干旱条件下冬小麦近等基因系水分利用效率及其与气冠温差的关系

发布时间：2018-04-16 03:37

本文选题：气冠温差 + 产量　；参考：《华北农学报》2016年05期

【摘要】：鉴定比较供体亲本京411和轮回亲本晋麦47及其34个近等基因系材料之间产量和水分利用效率(WUE),同时测定不同生育期的气冠温差(CTD),分析WUE在这些材料之间的变异范围,筛选WUE与轮回亲本显著差异的材料用于QTL定位,同时探索干旱条件下CTD与产量和WUE的关系及其随生育期进程变化的趋势。利用防雨棚和渗漏池开展模拟干旱试验。结果表明,34个近等基因系及其父母本WUE为1.30~1.92 kg/m~3,其中9个品系WUE显著低于轮回亲本晋麦47,表明WUE为多基因控制的数量性状,而且存在明显的加性效应。CTD与产量和WUE均呈极显著正相关关系。不同的是,随生育期进程推进,CTD与产量的相关性增强,在灌浆期最高,R2达到0.684 9,而与WUE的相关性减弱,R2在拔节-孕穗期最高,达到0.769 8。研究初步表明,CTD可以作为干旱条件下产量和WUE的鉴定指标。
[Abstract]:The yield and water use efficiency (Wue) of Jinmai 47, a donor parent, and Jinmai 47, a donor parent, were identified and compared. At the same time, the variation range of WUE in these lines was analyzed.The materials with significant difference between WUE and recurrent parents were screened for QTL mapping. The relationship between CTD and yield and WUE under drought conditions and the changing trend with the growth stage were explored.The simulated drought test was carried out by using rainproof shed and leakage pool.The results showed that the WUE of 34 near-isogenic lines and their parents was 1.30 ~ 1.92 kg / m ~ (3), of which 9 lines were significantly lower than their recurrent parent Jinmai 47, indicating that WUE was a quantitative trait controlled by polygenes.Moreover, there was a significant positive correlation between the additive effect. CTD and yield and WUE.Different, the correlation between WUE and yield was increased with the development of growth stage, the highest R2 was 0.684 at filling stage, but the correlation with WUE was the highest at jointing and booting stage, reaching 0.769 8.The results showed that CTD could be used to identify yield and WUE under drought condition.
【作者单位】：中国农业科学院农业环境与可持续发展研究所国家作物高效用水与抗灾减损工程实验室农业部旱作节水农业重点开放实验室;
【基金】：国家“十二五”“863”计划课题(2011AA100501)
【分类号】：S512.11;S423

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