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Evaluation of quality traits and their genetic variation in global collections of Brassica napus L

Published online by Cambridge University Press:  27 May 2017

Biyun Chen ,
Kun Xu ,
Hao Li ,
Guizhen Gao ,
Guixin Yan ,
Jiangwei Qiao  and
Xiaoming Wu
Biyun Chen
Affiliation:
Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crop Research Institute, Chinese Academy of Agricultural Sciences, Xudong 2nd Road No. 2, Wuhan 430062, China
Kun Xu
Affiliation:
Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crop Research Institute, Chinese Academy of Agricultural Sciences, Xudong 2nd Road No. 2, Wuhan 430062, China
Hao Li
Affiliation:
Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crop Research Institute, Chinese Academy of Agricultural Sciences, Xudong 2nd Road No. 2, Wuhan 430062, China
Guizhen Gao
Affiliation:
Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crop Research Institute, Chinese Academy of Agricultural Sciences, Xudong 2nd Road No. 2, Wuhan 430062, China
Guixin Yan
Affiliation:
Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crop Research Institute, Chinese Academy of Agricultural Sciences, Xudong 2nd Road No. 2, Wuhan 430062, China
Jiangwei Qiao
Affiliation:
Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crop Research Institute, Chinese Academy of Agricultural Sciences, Xudong 2nd Road No. 2, Wuhan 430062, China
Xiaoming Wu*
Affiliation:
Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crop Research Institute, Chinese Academy of Agricultural Sciences, Xudong 2nd Road No. 2, Wuhan 430062, China
*
*Corresponding author. E-mail: [email protected]
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Abstract

Evaluating quality traits is important to the selection of elite lines in Brassica napus L. In this study, the quality traits of 488 global collections of B. napus L were evaluated for two consecutive years under central Chinese growing conditions, and a series of phenotypic data was obtained. The measured total glucosinolate content (GLC) and erucic acid content (ERU) values for 95.5% of the accessions were consistent with the original values, and large variations in quality traits were found among these accessions, thus enabling selection for these characters. In general, Chinese accessions tended to have a higher oil content (OC) than foreign accessions, while compared with winter and spring accessions, semi-winter accessions tended to have the highest OC. The mean GLC and ERU of Chinese rapeseed accessions showed gradual downward trends over time, and the genotypic variation in ERU accounted for 98.44% of the total variation, which was the highest among all 10 of the quality traits. Additionally, the heritability for ERU was largest among all 10 of the quality traits. Significant correlations were observed between different traits; OC had significantly (P < 0.01) negative correlation coefficients with oleic acid content, whereas OC had significantly (P < 0.01) positive correlation coefficients with ERU. Principal component analysis revealed that there was no clear boundary among materials of different geographic origins and different ecotypes according to the first two principal coordinates, respectively. This information about variations in quality traits revealed in this study could identify parents for improved rapeseed breeding.

Keywords

Brassica napus Lgenetic diversitygenetic variationplant breedingquality trait
Type
Research Article
Information
Plant Genetic Resources , Volume 16 , Issue 2 , April 2018 , pp. 146 - 155
Copyright
Copyright © NIAB 2017 

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