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| 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 |
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| Abstract: |
| 【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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