欧洲温室型黄瓜种质资源主要农艺性状遗传多样性分析

Genetic diversity and correlation analysis of main agronomic characters of European greenhouse cucumber germplasm resources

摘要

为了研究欧洲温室型黄瓜农艺性状遗传多样性、亲缘关系，明确种质资源的特征特性，为欧洲温室型黄瓜新品种选育提供参考，对搜集并纯化的 41 份欧洲温室型黄瓜自交系进行了第一雌花节位、叶长、叶宽等 18 个农艺性状鉴定，并进行遗传多样性、相关性和聚类分析。18 个农艺性状间变异系数在 13.36%~76.48%之间，变异系数最大的性状为第一雌花节位，达到 76.48%；变异系数最小的性状为植株生长势，为 13.36%、平均变异系数为 27.78%。单瓜质量和单株产量均与第一雌花节位呈显著正相关；果皮颜色与果皮硬度呈显著正相关，与心腔比呈极显著负相关。在遗传相似系数(GS)为 1.86 时，分为三大类，第一类含有 23 份黄瓜种质资源，占供试材料的 56%；第二类含有 4 份黄瓜种质资源；第三类含有 14 份黄瓜种质资源。41 份欧洲温室型黄瓜材料遗传差异较大，有丰富的遗传多样性，具有较大的育种目标选择潜力，为欧洲温室型黄瓜新品种选育提供了优良资源。

Abstract

In order to study the genetic diversity, genetic relationship and characteristics of agronomic traits of European greenhouse type cucumber germplasm resources and provide reference for breeding new cucumber variety, 18 agronomic traits such as, leaf length, leaf width and the first female flower node position of 41 European greenhouse cucumber materials collected and purified were identified for genetic diversity, correlation and cluster analysis in this experiment. The variation coefficient of 18 agronomic traits was 13.36%-76.48%, the maximum variation coefficient was 76.48% in the first female flower node, the minimum variation coefficient was 13.36 % in plant growth potential with an average coefficient of 27.78%. Leaf length, leaf width and internode length were significantly positively correlated with each other; both single melon mass and per plant melon mass were positively correlated with the first female flower node position. Peel color was significantly positive correlated with peel hardness, and significantly negative correlated with heart-cavity ratio. When the genetic similarity coefficient (GS) is 1.86, European greenhouse cucumber materials divided into three categories, the first category contained 23 cucumber germplasm resources, accounting for 56% of the tested materials. The second category contains 4 cucumber germplasm resources. The third category contains 14 cucumber germplasm resources. The 41 European greenhouse cucumber materials have great genetic differences, are rich in genetic diversity and breeding target selection potential, which provide excellent resources for breeding new European greenhouse cucumber variety.

关键词

黄瓜 / 欧洲温室型 / 多样性分析 / 相关性分析 / 聚类分析

Key words

Cucumber / European greenhouse / Diversity analysis / Correlation analysis / Cluster analysis

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基金资助

山东省生态农业技术体系(SDAIT-30)

国家现代农业产业技术体系(CARS-23)