优良食味粳稻新品种南粳9108产量及其构成因素的通径分析

为研究优良食味粳稻新品种南粳9108高产群体特征,以及大面积推广应用提供依据,对南粳9108产量及其构成因素进行了分析。结果表明:南粳9108从中产到高产主要通过每穗总粒数的增加实现,从高产到超高产主要通过有效穗和千粒重的增加实现。相关分析表明,南粳9108产量与每穗总粒数和千粒重呈显著正相关,与有效穗数和结实率呈不显著正相关。通径分析显示,每穗总粒数对产量的直接作用最大,其次是有效穗数,每穗总粒数通过有效穗数对产量的负效应最大,生产上应协调好每穗总粒数和有效穗数的关系;结实率和千粒重对产量的影响虽然没有每穗总粒数和有效穗数明显,但各因素之间仍存在相互协调作用。

Path Analysis of Yield and Yield Components of Good Eating-quality Japonica Rice Variety Nanjing 9108

In order to study the high-yielding population characteristics of good eating-quality japonica rice new variety Nan-jing 9108,and provide references for the large-area extension and application of this variety,we analyzed the relations between the yield and yield components of this variety. The results indicated that the yield increase of Nanjing 9108 from middle yield to high yield was realized mainly by the increase in the number of total grains per panicle,and that from high yield to super-high yield was realized mainly through the increase in the number of effective panicles and 1000-grain weight. Correlation analysis showed that the yield of Nanjing 9108 was significantly positively correlated with the number of total grains per panicle and 1000-grain weight,and was un-significantly positively correlated with the number of effective panicles and seed setting rate. Path analysis showed that：the number of total grains per panicle had the greatest direct action on the yield,followed by the number of effective panicles;the num-ber of total grains per panicle had the largest indirect negative effect on the yield through the number of effective panicles. So we should coordinate the relationship between the number of total grains per panicle and the number of effective panicles in rice produc-tion. Seed setting rate and 1000-grain weight had a certain impact on the yield,but there was still coordinated action among vari-ous yield components.