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Behavior of durum wheat genotypes under normal irrigation and drought stress conditions in the greenhouse

机译：温室正常灌溉和干旱胁迫条件下杜兰姆小麦基因型的行为

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摘要

Drought is a major problem reducing agronomic crop production worldwide. Increasing the genetic potential of yield in water deficit condition is one of the major objectives of durum wheat breeding programs in Iran and other countries. This study was conducted to determine drought tolerant genotypes with high yield in normal and drought stress conditions. Twenty-five durum wheat genotypes were tested in a randomized complete block design with three replications under greenhouse condition during 2010 and 2011. Eight drought tolerance indices mean productivity (MP), tolerance index (TOL), geometric mean productivity (GMP), stress susceptibility index (SSI), yield index (YI), harmonic mean (HARM), yield stability index (YSI) and stress tolerance index (STI) were applied on the basis of grain yield in drought stress (Ys) and normal irrigation (Yp) conditions. Based on different drought indices,?pol-dash (1) and chakmak?genotypes were more drought tolerant than the other genotypes.?3Dgraphs,?Bi-plot and cluster analysis?confirmed?these?results.?Principal components analysis showed two components which explained 98.0% variation. Genotypes were grouped in cluster analysis (using Ward’s method) based on Yp, Ys and quantitative indices of drought tolerance.?Finally,?the?results of correlation and other analysis showed that the most suitable indices to screen genotypes in drought stress condition were MP, STI, GMP and HARM.
机译：干旱是在全球范围内减少农艺作物生产的主要问题。提高水资源赤字状况的遗传潜力是伊朗和其他国家的杜兰姆小麦育种计划的主要目标之一。进行该研究以确定具有正常和干旱胁迫条件高产率的干旱耐受性基因型。在2010年和2011年，在随机的完全块设计中测试了二十五个杜伦特小麦基因型，在随机的完全块设计中进行了三种复制.8次干旱公差指数平均生产率（MP），公差指数（TOL），几何平均生产率（GMP），应力易感性指数（SSI），产量指数（yi），谐波平均值（危害），产量稳定性指数（YSI）和应力耐受指数（STI）基于干旱胁迫（YS）和正常灌溉（YP）使适应。基于不同的干旱指数，？POL-DASH（1）和Chakmak？基因型比其他基因型更具干旱。？3DGraphs ,?bi-plot和群集分析？确认？结果。α主成分分析显示两个组件这解释了98.0％的变化。基因型在基于yp，ys和旱化的定量指数的基因分析中分组（使用病房的方法）.?INALLY，相关性和其他分析表明，最合适的索引在干旱胁迫条件下筛选基因型，sti，gmp和伤害。

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