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Relationship between water use efficiency (WUE) and production of different wheat genotypes at soil water deficit |
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| Authors: | Hu Ya-Chen Shao Hong-Bo Chu Li-Ye Gang Wu |
| Institution: | aTeaching Affairs Department, Jilin Normal University, Siping 13600, Jilin, People's Republic of China bCenter of National Water-saving and Irrigation at Yangling, Centre of Soil and Water Conservation and Eco-environmental Research, The Chinese Academy of Sciences and Northwest A&F University, Yangling 712100, People's Republic of China cBiology Department, College of Molecular and Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China dQingdao Institute of Biomass Energy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao266071, China eState Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, The Chinese Academy of Sciences, Bejing100085, People's Republic of China |
| Abstract: | Through 2-year field experiments, 7 wheat genotypes were better in their field yield. These 7 wheat genotypes and other 3 wheat species, which are being popularized on a large scale in different locations of China, were selected as experimental materials for the sake of measuring their difference in WUE and production and comparing their relationship at soil water deficits, future more, providing better drought resistance lines and theoretical guide for wheat production and practices and exploring anti-drought physiological mechanisms of different wheat genotypes. Under the condition of 3 soil–water–stress treatments (75% field capacity (FC), 55% FC, 45% FC, named level 1, level 2 and level 3, respectively), pot experiments for them were conducted and the related data were collected from their life circle. The main results were as followed: (1) according to the selected soil stress levels, water use efficiency (WUE) of 10 different wheat genotypes was divided into two groups (A and B); group A included genotypes 2, 3, 4, 5, 6, 7, 8, whose WUE decreased basically from level 1 to level 3 and reached individual peak of WUE at level 1; Group 2 included genotypes 1, 9, 10, whose WUE reached their individual peak at level 2; (2) based on total water consumption through all life circle, genotypes 1, 4, 8, 9 had lower water consumption (TWC) at level 1, genotypes 2, 3, 5, 6, 7 lower TWC at level 2, genotype 10 lower TWC at level 3; (3) at level 1, genotypes 2, 3, 4, 5, 6, 7, 8 had higher grain weight of single spike (GWSS), genotypes 1, 9, 10 better GWSS at level 2, which was in good line with individual WUE of different wheat genotypes; (4) by analyzing the indexes related to examining cultivars, it was found that genotypes 1, 2, 3, 4, 5, 6, 9, 10 had longer plant length (PL), spike length (SL), bigger grain number (GN) except genotypes 7 and 8 at level 1, RL was in better line with genotypes 1, 2, 3, 8, 9, 10, but not in the other genotypes at level 1. |
| Keywords: | Triticum aestivum L Resistance drought WUE Anti-oxidative stress Physiological mechanism Soil water stress threshold Anti-drought breeding Bio-water-saving Soil-root biointerface |
| 本文献已被 ScienceDirect PubMed 等数据库收录！ | |