Population genetic structure of two Medicago species shaped by distinct life form, mating system and seed dispersal
文献类型：期刊论文
| 作者 | Yan, Juan1,2; Chu, Hai-Jia1,2; Wang, Heng-Chang2; Li, Jian-Qiang2; Sang, Tao3 |
| 刊名 | ANNALS OF BOTANY
 |
| 出版日期 | 2009-04-01 |
| 卷号 | 103期号:6页码:825-834 |
| 关键词 | Medicago lupulina Medicago ruthenica microsatellite genetic diversity gene flow forage legume |
| ISSN号 | 0305-7364 |
| DOI | 10.1093/aob/mcp006 |
| 英文摘要 | Life form, mating system and seed dispersal are important adaptive traits of plants. In the first effort to characterize in detail the population genetic structure and dynamics of wild Medicago species in China, a population genetic study of two closely related Medicago species, M. lupulina and M. ruthenica, that are distinct in these traits, are reported. These species are valuable germplasm resources for the improvement of Medicago forage crops but are under threat of habitat destruction. Three hundred and twenty-eight individuals from 16 populations of the annual species, M. lupulina, and 447 individuals from 15 populations of the perennial species, M. ruthenica, were studied using 15 and 17 microsatellite loci, respectively. Conventional and Bayesian-clustering analyses were utilized to estimate population genetic structure, mating system and gene flow. Genetic diversity of M. lupulina (mean H(E) = 0.246) was lower than that of M. ruthenica (mean H(E) = 0.677). Populations of M. lupulina were more highly differentiated (F(ST) = 0.535) than those of M. ruthenica (F(ST) = 0.130). For M. lupulina, 55.5 % of the genetic variation was partitioned among populations, whereas 76.6 % of the variation existed within populations of M. ruthenica. Based on the genetic data, the selfing rates of M. lupulina and M. ruthenica were estimated at 95.8 % and 29.5 %, respectively. The genetic differentiation among populations of both species was positively correlated with geographical distance. The mating system differentiation estimated from the genetic data is consistent with floral morphology and observed pollinator visitation. There was a much higher historical gene flow in M. ruthenica than in M. lupulina, despite more effective seed dispersal mechanisms in M. lupulina. The population genetic structure and geographical distribution of the two Medicago species have been shaped by life form, mating systems and seed dispersal mechanisms. |
| 资助项目 | Chinese Academy of Sciences |
| WOS研究方向 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000264387600002 |
| 出版者 | OXFORD UNIV PRESS |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/1045]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Li, Jian-Qiang |
| 作者单位 | 1.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Wuhan Bot Garden, Wuhan 430074, Peoples R China 3.Michigan State Univ, Dept Plant Biol, E Lansing, MI 48824 USA |
| 推荐引用方式 GB/T 7714 | Yan, Juan,Chu, Hai-Jia,Wang, Heng-Chang,et al. Population genetic structure of two Medicago species shaped by distinct life form, mating system and seed dispersal[J]. ANNALS OF BOTANY,2009,103(6):825-834. |
| APA | Yan, Juan,Chu, Hai-Jia,Wang, Heng-Chang,Li, Jian-Qiang,&Sang, Tao.(2009).Population genetic structure of two Medicago species shaped by distinct life form, mating system and seed dispersal.ANNALS OF BOTANY,103(6),825-834. |
| MLA | Yan, Juan,et al."Population genetic structure of two Medicago species shaped by distinct life form, mating system and seed dispersal".ANNALS OF BOTANY 103.6(2009):825-834. |
入库方式： OAI收割
来源：武汉植物园
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