Genetic analysis of photoperiod sensitivity associated with difference in ecotype in common buckwheat
Genetic analysis of photoperiod sensitivity associated with difference in ecotype in common buckwheat
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DOI：
10.1270/jsbbs.19118
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发表时间：
2020-01-01
期刊：
影响因子：
2.4
通讯作者：
Ohsawa, Ryo
中科院分区：
文献类型：
--
作者：
Hara, Takashi;Shima, Taeko;Ohsawa, Ryo
荞麦生态型育种是选育适应性强的荞麦品种和推广栽培的关键技术。然而，光周期敏感性和生态型之间的关系的细节仍然不清楚。在这里，我们评估了来自日本不同地区的15个地方品种的光周期敏感性，并分析了光周期敏感性的数量性状基因座（QTL）使用两个F-2分离群体来自自交亲和系（'Kyukei SC 2'或'荞麦Norio PL 1'，早期开花）和异花植物（中间或后期开花）之间的杂交。我们阐明：（1）光周期敏感性与生态型差异密切相关;（2）光周期敏感性受不同生态型群体中常见的几个QTL控制;（3）GIGANTEA和EARLY FLOWERING 3的直系同源物将是有用的标记在未来详细阐明荞麦的光周期敏感性机制。本研究为荞麦基因组辅助育种的地方适应性和生态型育种奠定了基础。
Ecotype breeding is a key technology in common buckwheat (Fagopyrum esculentum Moench) for the breeding of highly adaptive cultivars and their introduction to other cultivation areas. However, the details of the relationship between photoperiod sensitivity and ecotype remain unclear. Here, we evaluated photoperiod sensitivity in 15 landraces from different parts of Japan, and analyzed quantitative trait loci (QTLs) for photo-period sensitivity using two F-2 segregating populations derived from the crosses between self-compatible lines ('Kyukei SC2' or 'Buckwheat Norio PL1', early days-to-flowering) and allogamous plants (intermediate or late days-to-flowering). We clarified that (1) photoperiod sensitivity and differences in ecotype are closely related; (2) photoperiod sensitivity is controlled by several QTLs common among population of different eco-types; and (3) orthologues of GIGANTEA and EARLY FLOWERING 3 will be useful markers in future detailed elucidation of the photoperiod sensitivity mechanism in common buckwheat. This study provides the basis for genomics-assisted breeding for local adaptation and ecotype breeding in common buckwheat.