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Genetic structure and eco-geographical adaptation of garlic landraces (Allium sativum L.) in Iran

Shaaf, Salar; Sharma, Rajiv; Kilian, Benjamin; Walther, Alexander; Özkan, Hakan; Karami, Ezzat and Mohammadi, Bahram (2014) In Genetic Resources and Crop Evolution 61(8). p.1565-1580
Abstract
In this study we present the genetic analysis of freshly collected garlic landraces (Allium sativum L.) along an eco-geographical transect from northeastern to western Iran covering seven different provinces using ISSR and RAPD markers. A total of 52 polymorphic loci were detected among 31 landrace populations. The percentage of polymorphic bands, the mean effective number of alleles, and the mean gene diversity were 38.82 %, 1.54, and 0.32, respectively. Genetic principal co-ordinate analysis and Structure analysis using 52 polymorphic loci indicated that the germplasm could be divided into two major groups. Principal component analysis (PCA), using geographical and environmental variables suggested the role of both geographical and... (More)
In this study we present the genetic analysis of freshly collected garlic landraces (Allium sativum L.) along an eco-geographical transect from northeastern to western Iran covering seven different provinces using ISSR and RAPD markers. A total of 52 polymorphic loci were detected among 31 landrace populations. The percentage of polymorphic bands, the mean effective number of alleles, and the mean gene diversity were 38.82 %, 1.54, and 0.32, respectively. Genetic principal co-ordinate analysis and Structure analysis using 52 polymorphic loci indicated that the germplasm could be divided into two major groups. Principal component analysis (PCA), using geographical and environmental variables suggested the role of both geographical and environmental adaptation in driving and maintaining genetic differentiation between the major groups. In addition, our results showed that the combination of latitude, altitude, and precipitation explains the highest proportion of the variance in the PCA of eco-geographical data. This study shows that geographical and environmental factors together created stronger and more discrete genetic differentiation than isolation by distance alone. These findings emphasize the importance of environmental selection in shaping patterns of genetic structure inferred in Iranian garlic germplasm. We suggest that action should be immediately taken for collecting, protecting and evaluating the genetic diversity of garlic landraces before they disappear in Iran. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Allium sativum, Climate, Environmental adaptation, Genetic structure, Iran, Isolation by distance
in
Genetic Resources and Crop Evolution
volume
61
issue
8
pages
1565 - 1580
publisher
Springer
external identifiers
  • Scopus:84911996306
ISSN
0925-9864
DOI
10.1007/s10722-014-0131-4
project
MERGE
language
English
LU publication?
no
id
12893835-b4f6-4c7a-9253-032935d4bc0b (old id 7515433)
date added to LUP
2015-07-08 14:53:31
date last changed
2016-10-13 04:36:02
@misc{12893835-b4f6-4c7a-9253-032935d4bc0b,
  abstract     = {In this study we present the genetic analysis of freshly collected garlic landraces (Allium sativum L.) along an eco-geographical transect from northeastern to western Iran covering seven different provinces using ISSR and RAPD markers. A total of 52 polymorphic loci were detected among 31 landrace populations. The percentage of polymorphic bands, the mean effective number of alleles, and the mean gene diversity were 38.82 %, 1.54, and 0.32, respectively. Genetic principal co-ordinate analysis and Structure analysis using 52 polymorphic loci indicated that the germplasm could be divided into two major groups. Principal component analysis (PCA), using geographical and environmental variables suggested the role of both geographical and environmental adaptation in driving and maintaining genetic differentiation between the major groups. In addition, our results showed that the combination of latitude, altitude, and precipitation explains the highest proportion of the variance in the PCA of eco-geographical data. This study shows that geographical and environmental factors together created stronger and more discrete genetic differentiation than isolation by distance alone. These findings emphasize the importance of environmental selection in shaping patterns of genetic structure inferred in Iranian garlic germplasm. We suggest that action should be immediately taken for collecting, protecting and evaluating the genetic diversity of garlic landraces before they disappear in Iran.},
  author       = {Shaaf, Salar and Sharma, Rajiv and Kilian, Benjamin and Walther, Alexander and Özkan, Hakan and Karami, Ezzat and Mohammadi, Bahram},
  issn         = {0925-9864},
  keyword      = {Allium sativum,Climate,Environmental adaptation,Genetic structure,Iran,Isolation by distance},
  language     = {eng},
  number       = {8},
  pages        = {1565--1580},
  publisher    = {ARRAY(0x943f8f0)},
  series       = {Genetic Resources and Crop Evolution},
  title        = {Genetic structure and eco-geographical adaptation of garlic landraces (Allium sativum L.) in Iran},
  url          = {http://dx.doi.org/10.1007/s10722-014-0131-4},
  volume       = {61},
  year         = {2014},
}