不同年代小麦产量性状与农艺性状的相关性比较

Correlation Contrast Between Yield and Agronomic Traits of Wheat

为研究不同年代小麦的主要农艺性状与产量性状之间的相关性,对4个不同年代78个小麦品种的主要性状进行调查分析,得出如下结论:随着年代的推进,小麦株高的降低趋势明显并趋于稳定,旗叶长呈缓慢下降趋势,旗叶宽、旗叶面积先增长后趋于稳定。在各年代中,株高与穗粒数、千粒质量和结实小穗数呈不显著正相关,与不孕小穗数呈不显著负相关。旗叶宽和旗叶面积与穗粒数、千粒质量和结实小穗数呈一定的负相关性,并与不孕小穗数呈一定的正相关性。因此,适当降低株高,增加旗叶宽和旗叶面积,对提高小麦产量有一定的推进作用。穗粒数和不孕小穗数的变异系数均较高,有较大的选择空间。

To study correlations of wheat yield and agronomic traits,it had investigated the main traits of 78 wheat varieties in 4 different ages.Results indicated that,with time passing,plant heights showed trends of firstly reduced and then kept stable,flag leaf lengths decreased slowly,flag leaf widths and areas were firstly increased and then kept stable.Among the 4 ages,plant heights exhibited non-significant negative correlation with kernel number per ear,thousand grains weight and maturing spikelet number,and non-significant positive correlation with infertility spikelet number.Certain positive correlation existed in flag leaf length and area with the yield traits.Therefore,reduced plant height and increased flag leaf width and area is favorable to increase wheat production.High variable coefficients existed in ear grain number and infertility spikelet number,and more choice value was provided for later breeding work.