NDLI: Evaluation of geographic distribution of high-molecular-weight glutenin subunits (HMW-GS) in wild and cultivated Triticum species

Content Provider	Springer Nature Link
Author	Li, Wei Wei, Yu Ming Xu, Li Li Liu, An Jun Sheng, Yu Zhen Pu, Zhi En Cheng, Guo Yue Zheng, You Liang
Copyright Year	2014
Abstract	Variation of high-molecular-weight glutenin subunit (HMW-GS) in 632 wild and cultivated Triticum accessions was investigated by sodium dodecyl sulfate polyacrylamide gel electrophoresis. A total of 11 alleles of HMW-GS in diploid species, 22 in tetraploid species, and 15 in hexaploid species were detected. Diploid species on Glu-1A locus and tetraploid species Glu-1B locus showed the highest diversity, respectively. Tetraploid species had the highest level of diversity on three Glu-1 loci, followed by hexaploid and diploid, based on Shannon’s information index, Nei’s genetic diversity, and percentage of polymorphic loci. Molecular variance analysis confirmed main variance of HMW-GS within species, regions, and locations, respectively. Variance among species and regions was enhanced gradually with the increase of ploidy. Significant non-random distributions between the phylogenic trees of HMW-GS and the locations of accessions were tested by GenGIS software, indicated that geographic factors played an important role along the different orientations in the spread of Triticum species. We found one original diversified center in diploid what located around Elazig, Malatya, Gaziantep, Urfa, and Kiziltepe in Turkey, and three diversified centers in tetraploid wheat, including Turkey–Armenia–Georgia–Iran, Portugal–Spain, and Ethiopia, respectively, and two diversified adjacent areas between Turkey and Switzerland and around Turkey, Georgia, and Armenia. The original center of diploid species located in southeast Turkey, where the unexpressed 1Ay subunit was mainly distributed in T. urartu, could be one of the candidate regions of polyploidization of Triticum L. The regional distribution of HMW-GS and species also provided geographic evidences for the existence of founder effect on the spread of Triticum species. The present study suggests that integrating genetic diversity with geographic characterization in Triticum could very useful for collection, conservation, and utilization, as well as for research microevolution and domestication.
Starting Page	1105
Ending Page	1119
Page Count	15
File Format	PDF
ISSN	09259864
Journal	Genetic Resources and Crop Evolution
Volume Number	61
Issue Number	6
e-ISSN	15735109
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-02-26
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Genetic diversity GenGIS Geographic distribution HMW-GS Triticum L. Plant Sciences Plant Systematics/Taxonomy/Biogeography Plant Genetics & Genomics Plant Physiology Agriculture
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Ecology, Evolution, Behavior and Systematics Agronomy and Crop Science

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