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98份大葱种质资源农艺性状相关性及主成分分析

2021-09-10王玲燕刘贺娟任福森唐振海董彦琪刘震宇

中国瓜菜 2021年8期

王玲燕 刘贺娟 任福森 唐振海 董彦琪 刘震宇

摘    要:为建立大葱资源综合评价体系,以98份大葱种质资源为材料,对9个主要农艺性状进行多元统计分析。结果表明,多样性指数最高的性状为株高,变异系数最大的为单株质量。单株质量与株高、叶片长、叶横径、假茎长、株幅、假茎底径、假茎中径、单株叶数均呈极显著正相关。通径分析和回归分析结果表明,假茎中径、叶横径、假茎长、假茎底径、单株叶数是影响单株质量的主要因素,最佳多元回归方程:Y=-421.05+44.77X3+3.86X4+11.67X6+126.71X7+8.80X8。主成分分析将大葱的主要性状缩减为2个主成分,即产量性状、株型性状,其贡献率分别为51.82%、23.43%,2个主成分累计贡献率为75.26%,可综合反映9个农艺性状指标的信息。

关键词:大葱;农艺性状;相关分析;主成分分析

中图分类号:S633.1 文献标志码:A 文章编号:1673-2871(2021)08-038-06

Correlation and principal component analysis of agronomic characters of 98 Chinese onion germplasm resources

WANG Lingyan, LIU Hejuan, REN Fusen, TANG Zhenhai, DONG Yanqi, LIU Zhenyu

(Xinxiang Academy of Agricultural Sciences, Xinxiang 453000, Henan, China)

Abstract: In this paper, to establish a comprehensive evaluation system on germplasm resources of Chinese onion, 9 main agronomic characters of 98 resources were used to study by multivariate statistical analysis. The results show that the highest diversity index and coefficient of variation were plant height and plant weight, respectively. According to correlation analysis, the single plant was significantly and positively correlated with plant height, leaf length, leaf transverse diameter, pseudostem length, plant width, pseudostem bottom diameter, pseudostem medium diameter and leaf number per plant. The main factors affecting the quality of single plant, by path analysis and regression analysis, were pseudostem medium diameter, leaf transverse diameter, pseudostem length, pseudostem bottom diameter and the leaf number per plant. Optimal multiple regression equation is Y=-421.05+44.77X3+3.86X4+11.67X6+126.71X7+8.80X8. The main agronomic characters of Chinese onion could be shorten to two principal components by principal component analysis and factor analysis, that is yield characters and plant-type traits with their contribution rates 51.82% and 23.43%, respectively. The cumulative contribution rate of the two principal components was 75.26%. The above results can comprehensively reflect the landscape of 9 agronomic character traits.

Key words: Green Chinese onion; Agronomic traits; Correlation analysis; Principal component analysis

大蔥(Allium fistulosum L.var. giganteam Makino)属百合科(Liliaceae)葱属(Allium),原产亚洲西部高寒地区,由野生葱(A. chrysanthum Regel)经过不断的自然选择和人工驯化而来[1]。经过多年研究,中国具有丰富的大葱种质资源。根据现代农业对作物品种的要求[2],作物育种对有关性状的综合考虑已成为不可忽视的原则,深入研究不同大葱种质资源植物学性状及性状间相互作用关系,有利于充分利用大葱种质资源和发掘、创制出性状优良的大葱品种,对大葱育种研究和创新具有十分重要的意义。

相关性分析是将2个或多个具备相关性的变量元素进行分析,从而衡量2个变量因素的相关密切程度。农作物产量等重要农艺性状则由多基因控制,且基因之间相互关联,适合进行相关性分析。……

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