CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2023, Vol. 45 ›› Issue (1): 56-62.doi: 10.19802/j.issn.1007-9084.2022087

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Analysis of phosphorus efficiency and screening of P-efficient germplasm on natural population of oilseed rape (Brassica napus) at seedling stage

Yan-ling CHEN1,2(), Ning WANG1, Lei SHI2()   

  1. 1.Pingliang Agricultural Products Quality Safety Inspection and Testing Center, Pingliang 744000, China
    2.National Key Lab of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2022-03-29 Online:2023-02-25 Published:2023-03-03
  • Contact: Lei SHI E-mail:1746963465@qq.com;leish@mail.hzau.edu.cn


Screening of phosphorus (P)-efficient germplasm of oilseed rape (Brassica napus L.) will provide elite materials for P heredity and P-efficient breeding. In this study, 400 varieties of natural population of oilseed rape (B. napus) was used to evaluate P efficiency at seedling stage under 2 experiments by hydroponic culture, named EXP. Ⅰ and EXP. Ⅱ, respectively. Under normal P and low P conditions, RDW (root dry weight), SDW (shoot dry weight), RSR (root : shoot ratio), PRL (primary root length) and PEC (phosphorus efficiency coefficient) of the natural population showed normal distribution, indicating that there existed abundant genetic variation in the natural population. P efficiency of the natural population of B. napus at the seedling stage was determined by the parameter of SDWLP and PEC. Among them, 17 P-efficient and 13 P-inefficient candidate varieties were obtained in EXP. Ⅰ, while 17 P-efficient and 18 P-inefficient candidate varieties were obtained in EXP. Ⅱ. Based on the 2 experiments, totally 32 P-efficient and 31 P-inefficient candidate varieties were identified for further work.

Key words: Brassica napus, phosphorus, phosphorus efficiency, germplasm screening

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