优质两系杂稻新组合两优211的选育

Breeding of Liangyou 211, a Two-line System Hybrid Rice with High Quality

利用自育的优质水稻两用核不育系 2 136S与恢复系多系 1号配组 ,育成了优质两系杂稻新组合两优 2 11。经两年贵州省杂稻区试鉴定 ,两优 2 11平均每 667m2 产量 5 11.5 kg,比对照平均增产 3.2 %。一年生产试验鉴定 ,平均每 667m2产量 4 91.1kg,比对照平均增产 14.9%。稻瘟病接种和自然鉴定结果表明 ,两优 2 11对稻瘟病有较好的抗性。稻米理化指标测试和食味鉴评结果米质优良。两优 2 11于 2 0 0 0年通过贵州省农作物品种审定委员会审定 ,是目前中高海拔地区调整种植业产业结构 ,发展优质米及晚 3系列的替代组合之一 。

Liangyou 211, a two line system hybrid rice with high quality, was developed as a new hybrid rice combination. Its female parent is Indica dual purpose genic male sterile line 2136S and male parent is restorer, Duoxi 1. The average yield of Liangyou 211 is 7672.5kg/ha with increasing 3.2% than CK combination for two year regional tests and 7366.5kg/ha with increasing 14.4% than CK combination for one year productive tests in Guizhou. Liangyou 211 possesses characteristics of high yield, good quality, better blast resistance and cold tolerance. It has been released by Guizhou Committee of Crop Variety Examination in 2000. The new combination is suitable for middle high elevation regions and there is a good prospect of utilization for developing high quality rice production.