宁夏杂草稻农艺性状的鉴定评价

Analysis of Agronomic Characteristics of Ningxia Weedy Rice

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。

Using 105 weedy rices that collected from nine counties （districts） of Ningxia as materials, we analyzed the main phenotypic characteristics of weedy rice through identification and evaluation of their leaf morphological traits, panicle trait, grain traits and others. The result showed that panicle exertion, panicles per plant and spikelets per panicle were mostly varied with a coefficient of variation of above 20 %. Plant height, panicle length, setting rate, leaf length, leaf width were following varied with a coefficient of variation of about 10%. The variations of grain traits were smaller that the coefficient of variation was about 5 %. Growth period showed smallest variation that the variation coefficient was only 1.91%. Most quality traits of weed rice were consistent with the cultivars. It was concluded that agronomic characteristics of Ningxia weedy rice had poor variations with few mutation types. Most agronomic traits of weedy rice were similar to those of cultivated rice. This similarity is conducive to the survival and reproduction of weedy rice.