【摘要】 本试验对前人用不同方法筛选出的28份耐低磷种质资源在同一条件下进行苗期耐低磷能力研究,试验结果表明,35×10-6磷水平下可有效鉴定苗期各水稻基因型的耐低磷能力,以苗期相对根干重作为水稻耐低磷能力的鉴定指标即可。以相对根干重为筛选指标获得苗期耐低磷种质共14份,分别为武糯1号、盐粳2号、双城糯、麻酒谷、软稻子、大红芒、大白芒、有芒小红板稻、麻谷子、普粘7号、嘉农育257、农林12、意大利4号、滇屯502,这些品种可作为磷高效遗传研究或育种利用的重要种质资源。更多还原

【Abstract】 28 different rice varieties of tolerance to low-phosphorus,were identified and evaluated through different methods and different people,which were used as the materials for tolerance to low-phosphorus stress on the same condition at seedling stage. The results showed that the optimum P concentration for screening rice germplasm tolerant to low phosphorus stress was 35 × 10- 6at seeding stage,and the relative root dry weight could be used as the index for evaluating the ability of rice tolerant to low phosphorus. According to this index,14 varieties,they are Wunuo 1,Yanjing 2,Shuangchengnuo,Majiugu,Ruandaozi,Dahongmang,Dabaimang,Youmangxiaohongbandao,Maguzi,Puzhan 7,Jianongyu257,Nonglin12,Yidali4,Diantun502,can be used as resources of genetic research or breeding for phosphorus efficient utilization.更多还原