新麦草种子产量因子与产量的通径分析

Path Coefficient Analysis between on Yield Components and Yield in Psathyrostaehys juncea Nevski

采用多因素正交试验设计 ,通过大样本相关、通径和逐步回归分析后表明 ,新麦草 5个种子产量因子对种子产量的直接贡献大小排序为 :生殖枝数 /m2 >单粒种子重 >小花数 /小穗 >小穗数 /生殖枝 >种子粒数 /小穗 ;提高生殖枝数 /m2 可最有效提高新麦草的种子产量 ,其次是提高每小穗小花数和每小穗种子粒数 .

Based on multi-factor orthogonal des ig ned field experiment in Psathyrostaehys juncea Nevski. Analysis approaches o f correlation, regression and path coefficient were employed to test data of fie ld trials. The result indicated that effect of yield components on seed yield wa s in order of contribution as following, shoot/m2>seed weight>florets/spikel et> spikelets/shoot >seed numbers/spikelet; Increasing shoot/m2 is the most productive on the seed yield in the components, then is the seed weight and flor ets/spikelet.