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利用从国外引进的优质香稻保持系IR58025B与国内优良保持系V20B、金23B等杂交和复交,并与V20A测交和逐代回交,育成了优良不育系湘丰70A,2005年通过湖南省品种审定。通过“与早熟恢复系配组杂交早稻组合、与中迟熟恢复系或早熟弱感光恢复系配组杂交晚稻组合”的配组策略,育成了湘丰优9号、湘丰优103、湘丰优974、湘丰优186、湘优616、湘优华占等10个组合12次通过国家或省级审定。介绍了湘丰70A及其所配部分代表性组合的主要特性以及育种体会。
Using the introduction of foreign high-quality rice IR58025B line with the domestic excellent maintainer line V20B, gold 23B and other hybrid and backcross, and V20A dating and back-generation back, bred into a good sterile line Xiangfeng 70A 2005 through Hunan Provincial varieties validation. Through the teaming strategy of “early hybrid rice combination with early maturity restorer line, late hybrid rice combination with late maturity restorer line or early hybrid weak light restorer line”, we successfully developed Xiangfengyou 9, Xiangfengyou 103, Xiang Feng You 974, Xiang Feng You 186, Xiang You 616, Xiang Youhua accounted for 10 combinations of 12 passed the national or provincial validation. The main characteristics of Xiangfeng 70A and some representative combinations of Xiangfeng 70A and its breeding experience were introduced.