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CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2021, Vol. 43 ›› Issue (6): 1052-1060.doi: 10.19802/j.issn.1007-9084.2020255

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Development of a core collection in sunflower (Helianthus annuus L.) germplasm using phenotypic diversity

Lei WANG(), Jiao-mei WANG, Wei WANG, Ling WANG, Li-jun WANG, Xing-chu YAN, Mei-lian TAN()   

  1. Oil Crops Research Institute of Chinese Academy of Agricultural Science/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
  • Received:2020-08-26 Online:2021-12-22 Published:2021-12-23
  • Contact: Mei-lian TAN E-mail:kaoyan84@126.com;meiliantan@126.com

Abstract:

To evaluate phenotypic characteristics of sunflower germplasm and select core collection in southern China, 11 phenotypic traits from 422 sunflowers were analyzed and evaluated using descriptive statistics, correlation analysis and principal component analysis in 2016 and 2018. A wide variation was found with coefficient of variation ranged from 3.60% to 83.32% including several important characteristics as branching rate (0%-62.5%), seed weight per plant (9.70-232.35 g), hundred-grain weight (4.60-14.92 g), number of leaf (14.40-48.38) and plant height (103.75-260.00 cm). Significant correlations were observed between traits. Principal component analysis showed that 4 main components affecting the traits accounted for 71.72% of the total variance. A total of 72 core collections for candidate populations were constructed by using QGAstation 2.0 software. The best core collection was constructed including 84 materials according to their mean difference percentage, variance difference percentage, range coincidence rate and coefficient of variation percentage. The 84 core resources were divided into 5 categories by cluster. Compared with the original population, mean value of the selected core collection had no significant difference, while the variance was significantly increased, which could represent the preservation and utilization of the original sunflower planting resources.

Key words: sunflower, core collection, phenotypic traits, germplasm

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