Back to Search Start Over

Accounting for the impact of genotype and environment on variation in leaf respiration of wheat in Mexico and Australia.

Authors :
Gaju O
Bloomfield KJ
Negrini ACA
Bowerman AF
Cullerne D
Posch BC
Bryant C
Fan Y
Spence M
Stone B
Gilliham M
Furbank RT
Molero G
Pogson BJ
Mathews K
Millar AH
Pearson AL
Reynolds MP
Stroeher E
Taylor NL
Turnbull MH
Atkin OK
Source :
Journal of experimental botany [J Exp Bot] 2024 Nov 16. Date of Electronic Publication: 2024 Nov 16.
Publication Year :
2024
Publisher :
Ahead of Print

Abstract

An approach to improving radiation use efficiency (RUE) in wheat is to screen for variability in rates of leaf respiration in darkness (Rdark). We used a high-throughput system to quantify variation in Rdark among a diverse range of spring wheat genotypes (301 lines) grown in two countries (Mexico and Australia) and two seasons (2017 and 2018), and in doing so quantify the relative importance of genotype (G) and environment (E) in influencing variations in leaf Rdark. Through careful design, residual (unexplained) variation represented less than 10% of the total observed. Up to a third of the variation in Rdark (and related traits) was under genetic control. This suggests opportunities for breeders to use Rdark as a novel selection tool. In addition, E accounted for more than half of the total variation in area-based rates of Rdark. Here, the day of measurement was crucial, suggesting that day-to-day variations in the environment influence rates of Rdark measured at a common temperature. Overall, this study provides new insights into the role G and E play in determining variation in rates of leaf Rdark of one of the most important cereal crops, with implications for future improvements in carbon use efficiency and yield.<br /> (© The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology.)

Details

Language :
English
ISSN :
1460-2431
Database :
MEDLINE
Journal :
Journal of experimental botany
Publication Type :
Academic Journal
Accession number :
39548831
Full Text :
https://doi.org/10.1093/jxb/erae449