Temperature response of wheat affects final height and the timing of stem elongation under field conditions
OPEN ACCESS
Loading...
Author / Producer
Date
2021-02-02
Publication Type
Journal Article, Journal Article
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Rights / License
Abstract
In wheat, temperature affects the timing and intensity of stem elongation. Genetic variation for this process is therefore important for adaptation. This study investigates the genetic response to temperature fluctuations during stem elongation and its relationship to phenology and height. Canopy height of 315 wheat genotypes (GABI wheat panel) was scanned twice weekly in the field phenotyping platform (FIP) of ETH Zurich using a LIDAR. Temperature response was modelled using linear regressions between stem elongation and mean temperature in each measurement interval. This led to a temperature-responsive (slope) and a temperature-irresponsive (intercept) component. The temperature response was highly heritable (H$^2$=0.81) and positively related to a later start and end of stem elongation as well as final height. Genome-wide association mapping revealed three temperature-responsive and four temperature-irresponsive quantitative trait loci (QTLs). Furthermore, putative candidate genes for temperature-responsive QTLs were frequently related to the flowering pathway in Arabidopsis thaliana, whereas temperature-irresponsive QTLs corresponded to growth and reduced height genes. In combination with Rht and Ppd alleles, these loci, together with the loci for the timing of stem elongation, accounted for 71% of the variability in height. This demonstrates how high-throughput field phenotyping combined with environmental covariates can contribute to a smarter selection of climate-resilient crops.
Permanent link
Publication status
published
External links
Editor
Book title
Journal / series
Volume
72 (2)
Pages / Article No.
700 - 717
Publisher
Oxford University Press
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Development; field phenotyping; GWAS; LIDAR; physiology; plant height; temperature response; wheat
Organisational unit
03894 - Walter, Achim / Walter, Achim
03969 - Studer, Bruno / Studer, Bruno
Notes
Funding
169542 - PhenoCOOL: Wheat and soybean phenotyping under cold conditions using growth as a dynamic trait (SNF)