小麦生育期性状与产量性状的相关与通径分析

Correlation and Path Analysis of Yield and Developmental Stages in Wheat

通过对来自全国各地的 4 8个小麦品种生育期性状与产量性状的相关与通径分析 ,结果表明各生育期性状与千粒重、穗粒重等主要产量构成因素和产量基本呈显著正相关 ,与退化小穗数极显著负相关。全生育期天数对产量的直接影响最大(p4 y=0 .5 6 71) ,达极显著水平 :“出苗——抽穗”天数对产量的直接影响负向显著 (p1 y=- 0 .2 5 5 4 ) ,但经全生育期天数对产量有一个较大的正向间接作用 (p1→ 4→ y=0 .4 4 99) ;“抽穗——开花”天数以及“开花——成熟”

Forty-eight wheat varieties were used to explore the relations between yield and developmental stages by means of correlation and path analysis methods. Results indicated that yield was significantly correlated with days from heading to flowering, days from flowering to maturity and whole growing duration. Whole growing duration had strong direct effects on yield( p 4y =0.5671),and days from emergence to heading affected yield negatively and closely( p 1y =-0.2554),but indirectly through days from seedling to maturity( p 1→4→y =0.4499).Days from heading to blessem and blossom to maturity didn't have significat effects on yield.