文献类型： 外文期刊
第一作者： Cheng, Cheng
作者： Cheng, Cheng;Fan, Yu;Zhang, Kaixuan;Jha, Rintu;Zhou, Meiliang;Cheng, Cheng;Yan, Mingli;Tang, Yu;Joshi, Dinesh C.;Janovska, Dagmar;Meglic, Vladimir
作者机构：
关键词： buckwheat; chloroplast genome; Fagopyrum esculentumssp; ancestrale; molecular markers; phylogenetics
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）
ISSN： 1664-462X
年卷期： 2020 年 11 卷
页码：
收录情况： SCI
摘要： Fagopyrum cymosumis considered as most probable wild ancestor of cultivated buckwheat. However, the evolutionary route fromF. cymosumtoF. esculentumremains to be deciphered. We hypothesized that a hybrid species exists in natural habitats between diploidF. cymosumandF. esculentum. The aim of this research was to determine the phylogenetic position ofF. esculentumssp.ancestraleand to provide new thoughts on buckwheat evolution. Different methodologies including evaluation of morphological traits, determination of secondary metabolites, fluorescencein situhybridization (FISH), comparative chloroplast genomics, and molecular markers were deployed to determine the phylogenetic relationship ofF. esculentumssp.ancestralewithF. cymosumandF. esculentum. The ambiguity observed in morphological pattern of genetic variation in three species revealed thatF.esculentumssp. ancestrale is closely related toF. cymosumandF. esculentum. Flavonoid analysis revealed thatF.esculentumssp.ancestraleis closely related toF. esculentum. Comparative chloroplast genome analysis further supported the close proximity ofF. esculentumssp.ancestralewithF. esculentum. Additionally, molecular marker analysis revealed thatF. esculentumssp.ancestraleexhibits co-dominance with the bands amplified byF. cymosumandF. esculentum. These finding provided supporting evidence in favor of the hypothesis thatF. esculentumssp.ancestraleis a hybrid species betweenF. cymosumtoF. esculentum, which was probably originated by spontaneous hybridization under natural conditions.
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