水稻亚种特性与经济性状相关性的研究

The Relationships on Subspecies Characteristics and Economic Characters in Rice

采用程氏指数法研究的结果表明:水稻亚种特性与经济性状有一定相关性,其中与结实率呈极显著正相关,与株高、穗数、穗重呈显著相关;亚种特性特别是与一次枝梗的各项性状如个数、千粒重、粒数、结实率,二次枝梗的二次粒率有密切相关性。亚种特性与穗颈大维管束数、小维管束数均呈极显著相关。

The Cheng＇s index Classification Method was used to study rice characteristics. The results showed as follows： There was some relation on characteristics of subspecies and economical traits. Subspecies Characteristics correlated with seed setting rate, plant height, panicle number per plant and panicle weight. Especially, there was close relation on Subspecies Characteristics, Primary rachis branches traits （number per panicle, 1000-grain weight ,grain number ,seed setting rate ） and the secondary rachis branches grains rate . Subspecies Characteristics correlated with the large vascular bundles number of panicle neck and the small vascular bundles number of panicle neck.