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      2. 水稻核心種質資源莖稈抗倒伏性研究
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        1.華中農業大學植物科學技術學院;2.華中農業大學作物遺傳改良國家重點實驗室

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        國家重點研發計劃專項


        Studies on lodging index of core germplasm and stem traits
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        1.National Key Laboratory of Crop Genetic Improvement,Huazhong Agricultural University;2.College of Plant Science and Technology, Huazhong Agricultural University

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          摘要:

          為了探究不同株高、重心高度及基部莖稈性狀對水稻抗倒伏能力的影響,以533份水稻核心種質資源為試驗材料,在2種栽培條件下,對10個性狀進行相關分析和通徑分析,結果表明:低株高水稻基部第1節間壁厚和基部抗折力對倒伏指數有協同作用,低株高水稻抗倒伏莖稈性狀改良應集中在基部第1節間莖粗壁厚,高株高水稻倒伏性更易受株高和重心高度的影響,高株高水稻抗倒伏性狀改良應集中在基部第2節間莖粗,增強水稻莖稈基部抗折力是提高不同株高水稻抗倒伏能力最佳的途徑之一。

          Abstract:

          In order to explore the effects of different plant height, center of gravity height and basal stem traits on lodging resistance of rice, In this study, 533 core rice germplasms were used as experimental materials, and 10 traits were analyzed by correlation and path analysis under two cultivation modes of pot culture and field culture.The results show that the first internode wall thickness and basal stem breaking-resistant strength of the low-plant rice have synergy on the lodging index.The improvement of lodging resistance traits of low-plant rice should focus on the first internode stem thickness and wall thickness. The lodging of high-plant rice is more affected by plant height and height of centre of gravity and the improvement of lodging resistance should be concentrated in the second internode stem thickness.The improvement of lodging resistance of rice germplasm with different plant heights can be achieved by enhancing the bending strength of the base. This study would provide an important reference for the improvement of lodging resistance in different rice plants.

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        歷史
        • 收稿日期:2020-06-08
        • 最后修改日期:2020-08-25
        • 錄用日期:2020-09-17
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