Considerations When Deploying Canopy Temperature to Select High Yielding Wheat Breeding Lines under Drought and Heat Stress
Developing cultivars with improved adaptation to drought and heat stressed environments is a priority for plant breeders. Canopy temperature (CT) is a useful tool for phenotypic selection of tolerant genotypes, as it integrates many physiological responses into a single low-cost measurement. The obj...
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doaj-ef9188b08adc454abebd08c763a481542021-04-02T10:46:52ZengMDPI AGAgronomy2073-43952014-04-014219120110.3390/agronomy4020191agronomy4020191Considerations When Deploying Canopy Temperature to Select High Yielding Wheat Breeding Lines under Drought and Heat StressR. Esten Mason0Ravi P. Singh1Department of Crop, Soil, and Environmental Sciences, University of Arkansas, 115 Plant Sciences Building, Fayetteville, AR 72701, USAInternational Maize and Wheat Improvement Center (CIMMYT), Apdo Postal 6-641, C.P. 06600, D.F. MexicoDeveloping cultivars with improved adaptation to drought and heat stressed environments is a priority for plant breeders. Canopy temperature (CT) is a useful tool for phenotypic selection of tolerant genotypes, as it integrates many physiological responses into a single low-cost measurement. The objective of this study was to determine the ability of CT to predict grain yield within the flow of a wheat breeding program and assess its utility as a tool for indirect selection. CT was measured in both heat and drought stressed field experiments in northwest Mexico on 18 breeding trials totaling 504 spring wheat lines from the International Maize and Wheat Improvement Center (CIMMYT) Irrigated Bread Wheat program. In the heat treatment, CT was significantly correlated with yield (r = −0.26) across all trials, with a maximum coefficient of determination within the individual trials of R2 = 0.36. In the drought treatment, a significant correlation across all trials was only observed when days to heading or plant height was used as a covariate. However, the coefficient of determination within individual trials had a maximum of R2 = 0.54, indicating that genetic background may impact the ability of CT to predict yield. Overall a negative slope in the heat treatment indicated that a cooler canopy provided a yield benefit under stress, and implementing selection strategies for CT may have potential for breeding tolerant genotypes.http://www.mdpi.com/2073-4395/4/2/191wheatphysiologycanopy temperatureabiotic stressheat stressdrought stressplant breeding |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
R. Esten Mason Ravi P. Singh |
spellingShingle |
R. Esten Mason Ravi P. Singh Considerations When Deploying Canopy Temperature to Select High Yielding Wheat Breeding Lines under Drought and Heat Stress Agronomy wheat physiology canopy temperature abiotic stress heat stress drought stress plant breeding |
author_facet |
R. Esten Mason Ravi P. Singh |
author_sort |
R. Esten Mason |
title |
Considerations When Deploying Canopy Temperature to Select High Yielding Wheat Breeding Lines under Drought and Heat Stress |
title_short |
Considerations When Deploying Canopy Temperature to Select High Yielding Wheat Breeding Lines under Drought and Heat Stress |
title_full |
Considerations When Deploying Canopy Temperature to Select High Yielding Wheat Breeding Lines under Drought and Heat Stress |
title_fullStr |
Considerations When Deploying Canopy Temperature to Select High Yielding Wheat Breeding Lines under Drought and Heat Stress |
title_full_unstemmed |
Considerations When Deploying Canopy Temperature to Select High Yielding Wheat Breeding Lines under Drought and Heat Stress |
title_sort |
considerations when deploying canopy temperature to select high yielding wheat breeding lines under drought and heat stress |
publisher |
MDPI AG |
series |
Agronomy |
issn |
2073-4395 |
publishDate |
2014-04-01 |
description |
Developing cultivars with improved adaptation to drought and heat stressed environments is a priority for plant breeders. Canopy temperature (CT) is a useful tool for phenotypic selection of tolerant genotypes, as it integrates many physiological responses into a single low-cost measurement. The objective of this study was to determine the ability of CT to predict grain yield within the flow of a wheat breeding program and assess its utility as a tool for indirect selection. CT was measured in both heat and drought stressed field experiments in northwest Mexico on 18 breeding trials totaling 504 spring wheat lines from the International Maize and Wheat Improvement Center (CIMMYT) Irrigated Bread Wheat program. In the heat treatment, CT was significantly correlated with yield (r = −0.26) across all trials, with a maximum coefficient of determination within the individual trials of R2 = 0.36. In the drought treatment, a significant correlation across all trials was only observed when days to heading or plant height was used as a covariate. However, the coefficient of determination within individual trials had a maximum of R2 = 0.54, indicating that genetic background may impact the ability of CT to predict yield. Overall a negative slope in the heat treatment indicated that a cooler canopy provided a yield benefit under stress, and implementing selection strategies for CT may have potential for breeding tolerant genotypes. |
topic |
wheat physiology canopy temperature abiotic stress heat stress drought stress plant breeding |
url |
http://www.mdpi.com/2073-4395/4/2/191 |
work_keys_str_mv |
AT restenmason considerationswhendeployingcanopytemperaturetoselecthighyieldingwheatbreedinglinesunderdroughtandheatstress AT ravipsingh considerationswhendeployingcanopytemperaturetoselecthighyieldingwheatbreedinglinesunderdroughtandheatstress |
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