3个杂交稻品种油后直播栽培产量性状相关性研究

摘要

Objective]Correlation of three hybrid rice varieties (F You 498,Chuanyou 6203,Jingyou 127)yield traits after rapeseed direct so-wing culture was studied.[ Method] After rapeseed direct sowing culture in demonstration field, yield traits were studied by multipoint sam-pling, then the correlation analysis, regression analysis and path analysis were carried out.[Result]The results showed that the yield of F You 498 with filled grains had very significant positive correlation.The yield of Chuanyou 6203 and Jingyou 127 had very significant positive corre-lation with effective panicles.Path analysis indicated the order of contribution size for yield was panicle weight, grains per panicle, effective panicles number, seed-setting rate, 1 000-grain weight, filled grains per panicle(F You 498);effective panicles number, 1 000-grain weight, filled grains per panicle, grains per panicle, seed-setting rate, panicle weight(Chuanyou 6203); panicle weight, effective panicles number, seed-setting rate, grains per panicle, 1 000-grain weight, filled grains per panicle(Jingyou 127).[Conclusion] In actual production, if we want to obtain high yield,we should make the yield traits coordination.%[目的]研究F优498、川优6203和旌优127这3个杂交稻品种油后直播栽培产量性状的相关性。[方法]在示范田进行油后直播栽培示范，多点取样统计有效穗数、穗着粒数、穗实粒数、结实率、千粒重、单穗重和产量，并进行相关分析、回归分析和通径分析。[结果] F优498产量和穗实粒数呈极显著正相关，川优6203和旌优127产量和有效穗数之间呈极显著正相关。通径分析表明，各产量性状对产量的直接作用大小依次为单穗重、穗着粒数、有效穗数、结实率、千粒重、穗实粒数（ F优498）；有效穗数、千粒重、穗实粒数、穗着粒数、结实率、单穗重（川优6203）；单穗重、有效穗数、结实率、穗着粒数、千粒重、穗实粒数（旌优127）。[结论]在实际生产中，要使各产量性状协调，以获得高产。