| Genetic diversity revealed by genomic SSR and EST-SSR markers among common wheat, spelt and compectum |
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| 作者姓名： | YANG Xinquan LIU Peng HAN Zongfu NI Zhongfu SUN Qixin |
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| 作者单位： | Department of Plant Genetics & Breeding, State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094,China,Department of Plant Genetics & Breeding, State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094,China,Department of Plant Genetics & Breeding, State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094,China,Department of Plant Genetics & Breeding, State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094,China,Department of Plant Genetics & Breeding, State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094,China |
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| 基金项目： | Supported by National High-Tech Research Programs (Grant Nos. 2001AA241042 and 2002AA207004) and the Major State Basic Research Development Program of China (2001CB1088) |
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| 摘 要： | In this study, two SSR molecular markers, named genomic-SSR and EST-SSR, are used to measure the genetic diversity among three hexaploid wheat populations, which include 28 common wheat ( Triticum aestivum L. ), 13 spelt ( Triticum spelta L. ),and 11 compactum ( Triticum compactum Host. ). The results show that common wheat has the highest genetic polymorphism, followed by spelt and then compactum. The mean genetic distance between the populations is higher than that within a population, and similar tendency is detected for individual genomes A, B and D. Therefore, spelt and compactum can be used as potential germplasms for wheat breeding, especially for enriching the genetic variation in genome D. As compared with spelt, the genetic diversity between common wheat and compactum is much smaller, indicating a closer consanguine relationship between these two species. Although the polymorphism revealed by EST-SSR is lower than that by genomic-SSR, it can effectively differentiate diverse genotypes as well. Together with our present results, it is concluded that EST-SSR marker is an ideal marker for assessing the genetic diversity in wheat. Meanwhile, the origin and evolution of hexaploid wheat is also analyzed and discussed.
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| 关 键 词： | common wheat spelt copactum genomic-SSR EST-SSR gentic diversity |
Genetic diversity revealed by genomic SSR and EST-SSR markers among common wheat, spelt and compectum |
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| YANG Xinquan,LIU Peng,HAN Zongfu,NI Zhongfu,SUN Qixin.Genetic diversity revealed by genomic SSR and EST-SSR markers among common wheat, spelt and compectum[J].Progress in Natural Science,2005,15(1):24-33. |
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| Authors: | YANG Xinquan LIU Peng HAN Zongfu NI Zhongfu SUN Qixin |
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| Institution: | Department of Plant Genetics & Breeding, State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094,China,Department of Plant Genetics & Breeding, State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094,China,Department of Plant Genetics & Breeding, State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094,China,Department of Plant Genetics & Breeding, State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094,China,Department of Plant Genetics & Breeding, State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094,China |
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| Abstract: | In this study, two SSR molecular markers, named genomic-SSR and EST-SSR, are used to measure the genetic diversity among three hexaploid wheat populations, which include 28 common wheat ( Triticum aestivum L. ), 13 spelt ( Triticum spelta L. ),and 11 compactum ( Triticum compactum Host. ). The results show that common wheat has the highest genetic polymorphism, followed by spelt and then compactum. The mean genetic distance between the populations is higher than that within a population, and similar tendency is detected for individual genomes A, B and D. Therefore, spelt and compactum can be used as potential germplasms for wheat breeding, especially for enriching the genetic variation in genome D. As compared with spelt, the genetic diversity between common wheat and compactum is much smaller, indicating a closer consanguine relationship between these two species. Although the polymorphism revealed by EST-SSR is lower than that by genomic-SSR, it can effectively differentiate diverse genotypes as well. Together with our present results, it is concluded that EST-SSR marker is an ideal marker for assessing the genetic diversity in wheat. Meanwhile, the origin and evolution of hexaploid wheat is also analyzed and discussed. |
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| Keywords: | common wheat spelt copactum genomic-SSR EST-SSR gentic diversity |
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