河南省近几年审定的弱春性小麦新品种产量表现

目的]探索弱春性小麦品种产量及其构成三要素的关系，为今后弱春性小麦新品种选育提供参考。方法]对2005～2012年河南省审定的32个弱春性小麦品种的产量及主要农艺性状进行相关分析和通径分析。结果]随着年份增加小麦平均产量呈递增趋势，而产量构成中仅仅千粒重呈上升趋势。产量与主要农艺性状的相关程度为：生育期（0．67362）〉穗数（0．43068）〉千粒重（0．20986）〉株高（-0．41054）〉穗粒数（-0．56406）；3个产量构成因素对产量的直接通径系数大小顺序为穗数（1．2466）〉千粒重（1．1301）〉穗粒数（-0．0342）。结论]根据分析结果和河南省目前生态条件及种植条件，弱春性小麦高产育种应注重中多穗型品种，兼顾穗重。

Yield Performance of Weak-spring Wheat Varieties Approved in Recent Years in Henan Province

Objective ] The aim was to discuss the relationship between yield of weak-spring wheat varieties and three yield components, and provide a reference for their breeding in future. Method] The yield and main agronomic characters of 32 approved weak-spring wheat varieties in Henan province were analyzed using correlation and path analysis. Result] The average wheat yield followed an increasing trend with the year increasing, but among the three yeld components, only 1000-grain weight was on the rise. The order of the related degree of yield and main agronomic characters was： growth period （0. 673 62） 〉 Spikes （0. 430 68） 〉 1000-grain weight （0. 209 86） 〉 plant height （ -0.410 54） 〉 grains per spike （ -0. 564 06） ; The order of the direct path coefficient of three yield components on yield was： spike number （ 1. 246 6） 〉 1 000-grain weight （ 1. 130 1 ） 〉 grain number per spike （ -0. 034 2）. Conclusion] Based on the analysis and current ecological conditions and growing conditions in Henan Province, breeding new wheat varieties should focus on multi-spike cuhivars, spike weight coordination also should be paid attention at the same time.