摘要
以10个马铃薯品种为试验对象,通过相关性分析、多元线性回归分析与通径分析等方法解析了生育期(X_(1))、株高(X_(2))、单株主茎数(X_(3))、块茎干物质含量(X_(4))与大中薯率(X_(5))5个主要农艺性状对马铃薯产量(Y)的影响。结果表明:大中薯率、株高和生育期是影响马铃薯产量的主要因素。相关分析表明:大中薯率与产量呈极显著正相关(r=0.449),株高与产量呈显著正相关(r=0.273),提高株高与大中薯率能够提升马铃薯产量。多元线性逐步回归分析结果显示:马铃薯产量的最优回归方程为Y=-65.058+0.454X_(1)+0.459X_(2)+0.720X_(5);由间接通径系数可知,生育期与株高通过大中薯率的间接通径系数分别为-0.242与-0.240,说明生育期与株高通过大中薯率间接对马铃薯产量具有重要影响。
Using 10 potato varieties as experimental subjects,this study analyzed the effects of five major agronomic traits including growth period(X_(1)),plant height(X_(2)),number of main stems per plant(X_(3)),tuber dry matter content(X_(4)),and medium-to-large tuber rate(X_(5))on potato yield(Y)through correlation analysis,multiple linear regression analysis and path analysis.The results showed that medium-to-large tuber rate,plant height and growth period were the primary factors influencing potato yield.Correlation analysis revealed a highly significant positive correlation between medium-to-large tuber rate and yield(r=0.449),while plant height showed a significant positive correlation with yield(r=0.273).Increasing plant height and medium-to-large tuber rate could enhance potato yield.Multiple linear stepwise regression analysis demonstrated that the optimal regression equation for potato yield was Y=-65.058+0.454X_(1)+0.459X_(2)+0.720X_(5).Path analysis coefficients revealed that growth period and plant height exerted indirect effects on yield through medium-to-large tuber rate with coefficients of-0.242 and-0.240 respectively,indicating their substantial influence on potato yield via this pathway.
作者
张洋
辛佳佳
涂玉琴
张南峰
汤洁
ZHANG Yang;XIN Jia-jia;TU Yu-qin;ZHANG Nan-feng;TANG Jie(Crops Research Institute,Jiangxi Academy of Agricultural Sciences/Jiangxi Key Laboratory of Oilcrops Genetics Improvement,Nanchang 330200,China)
出处
《江西农业学报》
2025年第12期33-38,48,共7页
Acta Agriculturae Jiangxi
基金
江西现代农业科研协同创新专项“江西省薯类作物特色地方品种资源繁种鉴定与优异性状挖掘利用”(JXXTCX202205)。
关键词
马铃薯
产量
农艺性状
通径分析
Solanum tuberosum L.
Yield
Agronomic trait
Path analysis
