论文部分内容阅读
杂交水稻的生产应用为我国粮食生产作出了巨大贡献 ,其种植面积占水稻年播种面积的 5 0 %以上。本文采用九种不育胞质类型划分法 ,对我国 1996～ 1998年杂交水稻主要品种的胞质类型进行了分析。生产上应用的三系杂交稻按其胞质类型所配组合的播种面积比重排序依次为野败型、冈·D型、印尼水田谷型、矮败型、两系、红莲型、K型和 BT型 ;野败型的面积比重在逐年下降 ,冈· D型、印尼水田谷型和矮败型等的面积比重在逐年增加。两系杂交稻 10余个组合通过了省级审定 ,培矮 6 4S的广泛应用展示了两系杂交稻超三系的广阔前景。我国已育成超级杂交稻苗头组合 ,个别组合在部分连片示范点 (6 .7hm2 )达到了日产稻谷 10 0 kg/ hm2的超级稻指标
The production and application of hybrid rice has made a great contribution to the grain production in our country. Its planting area accounts for more than 50% of the sown area of rice. In this paper, nine types of sterile cytoplasm were used to analyze the cytoplasmic types of the main hybrid rice varieties from 1996 to 1998 in our country. The three-line hybrid rice used in production ranked the proportion of the sown area according to their combination of cytoplasmic types as wild type, Gang D type, paddy valley type, dwarf type, two series, honglian type, K type And BT type; the proportion of wild-type area decreased year by year, Gang · D type, paddy valley type and dwarf type, such as the proportion of Indonesia is increasing year by year. Two-line hybrid rice more than 10 combinations passed the provincial-level validation, Pei-breed 6 4S wide application of the two-line hybrid rice super three lines of broad prospects. China has bred super hybrid rice seedlings combinations, individual combinations in some contiguous demonstration sites (6. 7hm2) reached the daily output of rice 100 kg / hm2 super rice indicators