云南粳稻育成品种的产量与各农艺性状之间的相关分析

Correlative Analysis between the Yield and Some Agronomic Traits of the Japonica Rice Varieties Bred in Yunnan

对云南省中部、中北部八十年代育成品种或生产上大面积推广品种的稻谷产量与各农艺性状之间进行了相关分析．结果表明：稻谷产量与全生育期、有效穗、穗实粒数、千粒重、株型、草重、谷重、生物产量、稻米品质呈显著至极显著的正相关，与剑叶角度呈显著的负相关．此外还观察了４个云南地方品种和７个日本品种的产量与农艺性状，日本品种矮杆、多穗、株型较好，云南地方品种高杆、大穗、株型较差，两类品种叶穗瘟都较重，不能直接用于生产．

Correlative analysis was carried out between yield and agronomic traits of Japonica rice varietied bred in central and north central Yunnan during 1980' and being growing broadly.Results indicated that it showed significant and very significant positive correlation between,yield and growing period,productive ear amount,grain quantity per ear,thousand grain weight,plant canopy shape,straw weight,ear weight,total dry matter,quality;negative correlation between yield and flag leaf angle.Meanwhile,four Yunnan local varieties and seven Japanese varieties were compared.Japanese varieties were with shorter stem,more ear,better plant canopy shape and Yunnan varieties with higher stem,bigger ear and poor plant canopy shape.Two kinds of varieties showed serious leaf and neck blast.Farmers,therefore,can not grow both of them,directly.