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题名: Genetic origin and composition of a natural hybrid poplar Populus x jrtyschensis from two distantly related species
作者: Jiang, DC; Feng, JJ; Dong, M; Wu, GL; Mao, KS; Liu, JQ(刘建全)
收录类别: SCIE ; PubMed ; MEDLINE ; BIOSIS
出版日期: 2016-04-18
刊名: BMC PLANT BIOLOGY
卷号: 16
出版者: BIOMED CENTRAL LTD
出版地: LONDON
英文摘要: Background: The factors that contribute to and maintain hybrid zones between distinct species are highly variable, depending on hybrid origins, frequencies and fitness. In this study, we aimed to examine genetic origins, compositions and possible maintenance of Populus x jrtyschensis, an assumed natural hybrid between two distantly related species. This hybrid poplar occurs mainly on the floodplains along the river valleys between the overlapping distributions of the two putative parents. Results: We collected 566 individuals from 45 typical populations of P. x jrtyschensis, P. nigra and P. laurifolia. We genotyped them based on the sequence variations of one maternally inherited chloroplast DNA (cpDNA) fragment and genetic polymorphisms at 20 SSR loci. We further sequenced eight nuclear genes for 168 individuals from 31 populations. Two groups of cpDNA haplotypes characteristic of P. nigra and P. laurifolia respectively were both recovered for P. x jrtyschensis. Genetic structures and coalescent tests of two sets of nuclear population genetic data suggested that P. x jrtyschensis originated from hybridizations between the two assumed parental species. All examined populations of P. x jrtyschensis comprise mainly F-1 hybrids from interspecific hybridizations between P. nigra and P. laurifolia. In the habitats of P. x jrtyschensis, there are lower concentrations of soil nitrogen than in the habitats occupied by the other two species. Conclusions: Our extensive examination of the genetic composition of P. x jrtyschensis suggested that it is typical of F-1-dominated hybrid zones. This finding plus the low concentration of soil nitrogen in the floodplain soils support the F-1-dominated bounded hybrid superiority hypothesis of hybrid zone maintenance for this particular hybrid poplar.
关键词: Hybrid origin ; First-generation hybrids ; Hybrid superiority ; Populus x jrtyschensis
作者部门: [Jiang, Dechun ; Feng, Jianju ; Dong, Miao ; Wu, Guili ; Mao, Kangshan ; Liu, Jianquan] Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China ; [Feng, Jianju] Tarimu Univ, Coll Plant Sci, Xinjiang Prod & Construct Corps Key Lab Protect &, Alar, Xinjiang, Peoples R China
通讯作者: Liu, JQ (reprint author), Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China.
学科分类: Plant Sciences
文章类型: Article
所属项目编号: National High Technology Research and Development Program of China (863 Program) [2013AA100605] ; National Key Project for Basic Research [2012CB114504] ; National Natural Science Foundation of China [31260051] ; international collaboration '111' collaboration project
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划) ; 国家高技术研究发展计划(863计划)
项目资助者: NSFC ; MOST
语种: 英语
DOI: 10.1186/s12870-016-0776-6
ISSN号: 1471-2229
WOS记录号: WOS:000374285000001
PM记录号: 27091174
BIOSIS记录号: BCI:BCI201600431040
IR记录号: WOS:000374285000001
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/182000
Appears in Collections:生命科学学院_期刊论文

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Recommended Citation:
Jiang, DC,Feng, JJ,Dong, M,et al. Genetic origin and composition of a natural hybrid poplar Populus x jrtyschensis from two distantly related species[J]. BMC PLANT BIOLOGY,2016,16.
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