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干旱胁迫对不同彩粒小麦苗期生长发育的影响
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引用本文:张健龙,易 科,张一岚,赵一迪,晁漫宁,谈宏斌,孙风丽,奚亚军,张 超.干旱胁迫对不同彩粒小麦苗期生长发育的影响[J].西北农业学报,2020,30(6):842~850
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张健龙,易 科,张一岚,赵一迪,晁漫宁,谈宏斌,孙风丽,奚亚军,张 超 (1. 西北农林科技大学 农学院陕西杨凌 7121002. 农业农村部西北地区小麦生物学与遗传育种重点实验室陕西杨凌 7121003. 陕西省种业集团有限责任公司西安 710016) 
基金项目:国家重点研发计划项目(2017YFD0300202);陕西省杨凌高新农业示范区产学研用协同创新重大项目(2018CXY-06)。
中文摘要:为了筛选具有优良抗旱性的小麦特异材料,通过表型分析与生理生化指标测定相结合的方法,分析干旱胁迫对不同彩粒小麦苗期生长发育的影响。结果表明,不同小麦材料在重度干旱胁迫下植株表型、复水后成活率、叶片相对含水量、叶绿素质量分数、脯氨酸质量分数及叶绿素荧光参数均存在显著差异,其中多个指标均显示2份彩粒小麦材料抗旱性较好,即‘ZHW’/‘小偃22’杂交后代和‘0705-39’/‘INDB’杂交后代材料。对各指标进行相关性分析发现,植株复水后成活率与叶片相对含水量、脯氨酸质量分数、叶绿素质量分数之间存在极显著的相关,叶片相对含水量与Fv/FmETRqP存在显著相关。抗旱表型分析与生理生化指标测定结果显示干旱胁迫显著影响不同彩粒小麦的苗期生长发育,且不同彩粒小麦抗旱性存在显著差异,筛选的2份抗旱性较好的彩粒小麦材料可用于进一步的抗旱分子机制解析和旱地小麦育种。
中文关键词:彩粒小麦  种质资源  干旱胁迫  叶绿素荧光  抗旱鉴定
 
Effects of Drought Stress on Development of Different Colored Wheat at Seedling Stage
Abstract:The identification and utilization of excellent germplasm resources are the basis for plant breeding and analysis in the molecular mechanism of drought resistance. For screening materials with excellent drought resistance, we conducted a phenotypic analysis in development of different colored wheat under drought stress, and determined physiological and biochemical indices.Among different colored wheat materials under severe drought stress,significant differences were shown in plant phenotypes,survival rates after rehydration, relative water in leaves, chlorophyll mass fraction, proline mass fraction and chlorophyll fluorescence.Several indicators showed that two materials including the ‘ZHW’/‘Xiaoyan 22’ and ‘0705-39’/‘INDB’ hybrid progenies had better drought resistance.The survival rate after rehydration was significantly correlated with the leaf relative water, proline, chlorophyll contents.And the leaf relative water content was significantly correlated with the Fv/Fm, ETR, and qP. Drought-resistant phenotype analysis and the examination of physiological and biochemical indicators showed that drought stress significantly affected the growth and development of different colored wheat at the seedling stage, but it had significant differences in drought resistance among varieties. As a result, two wheat materials with good drought resistance could be identified by screening, which could be used for further analyzing the molecular mechanisms of drought resistance for wheat breeding in dry areas.
keywords:Colored wheat  Germplasm resources  Drought stress  Chlorophyll fluorescence  Drought resistance identification
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