| 卢宇鹏 1，夏岩石1，温少波 1，李荣华 1，李光光 2，张 华 2，郭培国 1.不同熟性菜心品质性状的多样性分析[J].广东农业科学,2020,47(5):36- |
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不同熟性菜心品质性状的多样性分析 |
| Diversity of Quality Traits of Chinese Flowering Cabbage Varieties with Different Maturity |
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| DOI：10.16768/j.issn.1004-874X.2020.05.004 |
| 中文关键词: 菜心 品质性状 遗传多样性 主成分分析 聚类分析 |
| 英文关键词: Chinese flowering cabbage quality traits genetic diversity principal component analysis cluster analysis |
| 基金项目:29 |
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| 摘要点击次数: 1357 |
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| 中文摘要: |
| 【目的】综合评价菜心群体的品质性状，筛选特异种质资源，为高品质菜心种质的开发利用提供理论参考。【方法】收集 120 份具有不同熟性的菜心种质材料，选择 8 个外观品质和 2 个营养品质进行遗传多样性分析，并对全部菜心材料进行主成分分析和聚类分析。【结果】10 个品质性状的变异系数在 11.17% ~ 42.76% 之间，其中最大叶柄长的变异系数最大，叶绿素含量的变异系数最小。除叶绿素含量、叶形和硝酸盐含量外，早熟型菜心的开展度、最大叶长、叶宽、叶柄长、薹高、薹粗、可溶性蛋白含量等 7 个指标都显著小于晚熟型；中熟型菜心的硝酸盐含量最低，其外观品质也最符合优质菜心商品性状的一般要求。主成分分析显示，10 个品质性状可转化为 3 个主成分，累计贡献率达到 80.813%，其中最大叶长、叶宽、叶柄长、叶形和叶色等5 个性状能代表菜心品质性状的大部分信息。聚类分析将 120 份菜心种质分为两大类和 6 个亚类，其中Ⅱ - Ⅱ亚类菜心的综合品质性状表现优良，可直接利用或者作为较好的亲本材料。【结论】收集的菜心材料在品质性状方面差异较明显，蕴藏着较丰富的遗传变异，在品质方面存在部分可供育种和生产利用的种质资源。 |
| 英文摘要: |
| 【Objective】The objective of this study was to evaluate quality traits and select specific germplasm resources of Chinese flowering cabbage, which provided theoretical references for the development and utilization of Chinese flowering cabbage with high quality.【Method】120 Chinese flowering cabbage accessions with different maturities were collected. The genetic diversity analysis was conducted for 8 appearance qualities and 2 nutritional qualities, and all Chinese flowering cabbage accessions were evaluated by principal component analysis and cluster analysis.【Result】The results showed that the variation coefficients of 10 quality traits of Chinese flowering cabbage resources ranged from 11.17% to 42.76%. The variation coefficient of maximum petiole length was the largest and that of chlorophyll content was the smallest. Except for chlorophyll content, leaf shape and nitrate content, the plant expansion, the maximum leaf length, leaf width and petiole length, stalk height, stalk diameter, and soluble protein content of flowering cabbage of early maturity were significantly lower than those of late maturity. The nitrate content of Chinese flowering cabbage of mid-maturity was the lowest and the other appearance quality traits also fulfilled the requirements for commodity characters of high quality Chinese flowering cabbage. The results of principal component analysis showed that 10 quality traits could be transformed to 3 main component factors, with the total contribution rate of 80.813%, indicating that these 5 traits including the maximum leaf length, leaf width and petiole length, leaf type and leaf color could represent most of the quality trait information of Chinese flowering cabbage. According to cluster analysis, 120 Chinese flowering cabbage accessions were divided into 2 groups and six subgroups, among which the sub-group II-II had excellent comprehensive quality traits and could be used directly or selected as good parental materials.【Conclusion】There are obvious differences in quality traits of the collected Chinese flowering cabbage accessions which have. rich genetic variations. Some germplasm resources with high quality can be used for breeding and production as well as utilization. |
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