早熟高产优质抗条纹叶枯病水稻新品种垦育20号的选育及应用

Selective Breeding and Application of A New Rice Varity Kenyu No.20 with Early Maturity,High Yield,Good Quality and Resistance to Rice Stripe

垦育20号是利用具有日本、意大利和河北省育成品种丰富遗传基础的＂品一＂作母本,与早熟、丰产、优质父本＂冀粳13号＂杂交,后代通过连年自交定向选择育成的。2003~2004年河北省区域试验,平均产量9 232.5 kg/hm2,较对照品种垦育12号增产6.41%,达显著水平;2004年河北省生产试验,平均产量9 176.6 kg/hm2,较对照品种垦育12号增产9.42%。该品种具有早熟、高产、优质和多抗特点,综合表现优异,最突出表现为抗水稻条纹叶枯病。

Through the hybridization of Pinyi （female parent） which had the rich genetic bases of rice varieties from Japan, Italy and Hebei Province with Jijing No. 13 （male parent） which had the valuable characters of early maturity, high yield and good quality, Kenyu No. 20 was obtained after progeny auto-copulation and directive selection successively with high and stable yield, good quality, multi-resistance, excellent comprehensive performance and high resistance to rice stripe. The yield in regional test and production test in Hebei Province from 2003 to 2004 were 9 232.5 kg/hm2 and 9 176. 6 kg/hm2, respectively, which were increased by 6.41% and 9.42% than Kenyu No. 12, respectively.