Phenotyping and evaluation of CIMMYT WPHYSGP nursery lines and local wheat varieties under two irrigation regimes
文献类型： 外文期刊
作者： Zhang, Yueqiang 1 ; Wang, Zhong 2 ; Fan, Zheru 2 ; Li, Jianfeng 2 ; Gao, Xin 2 ; Zhang, Hongzhi 2 ; Zhao, Qi 2 ; Wang, Zh 1 ;
作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China
2.Xinjiang Acad Agr Sci, Inst Nucl & Biol Technol, Key Lab Crop Ecophysiol & Farming Syst Desert Oas, Minist Agr, Urumqi 830091, Xinjiang, Peoples R China
3.Xinjiang Acad Agr Sci, Urumqi 830091, Xinjiang, Peoples R China
4.Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Plant Cell & Chromosome Engn, Beijing 100101, Peoples R China
关键词： wheat; phenotype; evaluation; drought-stress
期刊名称：BREEDING SCIENCE （ 2020影响因子：2.086； 五年影响因子：2.632 ）
ISSN： 1344-7610
年卷期： 2019 年 69 卷 1 期
收录情况： SCI
摘要： Accurate evaluation of morphological and physiological traits is critical for selection of wheat (Triticum aestivum L.) cultivars exhibiting high yield, which is stable over different growing conditions. In order to use selection index based on high yield, high grain quality and drought tolerance in wheat, a set of 145 CIMMYT Wheat Physiological Germplasm Screening Nursery lines and seven local spring wheat varieties were phcnotyped and evaluated for physiological and yield traits under two irrigation regimes during the 2011 and 2012 growing seasons in Xinjiang, China. The results showed that drought-stress significantly increased canopy temperature but reduced grain yield, grain weight per spike, normalized difference vegetation index at the flowering and grain filling stages, chlorophyll content at the grain filling stage, grain plumpness, grain number per spike, thousand-grain weight, and plant height. Grain weight per spike. plant height and grain plumpness explained 61.8% of the total phenotypic variation in grain yield under no-stress conditions, where they were the three principal factors most closely related to grain yield. Under drought-stress conditions, canopy temperature at the grain filling stage, plant height and grain plumpness were the three principal factors affecting grain yield, and contributed 44.8% of the total phenotypic variation in grain yield. Finally, ten genotypes, including three local varieties, 'Xinchun 11', 'Xinchun 23' and 'Xinchun 29', with appropriate plant height and high and stable yield under both no-stress and drought-stress conditions over the two years of trials, were identified and can be recommended as core parents for spring wheat drought tolerance breeding in Xinjiang, China.
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