201份玉米自交系抗旱表型评价及可塑性分析OA
Phenotypic evaluation and plasticity analysis of drought resistance in 201 maize inbred lines
干旱是限制玉米产量提升的关键因素之一.表型可塑性指特定基因型对环境变化的响应模式.因此,有必要评估玉米自交系的抗旱可塑性.本研究以 2019-2020 年在 5 个环境、2 种水分处理下 201 份玉米材料抗旱性相关数据为基础,基于因子分析等 3 种方法进行抗旱性鉴定,将材料划分为强抗(HR)、抗(R)、中抗(MR)和弱抗(WR)4个抗旱等级,其中,KA105、KB020、综 31 等材料抗旱性较强.同时,基于FW(Finlay-Wilkinson)回归方法对抗旱可塑性进行量化,提出了2种玉米抗旱可塑性模式,即有G×E正向可塑性(基因型在特定环境中具有显著优于其平均表现的正向响应)和无 G×E 正向可塑性(基因型在不同环境中表现相对稳定,且未在特定环境中表现出显著优于其平均水平的正向响应).其中,KA105、M1801 等属于有G×E正向可塑性,09B-6-2 等属于无G×E正向可塑性.综合评价得出,KA105 抗旱性强且具有G×E正向可塑性,可作为适应未来抗旱育种的优异种源,应用前景十分广阔.
Drought is the primary constraint limiting maize yield improvement.Phenotypic plasticity describes how a given genotype responds to environmental variation;therefore,evaluating drought plasticity in maize inbred lines is essential.Using drought-resistance-related data for 201 inbred lines evaluated across five environments and two water regimes during 2019-2020,we assessed drought resistance using three approaches,including factor analysis,and classified the lines into four levels:highly resistant(HR),resistant(R),moderately resistant(MR),and weakly resistant(WR).Lines such as KA105,KB020,and Zong 31 showed strong drought resistance.Plasticity was then quantified using the Finlay-Wilkinson(FW)regression,and two drought plasticity patterns were defined:G×E positive plasticity(a genotype shows a significantly better positive response than its overall mean performance in specific environments)and no G×E positive plasticity(a genotype performs stably across environments and does not show a significantly better positive response relative to its overall mean in any environment).KA105 and M1801 were classified as the G×E positive plasticity type,whereas 09B-6-2 was classified as the no G×E positive plasticity type.Overall,KA105 combined strong drought resistance with G×E positive plasticity,indicating that it is a promising germplasm source for drought-resistance breeding with potential for broad application.
张宁宁;朱万超;徐淑兔;薛吉全;滕雨菲;任娜娜;魏兴卓;闫书豪;樊可心;王永宏;陈文康;张兴华
西北农林科技大学农学院,陕西 杨凌 712100||宁夏农林科学院农作物研究所,宁夏 银川 750011西北农林科技大学农学院,陕西 杨凌 712100西北农林科技大学农学院,陕西 杨凌 712100西北农林科技大学农学院,陕西 杨凌 712100西北农林科技大学农学院,陕西 杨凌 712100宁夏农林科学院农作物研究所,宁夏 银川 750011西北农林科技大学农学院,陕西 杨凌 712100西北农林科技大学农学院,陕西 杨凌 712100西北农林科技大学农学院,陕西 杨凌 712100宁夏农林科学院农作物研究所,宁夏 银川 750011西北农林科技大学农学院,陕西 杨凌 712100西北农林科技大学农学院,陕西 杨凌 712100
玉米KA105基因型与环境互作抗旱可塑性产量
maizeKA105genotype×environment interaction(G×E)drought resistant plasticityyield
《作物学报》 2026 (5)
1309-1325,17
本研究由陕西省中央引导地方资金项目(2024ZY-CGZY-17),陕西省关键核心技术攻关项目(2024NYGG001)和国家"十三五"重点研发计划项目(2018YFD0100200)资助.This study was supported by the Central Government's Guidance Funds for Local Areas Project of Shaanxi Province(2024ZY-CGZY-17),the Key Core Technology Research Project of Shaanxi Province(2024NYGG001),and the National Key R&D Program of China during the 13th Five-Year Plan Period(2018YFD0100200).
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