作物学报2026，Vol.52Issue(5)：1309-1325,17.DOI:10.3724/SP.J.1006.2026.53083
201份玉米自交系抗旱表型评价及可塑性分析
Phenotypic evaluation and plasticity analysis of drought resistance in 201 maize inbred lines
摘要
Abstract
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.关键词
玉米/KA105/基因型与环境互作/抗旱可塑性/产量Key words
maize/KA105/genotype×environment interaction(G×E)/drought resistant plasticity/yield引用本文复制引用
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..201份玉米自交系抗旱表型评价及可塑性分析[J].作物学报,2026,52(5):1309-1325,17.基金项目
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). （2024ZY-CGZY-17）
