRESS
SLU Authors
UKÄ Subject classification
Environmental Sciences and Nature Conservation
Landscape Architecture
Horticulture
Publication identifier
- DOI: https://doi.org/10.1139/G06-062
Permanent link to this page (URI)
https://res.slu.se/id/publ/11205