黑龙江不同产量类型水稻品种穗部性状的比较研究

以黑龙江省三积温带主栽水稻品种为材料,采用随机区组设计,比较了不同产量类型的产量构成因素以及穗部性状的差异。结果表明:黑龙江三积温带水稻多数为中产或中低产品种,高产品种较少。高产类型的产量构成特征为穗粒数和结实率较高,穗数和千粒重表现中等。一次枝梗数呈低产类型高产类型中产类型中低产类型的趋势,高产和低产类型一次枝梗数显著或极显著高于中产类型,各类型一次枝梗结实率均高于90%,一次枝梗的千粒重均在27 g左右。高产类型的二次枝梗数、二次枝梗粒数、千粒重、二次粒率都极显著高于其他类型。

Comparative Study of the Rice Varieties in Different Yield Types on Panicle Traits in Heilongjiang Province

Adopted the method of random block design,the differences of the yield components and panicle traits in different yield types were studied by using the main rice varieties grown in the third accumulated temperature zone of Heilongjiang province. The results showed that most varieties of the rice in the third accumulated temperature zone of Heilongjiang province were the middle yield varieties or the middle-low yield varieties, the high yield varieties were less. The yield components characteristics of high yield type were that grain number per panicle and seed setting rate were higher, spike number and 1000-grain weight showed medium. The number of primary branches presented the trend as follows： low yield type〉high yield type〉middle yield type〉middle-low type. The primary branch number of high and low yield type was significantly or very significantly higher than the middle yield type. The seed setting rate of primary branches of various types was all higher than 90%, the 1000-grain weight was all about 27 g. The number of secondary branches, the grains per secondary branches, 1000-grain weight and the secondary branch grain rate of high yield type were all significantly higher than other types.