早籼恢复系To463的选育及应用

Breeding and Application of Indica Early Restorer Line To463 in Rice

采用两个亲源不同的早籼恢复系To974与R4 0 2杂交 ,育成优良早籼恢复系To4 6 3。该恢复系综合了双亲的优良特性 ,具有米质较优、恢复力强、配合力高、花粉量大等优点。利用该恢复系选配的组合具有产量高、米质优、适应性广、稳产性好、苗期较耐寒、后期耐热性好、灌浆成熟快等优良特性 ,其中威优 4 6 3、金优 4 6 3已通过广西区审定 ,新香优 4 6 3通过衡阳市审定 ,显示出较好的应用前景。

Crossing two different indica early cropping restorer lines To974 and R402, a new good quality restorer line To463 has been developed. Having combined the favourable characters of the two parents, it has the features of good grain quality, strong restoring ability, good combining ability, and heavy pollen load. The hybrids derived from it show high yielding ability, good grain quality, wide adaptability, good cold tolerance in seedling stage and good high temperature tolerance and fast grain filling in late growing stage. Among them, Weiyou 463 (V20A×To463) and Jinyou 463 (Jin 23A×To463) were certified and released to farmers' fields in Guangxi in 2001 and Xinxiangyou 463 (Xinxiang A×To463) in Hengyang, Hunan in 2000.