| A Comparative Analysis of B Chromosomes and Genetic Diversity in Maize （Zea mays L.） Landraces from Southwest China |
| |
| 引用本文： | YAO Qi-lun YANG Ke-cheng PAN Guang-tang RONG Ting-zhao. A Comparative Analysis of B Chromosomes and Genetic Diversity in Maize （Zea mays L.） Landraces from Southwest China[J]. 中国农业科学(英文版), 2007, 6(10): 1166-1172. DOI: 10.1016/S1671-2927(07)60160-6 |
| |
| 作者姓名： | YAO Qi-lun YANG Ke-cheng PAN Guang-tang RONG Ting-zhao |
| |
| 作者单位： | [1]Maize Research Institute, Sichuan Agricultural University, Yaan 625014, P.R.China [2]Department of Life Science, Yangtze Normal University, Fuling 408003, P.R. China |
| |
| 基金项目： | 国家高技术研究发展计划(863计划);教育部长江学者和创新团队发展计划 |
| |
| 摘 要： | The number of B chromosomes （Bs） in 54 maize landraces from Southwest China was tested by means of cytological observations. Nine landraces with Bs were observed. A map, showing the geographic distribution of the landraces with Bs, was plotted. It was found that southeastern Sichuan Province in China was the main distribution area of the landraces with Bs in Southwest China. In order to obtain information on relationships between Bs and genetic variation, genetic diversity both among and within 11 landraces was evaluated. For each SSR marker, the number of alleles ranged from 3 to 12 with an average of 7.86, which revealed a high level of genetic diversity among maize landraces in Southwest China. Based on SSRs data, higher genetic variation was found in the landraces with 2B, and the genetic distance between the landraces with and without Bs was higher. The results together with the principal component analysis （PCA） supported the hypothesis that maize landraces in Southwest China were first introduced to the middle part of southwest Sichuan, China. At the same time, the effect of Bs on genetic variation was discussed.
|
| 关 键 词： | B染色体 遗传的多样性 玉米色的兰德瑞斯猪 SSR记分员 |
| 收稿时间： | 2006-12-30 |
| 修稿时间： | 2006-12-30 |
A Comparative Analysis of B Chromosomes and Genetic Diversity in Maize (Zea mays L.) Landraces from Southwest China |
| |
| YAO Qi-lun,YANG Ke-cheng,PAN Guang-tang,RONG Ting-zhao. A Comparative Analysis of B Chromosomes and Genetic Diversity in Maize (Zea mays L.) Landraces from Southwest China[J]. 《Agricultural Sciences in China》, 2007, 6(10): 1166-1172. DOI: 10.1016/S1671-2927(07)60160-6 |
| |
| Authors: | YAO Qi-lun YANG Ke-cheng PAN Guang-tang RONG Ting-zhao |
| |
| Affiliation: | 1. Maize Research Institute, Sichuan Agricultural University, Yaan 625014, P.R. China;Department of Life Science, Yangtze Normal University, Fuling 408003, P.R. China
2. Maize Research Institute, Sichuan Agricultural University, Yaan 625014, P.R. China |
| |
| Abstract: | The number of B chromosomes (Bs) in 54 maize landraces from Southwest China was tested by means of cytological observations. Nine landraces with Bs were observed. A map, showing the geographic distribution of the landraces with Bs, was plotted. It was found that southeastern Sichuan Province in China was the main distribution area of the landraces with Bs in Southwest China. In order to obtain information on relationships between Bs and genetic variation, genetic diversity both among and within 11 landraces was evaluated. For each SSR marker, the number of alleles ranged from 3 to 12 with an average of 7.86, which revealed a high level of genetic diversity among maize landraces in Southwest China.Based on SSRs data, higher genetic variation was found in the landraces with 2B, and the genetic distance between the landraces with and without Bs was higher. The results together with the principal component analysis (PCA) supported the hypothesis that maize landraces in Southwest China were first introduced to the middle part of southwest Sichuan, China. At the same time, the effect of Bs on genetic variation was discussed. |
| |
| Keywords: | Bs genetic diversity maize landraces SSR markers |
| 本文献已被 维普 万方数据 ScienceDirect 等数据库收录！ |
|
