Use of genotype-environment interactions to elucidate the pattern of maize root plasticity to nitrogen deficiency

文献类型： 外文期刊

第一作者： Li, Pengcheng

作者： Li, Pengcheng;Zhuang, Zhongjuan;Cai, Hongguang;Cheng, Shuai;Soomro, Ayaz Ali;Liu, Zhigang;Gu, Riliang;Mi, Guohua;Yuan, Lixing;Chen, Fanjun;Li, Pengcheng;Zhuang, Zhongjuan;Cai, Hongguang

作者机构：

关键词： Genotype-environment interactions;nitrogen stress;quantitative trait locus;root morphology;root plasticity;Zea mays L.

期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：7.061； 五年影响因子：6.002 ）

ISSN： 1672-9072

年卷期： 2016 年 58 卷 3 期

页码：

收录情况： SCI

摘要： Maize (Zeamays L.) root morphology exhibits a high degree of phenotypic plasticity to nitrogen (N) deficiency, but the underlying genetic architecture remains to be investigated. Using an advanced BC4F3 population, we investigated the root growth plasticity under two contrasted N levels and identified the quantitative trait loci (QTLs) with QTL-environment (Q x E) interaction effects. Principal components analysis (PCA) on changesofroot traitstoNdeficiency(Delta DLN-HN) showed that root length and biomass contributed for 45.8% in the same magnitude and direction on the first PC, while root traits scattered highly on PC2 and PC3. Hierarchical cluster analysis on traits for DLN-HN further assigned the BC4F3 lines into six groups, in which the special phenotypic responses to N deficiency was presented. These results revealed the complicated root plasticity of maize in response to N deficiency that can be caused by genotype environment (G x E) interactions. Furthermore, QTL mapping using a multi-environment analysis identified 35 QTLs for root traits. Nine of these QTLs exhibited significant Q x E interaction effects. Taken together, our findings contribute to understanding the phenotypic and genotypic pattern of root plasticity to N deficiency, which will be useful for developing maize tolerance cultivars to N deficiency.

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