Abstract
In this study, 48 non-heading Chinese cabbage germplasms collected in the Third National Survey and Collection Action on Crop Germplasm Resources in Zhejiang Province were used as materials for phenotypic identification and genetic diversity analysis. The results showed that the variation coefficient of 10 quantitative characters ranged from 23.33% to 50.29%, and the genetic diversity index ranged from 1.26 to 2.01. And the variation coefficients of 9 quality traits ranged from 14.57% to 65.77%, and the genetic diversity index ranged from 0.29 to 1.61. There was a high correlation between different characters, and a significant positive correlation between plant height, plant width, leaf length and petiole length, besides, the number of lotus leaves was negatively correlated with other characters. The cumulative contribution rate of first 5 principal components is 76.587%, which contains most of the information. The tested materials were classified into 5 groups by cluster analysis. The first group is Wuta-tsai, the second group is mainly erect-type leafy cabbage, the third group is Pak-choi, the fourth group is mainly milk Chinese cabbage and the fifth group is a hybrid group. This study provides theoretical basis for efficient utilization and breeding of non-heading Chinese cabbage germplasm resources in Zhejiang Province.
Highlights
Non-heading Chinese cabbage (Brassica campestris ssp., Chinensis Makino) is one of the Brassica campestris varieties of Brassica genus in the family of Brassicaceae
The variation coefficients of the 10 quantitative traits ranged from 23.33% to 50.29%, among which the rosette leaves number (RLN) and petiole length (PL) were the largest
The genetic diversity of crop germplasm resources is evolved to adapt to the environment, and abundant variation is the genetic basis of variety selection
Summary
Non-heading Chinese cabbage (Brassica campestris ssp., Chinensis Makino) is one of the Brassica campestris varieties of Brassica genus in the family of Brassicaceae. Since the launch of the Third National Survey and Collection Action on Crop Germplasm Resources in Zhejiang Province, a total of 48 local non-heading Chinese cabbage varieties that have been continuously planted in different areas of Zhejiang have been collected. In order to systematically evaluate the diversity and understand the types and characteristics of local non-heading Chinese cabbage varieties in Zhejiang province, we conducted phenotypic evaluation and diversity analysis on 19 agronomic traits of 48 local cabbage varieties in 2019.
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