Variation of carbohydrates and macronutrients during the flowering stage in canola (Brasscia napus L.) plants with contrasting seed oil content

Shuijin Hua, Huasheng Yu, Yaofeng Zhang, Baogang Lin, Houdong Ding, Dongqing Zhang, Yun Ren, Zhong-Hua Chen

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Determination of dynamics of the physiological traits that affect the seed oil content in canola (Brassica napus L.) is essential for high seed oil content breeding programs. The main purpose of the present experiments was to explore the relationship between seed oil content and carbohydrates, N and P content of various canola aboveground tissues during flowering stage using two recombinant inbred lines RILS. Two field experiments were performed simultaneously in both 2010 and 2011. In experiment 1, seed yield and quality were compared between two RILs with contrasting seed oil content, that is, high oil content line (HOCL) and low oil content line (LOCL) at 50.4% and 41.4%, respectively. In experiment 2, our results showed the HOCL produced markedly more biomass in the reproductive organs by 9.9% and 30% at 35 days after anthesis (DAA) in 2010 and 2011, respectively. Furthermore, compared with LOCL, HOCL accumulated higher fructose, sucrose, and P content in the reproductive organs at the late flowering stage, with an average increment of 85.0%, 31.1%, and 12.4% at 35 DAA, respectively. However, the mean N content in the reproductive organs of HOCL was 17.27% lower than that in LOCL at 35DAA. These results reveal the importance of the higher reproductive organ C/N ratio in the regulation of the higher seed oil content of HOCL. Therefore, the C/N ratio of the reproductive organ may be a useful physiological indicator to screen canola lines for high seed oil content in future breeding program.
    Original languageEnglish
    Pages (from-to)1275-1282
    Number of pages8
    JournalAustralian Journal of Crop Science
    Volume6
    Issue number8
    Publication statusPublished - 2012

    Keywords

    • rape (plant)
    • canola
    • biomass
    • carbohydrates
    • oilseed plants
    • nutrients

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