摘要
[目的]明确影响中熟玉米品种产量的主要因素,为辽宁省中熟玉米品种选育和生产提供参考。[方法]根据2019年参加辽宁省中熟玉米区域试验种植的9个玉米新品种相关的农艺性状数据,利用多元线性回归法对玉米新品种的主要性状进行相关性分析,揭示其变化规律,为玉米农艺性状的选择提供参考。[结果]辽宁省中熟玉米品种与产量密切相关的农艺性状是百粒重、行粒数、出籽率、空秆率和穗长等;百粒重和行粒数是辽宁省中熟玉米杂交种选育的主要影响因素。[结论]在选育中熟玉米品种时,要在保证适当百粒重和果穗长度的前提下,注重选育出籽率高、空秆率低的品种。在高产玉米品种选育中应增强抗倒性、降低空秆率、提高出籽率,适当增加百粒重和穗粗,降低穗位高。
[Objective]The aim of this study was to clarify the main factors affecting the yield of mediummaturing maize varieties,and reference for the breeding and production of mediummaturing maize varieties in Liaoning Province.[Method]According to the data of agronomic traits related to nine new maize varieties cultivated in the regional test of mediummaturing maize in Liaoning Province in 2019,the correlation analysis of the main traits of new maize varieties was carried out by using the multiple linear regression method,and the variation law was revealed to provide reference for the selection of agronomic traits of maize.[Result]The agronomic traits closely related to yield of mediummaturing maize varieties in Liaoning Province were 100grain weight,kernel number per row,seed yield,empty stalk rate and ear length.100seed weight and kernel number per row were the main factors affecting the breeding of midmaturing maize hybrids in Liaoning Province.[Conclusion]When breeding medium maturity maize varieties,we should pay attention to breeding varieties with high seed rate and low empty stalk rate on the premise of ensuring appropriate 100grain weight and ear length.In the breeding of high yield maize varieties,lodging resistance should be enhanced,empty stalk rate should be reduced,seed yield should be increased,100grain weight and ear diameter should be appropriately increased,and ear height should be reduced.
作者
李永军
崔雪艳
张健
陈岩
LI Yong-jun(Liaoning Institute of Sandy Land Management and Utilization,Fuxin,Liaoning 123000)
出处
《园艺与种苗》
CAS
2021年第4期80-81,92,共3页
Horticulture & Seed
关键词
玉米品种
产量
多元线性回归
相关性分析
Maize varieties
Yield
Multiple linear regression
Correlation analysis
