优质粳型不育系爱知香A的选育与利用

Breeding and Utilization of Fine Quality Japonica CMS Line Aizhixiang A in Rice

爱知香A是用日本优质抗病粳稻品种爱知香与BT型不育系六千辛A测交并连续回交转育而成的早熟中粳不育系 ,具有米质优、抗病性强、农艺性状优良、花粉败育彻底、配合力好等特点 ,2 0 0 2年 8月通过江苏省技术鉴定 ,2 0 0 3年 1月通过江苏省品种审定。利用其配制的杂交粳稻新组合香优 18(爱知香A MR18)表现优质、高产、抗病 ,于 2 0 0 3年 1月通过江苏省品种审定。

Aizhixiang A, developed by testcrossing Aizhixiang (a Japanese japonica rice variety with fine quality and good disease resistance) to Liuqianxin A (a BT-type japonica CMS line) and backcrossing successively with Aizhixiang, is an early-maturing medium japonica CMS line. It is characteristic of fine grain quality, strong disease resistance, desirable agronomic characters, complete male sterility and good combining ability. It was technically identified in August, 2002 and certified in January, 2003 by Jiangsu Crop Variety Release Committee. Crossing it to a new restorer line MR18, the new japonica hybrid rice combination Xiangyou 18 (Aizhixiang A/MR18) has been developed. Certified by Jiangsu Crop Variety Release Committee in January 2003, Xiangyou 18 shows a good grain quality, a high-yielding ability and a good disease resistance in various trials and experimental productions.