Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (28): 41-47.doi: 10.11924/j.issn.1000-6850.casb2022-0410

Special Issue: 生物技术 资源与环境 园艺

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Identification and Evaluation on Bolting Traits of Chinese Cabbage Group Germplasm Resources

LAI Jia(), WEI Shugu, HUANG Ling, SHENG Yuzhen, LIU Yong, ZHANG Qianfang, YE Pengsheng()   

  1. Industrial Crops Research Institute, Sichuan Academy of Agricultural Sciences/Vegetable Germplasm Innovation and Variety Improvement Key Laboratory of Sichuan, Chengdu 610300
  • Received:2022-05-16 Revised:2022-07-12 Online:2022-10-05 Published:2022-09-28
  • Contact: YE Pengsheng E-mail:laijia028@163.com;yeps18@163.com

Abstract:

To screen Chinese cabbage group germplasm resources with high bolting tolerance, 233 Chinese cabbage group germplasm resources were studied for open field cultivation. The bolting traits of Chinese cabbage group were comprehensively identified and evaluated by subordinate function method and systematic cluster analysis in budding stage and flowering stage. The variation range of budding stage was 39.00-181.00 days, and the variation range of flowering stage was 46.00-196.00 days. The variation coefficients were 24.53% and 19.80% respectively, indicating that there was rich genetic diversity in bolting traits of Chinese cabbage group germplasm. The 233 Chinese cabbage group germplasm resources were divided into 5 groups by subordinate function method, including 80 extremely bolting-tolerant germplasms. The results of cluster analysis showed that the 233 Chinese cabbage group germplasm resources were divided into 5 groups at the distance coefficient of 4.5, and the extremely bolting-tolerant type of group IV included 63 germplasm resources, all of which belonged to the extremely bolting-tolerant grade classified by subordinate function method, indicating that both subordinate function method and cluster analysis method can effectively identify the bolting tolerance of Chinese cabbage group germplasms.

Key words: Chinese cabbage group, bolting, identification and evaluation, subordinate function method, cluster analysis

CLC Number: