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以收集于宁夏9个县(区)的105份杂草稻为试验材料,鉴定评价其茎叶形态性状、穗部性状、子粒性状等农艺性状,分析宁夏杂草稻的主要特性。结果表明,宁夏杂草稻的穗抽出度、有效穗数、每穗粒数的变异较大,变异系数在20%以上;株高、穗长、结实率、剑叶长、剑叶宽次之,变异系数在10%左右;子粒性状变异较小,变异系数在5%左右;生育期变异最小,变异系数仅为1.91%;茎叶和子粒的质量性状的表型变异与栽培品种基本一致。总之,宁夏杂草稻农艺性状的表型变异较小,变异类型较单一,大多数农艺性状表现与当地栽培稻相近或相似,这种相似性有利于杂草稻的生存和繁衍。
A total of 105 weedy rice collected in 9 counties of Ningxia were used as experimental materials to identify and evaluate agronomic traits such as morphological traits of stems and leaves, ear traits and grain traits. The main characteristics of weedy rice in Ningxia were analyzed. The results showed that the variation of spike extraction, effective panicle number and grain number per panicle of weedy rice in Ningxia was large with the coefficient of variation above 20%. The plant height, spike length, seed setting rate, flag leaf length and flag leaf width , The coefficient of variation was about 10%, the variance of the grain traits was small, the coefficient of variation was about 5%, the variation at the growth stage was the smallest, the coefficient of variation was only 1.91%, and the phenotypic variation of the quality traits of stem, leaf and grain were basically the same as the cultivars. In summary, the agronomic traits of weedy rice in Ningxia showed a small phenotypic variation with a single type of variation. Most of the agronomic traits were similar or similar to that of the local cultivated rice. This similarity is conducive to the survival and reproduction of weedy rice.