水稻氮高效种质资源的筛选

Screening of Rice Germplasm Resources with High Utilization Ratio of Nitrogen Fertilizer

选取100份不同质源的水稻材料,通过施氮与不施氮对比试验,以有效穗、穗长、穗粒数、千粒重、株高及始穗期为指标进行灰色关联分析。结果表明,参试材料可分为4类,其中第Ⅳ类10份材料灰色关联度(Gij)超过了8,为氮高效材料。仅以有效穗、实粒数及千粒重3个水稻产量构成因子进行分析,85、78、81、77、64和97号6份材料最优,可以作为氮高效特性转育的亲本材料使用。

100 rice materials were selected for contrast test, and the traits of the effective panicle, the panicle length, the filled grain number per panicle and 1000-grain weight, et al. were studied by grey relafiorud analysis. The results showed that 100 materials were divided into4 classes, of which the grey correlation degree（Gv） of 10 materials in the fourth class were more than 8, which could used as the materials with high utilization ratio of nitrogen fertilizer. The effective panicle, the filled grain number per panicle and 1000-grain weight of No. 85, 78, 81,77, 64 and 97 were analyzed as the yield component factors, which were superior to the others and could be used as the paint material in high efficient utilization of nitrogen fertilizer.