湖北省近年审定中稻品种产量及其相关性状分析

Analysis on the Yield and Its Relative Characters of Certified Medium Rice Varieties in Hubei Province

对湖北省2003～2012年审定中稻品种的产量及其相关性状进行相关及通径分析。结果表明,对产量影响的相对重要性依次为每穗总粒数、千粒重、结实率和有效穗数,它们对产量的直接通径系数分别为1.007 3、0.871 4、0.642 5和0.632 3。在此基础上提出湖北省中稻育种应在保证合理有效穗数的基础上适当增加每穗总粒数及千粒重,着重提高结实率,这是中稻产量突破的主攻方向。

The yield and its relative characters of medium rice varieties certified in Hubei during 2003 to 2012 were analyzed using the method of correlation and path analysis.The results indicated that the relative importance of traits to yield were as follows: glume number per panicle > 1 000 grains weight > the ratio of seed setting > effective panicle number,the direct path coefficients of them to yield were 1.007 3,0.871 4,0.642 5 and 0.632 3 respectively.So,increasing the glume grain number per panicle and 1 000 grains weight based on proper panicle number,especially increasing seed setting rate should be major directions toward super high-yield.