Comparisons of WUE in twelve genotypes of winter wheat and the relationship between δ 13 C and WUE

PeerJ

article

Guirong Huang¹  Xinying Zhang¹  Yajing Wang¹  Fu Feng¹  Xurong Mei¹  Xiuli Zhong¹ 

[1] Chinese Academy of Agricultural Sciences, Institute of Environment and Sustainable Development in Agriculture

关键词: Water use efficiency;    Grain yield;    Stable carbon isotope composition;    Winter wheat genotypes;    Grain filling stage;   

DOI  :  10.7717/peerj.6767

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Twelve winter wheat (Triticum aestivum) genotypes were examined for differences in grain yield, water use efficiency (WUE), and stable carbon isotope composition (δ13C) in flag leaves. The plants were subjected to rain-fed treatment and supplemental irrigation at the jointing and anthesis stages, during the 2015–2016 and 2016–2017 winter wheat growing seasons. The relationships between δ13C with grain yield and WUE were analyzed under two different water environments. The results indicated that there were significant differences in δ13C, grain yield, and WUE among wheat genotypes both under rain-fed and supplemental irrigation conditions. The δ13C values increased with grain-filling proceeding, the δ13C being lower under supplemental irrigation treatment than that under rain-fed treatment. The relationships between the average of δ13C with grain yield and WUE were significantly positive during three measurement periods (R2 = 0.5785 − 0.8258), whether under rain-fed or irrigation environments. This suggests that δ13C might be associated with the grain yield and WUE in winter wheat under rain-fed and supplemental irrigation conditions in the climate region of the northwest Huang-Huai-Hai Plain of China.

【 授权许可】

CC BY