文献类型：期刊文献

英文题名：Genetic analysis of admixture and hybrid patterns of Populus hopeiensis and P. tomentosa

作者：Wang, Dongsheng[1,3] Wang, Zhaoshan[1,2] Kang, Xiangyang[4] Zhang, Jianguo[1,2]

第一作者：Wang, Dongsheng

通信作者：Wang, ZS[1];Zhang, JG[1];Wang, ZS[2];Zhang, JG[2]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Key Lab Silviculture State Forestry Adm, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Collaborat Innovat Ctr Sustainable Forestry South, Nanjing 210037, Jiangsu, Peoples R China;[3]Hebei Normal Univ Sci & Technol, Coll Hort Sci & Technol, Qinhuangdao 066004, Peoples R China;[4]Beijing Forestry Univ, Coll Biol Sci & Biotechnol, Beijing 100091, Peoples R China

年份：2019

卷号：9

期号：1

外文期刊名：SCIENTIFIC REPORTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000461419200002)】；

基金：We sincerely thank Dr. Pingdong Zhang from the Beijing Forestry University, as well as Dr. Yanfei Zeng and Dr. Aiguo Duan for collecting the specimens and extracting DNA. We also thank Dr. Wenting Wang from the Northwest University for Nationalities for her advice on data analysis. This work was supported by the Fundamental Research Funds of Chinese Academy of Forestry [No. CAFYBB2017ZX001-1], and the grants of the National Natural Science Foundation of China [No. 31470665].

语种：英文

摘要：Hybridization and introgression have resulted in reticulate evolution within the genus Populus. Consequently, the origin and evolutionary history of some hybrids has become blurred. P. hopeiensis and P. tomentosa are endemic to China, and there is still controversy about their origin. We employ phylogeny, Bayesian estimation of admixture, and approximate Bayesian computation to investigate their origin with 10 nuclear DNA and 6 cpDNA regions. The combined evidences firmly support the hypothesis that they are hybrids and dominated by F(1)s. P. hopeiensis was generated via hybridization between the paternal species P. alba and maternal species P. davidiana. Surprisingly, P. tomentosa was divided into two genetic types with different maternal parents. P. adenopoda hybridized with P. alba directly to generate the first genetic type (mb1) and hybridized with P. davidiana followed by P. alba to generate the second (mb2). In both genetic types, P. alba acted as the male parent. The maternal parent was P. adenopoda and P. davidiana for mb1 and mb2, respectively. Hybridization not only generated these hybrids but also resulted in a unidirectional gene flow from P. davidiana to P. adenopoda. The Populus species have maintained a delicate balance between their genetic integrity and gene exchange.