互作型弱感光性籼稻不育系广星A的选育与利用

Breeding and Application of Indica CMS Line Guangxing A with Interactive Weak Photosensitivity

广星A是广东省农业科学院水稻研究所以自育的保持系中间材料19B与感温性保持系天丰B杂交制保,再与高异交率的优ⅠA杂交和多代回交转育而成的互作型弱感光性籼稻不育系。该不育系株叶形态好,穗大粒多,耐肥抗倒,抗病性好,不育性稳定,配合力强,异交结实率高,繁制产量高,于2017年通过广东省种子管理总站鉴定。广星A所配的杂交组合广星优289、广星优8689、广星优青占和广星优1380先后通过省级或国家审定。

Guangxing A is an indica cytoplasmic male sterile(CMS) line in rice with the characteristic of interactive weak photosensitivity developed by the Rice Research Institute of Guangdong Academy of Agricultural Sciences. It was derived from the cross between the intermediate maintainer line 19B and Tianfeng B, a thermo-sensitive maintainer line, and then the testcross with You Ⅰ A with high outcrossing rate and subsequent successive backcrosses. Guangxing A shows good plant type, large panicle with many grains, lodging resistance with good fertilizer tolerance, strong disease resistance, stable male sterility, high combining ability and high outcrossing rate and yield in multiplication and hybrid seed production. It was technically identified by Guangdong Seed Management Station in 2017. The hybrid combinations derived from Guangxing A including Guangxingyou 289, Guangxingyou 8689, Guangxingyou Qingzhan and Guangxingyou 1380 have been registered and released for commercial production at the provincial or national level successively.