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| Evaluation of Genetic Diversity of Sichuan Common Wheat Landraces in China by SSR Markers |
| LI Wei, BIAN Chun-mei, WEI Yu-ming, LIU An-jun, CHEN Guo-yue, PU Zhi-en, LIU Ya-xi, ZHENG You-liang |
1.Key Laboratory of Crop Genetic Resources and Improvement in Southwest China, Ministry of Education, Sichuan Agricultural University,Ya'an 625014, P.R.China
2.Triticeae Research Institute, Sichuan Agricultural University, Ya’an 625014, P.R.China
3.College of Agronomy, Sichuan Agricultural University, Ya’an 625014, P.R.China |
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摘要 Genetic diversity of 62 Sichuan wheat landraces accessions of China was investigated by agronomic traits and SSR markers. The landrace population showed the characters of higher tiller capability and more kernels/spike, especially tiller no./plant of six accessions was over 40 and kernels/spike of three accessions was more than 70. A total of 547 alleles in 124 polymorphic loci were detected with an average of 4.76 alleles per locus by 114 SSR markers. Parameters analysis indicated that the genetic diversity ranked as genome A> genome B > genome D, and the homoeologous groups ranked as 5>4>3>1>2>7>6 based on genetic richness (Ri). Furthermore, chromosomes 2A, 1B and 3D had more diversity than that of chromosomes 4A, 7A and 6B. The variation of SSR loci on chromosomes 1B, 2A, 2D, 3B, and 4B implied that, in the past, different selective pressures might have acted on different chromosome regions of these landraces. Our results suggested that Sichuan common wheat landraces is a useful genetic resource for genetic research and wheat improvement.
Abstract Genetic diversity of 62 Sichuan wheat landraces accessions of China was investigated by agronomic traits and SSR markers. The landrace population showed the characters of higher tiller capability and more kernels/spike, especially tiller no./plant of six accessions was over 40 and kernels/spike of three accessions was more than 70. A total of 547 alleles in 124 polymorphic loci were detected with an average of 4.76 alleles per locus by 114 SSR markers. Parameters analysis indicated that the genetic diversity ranked as genome A> genome B > genome D, and the homoeologous groups ranked as 5>4>3>1>2>7>6 based on genetic richness (Ri). Furthermore, chromosomes 2A, 1B and 3D had more diversity than that of chromosomes 4A, 7A and 6B. The variation of SSR loci on chromosomes 1B, 2A, 2D, 3B, and 4B implied that, in the past, different selective pressures might have acted on different chromosome regions of these landraces. Our results suggested that Sichuan common wheat landraces is a useful genetic resource for genetic research and wheat improvement.
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Received: 12 September 2012
Accepted:
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| Fund: This work was supported by the National Basic Research Program of China (2011CB100100) and the Program for Scientific Innovative Research Team in Sichuan, China (2011JTD0015 and 11TD005). |
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Corresponding Authors:
Correspondence ZHENG You-liang, Tel: +86-835-2882007, Fax: +86-835-2883153, E-mail: ylzheng@sicau.edu.cn
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Cite this article:
LI Wei, BIAN Chun-mei, WEI Yu-ming, LIU An-jun, CHEN Guo-yue, PU Zhi-en, LIU Ya-xi, ZHENG You-liang.
2013.
Evaluation of Genetic Diversity of Sichuan Common Wheat Landraces in China by SSR Markers. Journal of Integrative Agriculture, 12(9): 1501-1511.
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