文献类型： 外文期刊
作者： Feng, Chao 1 ; Wang, Jing 3 ; Harris, A. J. 1 ; Folta, Kevin M. 5 ; Zhao, Mizhen 3 ; Kang, Ming 1 ;
作者机构： 1.Chinese Acad Sci, Key Lab Plant Resources Conservat & Sustainable U, South China Bot Garden, Guangzhou, Peoples R China
2.Chinese Acad Sci, Ctr Conservat Biol, Core Bot Gardens, Guangzhou, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Pomol, Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing, Peoples R China
4.Oberlin Coll, Dept Biol, Oberlin, OH 44074 USA
5.Univ Florida, Hort Sci Dept, Gainesville, FL USA
关键词： Fragaria; chromosome-level genome; diploid progenitors; gene tree discordance; ILS and hybridization; sppIDer
期刊名称：MOLECULAR BIOLOGY AND EVOLUTION （ 影响因子：11.062； 五年影响因子：13.401 ）
ISSN： 0737-4038
年卷期： 2021 年 38 卷 2 期
页码：
收录情况： SCI
摘要： The commercial strawberry, Fragaria x ananassa, is a recent allo-octoploid that is cultivated worldwide. However, other than Fragaria vesca, which is universally accepted one of its diploid ancestors, its other early diploid progenitors remain unclear. Here, we performed comparative analyses of the genomes of five diploid strawberries, F. iinumae, F. vesca, F. nilgerrensis, F. nubicola, and F. viridis, of which the latter three are newly sequenced. We found that the genomes of these species share highly conserved gene content and gene order. Using an alignment-based approach, we show that F. iinumae and F. vesca are the diploid progenitors to the octoploid F. x ananassa, whereas the other three diploids that we analyzed in this study are not parental species. We generated a fully resolved, dated phylogeny of Fragaria, and determined that the genus arose similar to 6.37 Ma. Our results effectively resolve conflicting hypotheses regarding the putative diploid progenitors of the cultivated strawberry, establish a reliable backbone phylogeny for the genus, and provide genetic resources for molecular breeding.
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