宁麦20丰产性、稳产性及产量构成因素分析

摘要

The yield potential, yield stability and yield components of wheat variety Ningmai 20 were analyzed according to the data from the regional tests and production tests of wheat varieties in Huainan region of Jiangsu province during 2009~2012.The results showed that Ningmai 20 had better yield potential and yield stability , and its yield level was mainly distributed in the range from 6000 to 7500 kg/hm 2 .Its average number of spikes per hectare , number of grains per spike and 1000 -grain weight were 4656000 spikes, 38.3 grains and 38.2 g, respectively.Correlation analysis showed that the grain yield was positively and signifi-cantly correlated with the number of spikes , but it had no significant correlation with the number of grains per spike and 1000-grain weight.Path analysis showed that the number of grains per spike had the greatest direct and positive effect on the grain yield , fol-lowed by the number of spikes , and 1000-grain weight had the least effect .%　　利用2009～2012年度江苏省淮南片小麦区域试验和生产试验资料，对宁麦20的丰产性、稳产性以及产量构成因素进行了分析。宁麦20具有较好的丰产性和稳产性，其产量水平主要分布在6000～7500 kg/hm 2，平均穗数为465．6万/hm 2，平均穗粒数为38．3粒，平均千粒重为38．2 g。相关分析结果表明，穗数与产量呈极显著正相关，穗粒数、千粒重均与产量相关不显著。通径分析结果表明，穗粒数对产量的直接作用最大，其次是穗数，千粒重的作用最小。