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Phenological optimization of late reproductive phase for raising wheat yield potential in irrigated mega-environments

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Title Phenological optimization of late reproductive phase for raising wheat yield potential in irrigated mega-environments
 
Creator Pengcheng Hu
Chapman, Scott C.
Sukumaran, Sivakumar
Reynolds, Matthew P.
Bangyou Zheng
 
Subject breeding
crop modelling
environment
phenology
spring wheat
yield potential
physiology
 
Description Increasing grain number through fine-tuning duration of the late reproductive phase (LRP; terminal spikelet to anthesis) without altering anthesis time has been proposed as a genetic strategy to increase yield potential (YP) of wheat. Here we conducted a modelling analysis to evaluate the potential of fine-tuning LRP in raising YP in irrigated mega-environments. Using the known optimal anthesis and sowing date of current elite benchmark genotypes, we applied a gene-based phenology model for long-term simulations of phenological stages and yield-related variables of all potential germplasm with the same duration to anthesis as the benchmark genotypes. These diverse genotypes had the same duration to anthesis but varying LRP duration. Lengthening LRP increased YP and harvest index by increasing grain number to some extent and an excessively long LRP reduced YP due to reduced time for canopy construction for high biomass production of pre-anthesis phase. The current elite genotypes could have their LRP extended for higher YP in most sites. Genotypes with a ratio of the duration of LRP to pre-anthesis phase of about 0.42 ensured high yields (≥95% of YP) with their optimal sowing and anthesis dates. Optimization of intermediate growth stages could be further evaluated in breeding programmes to improve YP.
 
Date 2022-06-24
2023-03-03T16:20:43Z
2023-03-03T16:20:43Z
 
Type Journal Article
 
Identifier Hu, P., Chapman, S.C., Sukumaran, S., Reynolds, M. and Zheng, B. 2022. Phenological optimization of late reproductive phase for raising wheat yield potential in irrigated mega-environments. Journal of Experimental Botany, 73(12), 4236–4249. https://hdl.handle.net/10883/22126
0022-0957
1460-2431
https://hdl.handle.net/10568/129181
https://hdl.handle.net/10883/22126
https://doi.org/10.1093/jxb/erac144
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format application/pdf
 
Publisher Oxford University Press (OUP)
 
Source Journal of Experimental Botany