Allelic variation and genetic diversity of high molecular weight glutenin subunit in Chinese endemic wheats (Triticum aestivum L.) |
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Authors: | Jingye Fang Yong Liu Jie Luo Yuesheng Wang Peter R Shewry and Guangyuan He |
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Institution: | (1) Key Laboratory of Molecular Biophysics, Ministry of Education, China-UK HUST-RRes Genetic Engineering and Genomics Joint Laboratory, Huazhong University of Science and Technology (HUST), Wuhan, 430074, People’s Republic of China;(2) Rothamsted Research (RRes), Harpenden, Hertfordshire, AL5 2JQ, UK |
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Abstract: | The high molecular weight glutenin subunit (HMW-GS) compositions of 66 Chinese endemic wheats were determined by sodium dodecyl
sulphate polyacrylamide gel electrophoresis (SDS-PAGE). Ten alleles at the Glu-1 loci were detected in 50 Tibetan weedrace wheat accessions which in combination resulted in seven different HMW-GS patterns.
Four HMW-GS patterns were observed among 10 Yunnan hulled wheat accessions, and two patterns in six Xingjiang rice wheat accessions.
Two novel alleles (Bx7** + By8, Bx7 + By8**) and two rare alleles (Dx2 + 1Dy12*, Dx2 + null) were found in Tibetan weedrace
accessions, with one of the latter (Dx2 + Dy12*) also being found in Yunnan hulled wheat. The mean indices of genetic variation
at the Glu-1 loci in Yunnan hulled wheat, Tibetan weedrace wheat and Xingjiang rice wheat were 0.2232, 0.1655 and 0.0926, respectively,
showing that Yunnan hulled wheat and Tibetan weedrace wheat had higher genetic variation than Xingjiang rice wheat. |
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Keywords: | HMW-GS Genetic diversity Tibetan weedrace wheat Xingjiang rice wheat Yunnan hulled wheat |
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