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Physiological and agronomical evaluation of elite rice varieties for adaptation to heat stress

BACKGROUND: The increasing temperatures due to climate change around the world poses a serious threat to sustainable crop production. The growing adverse effects of heat stress are putting global food security at great risk. Crop improvement for adaptation to increased temperatures is therefore of p...

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Autores principales: Ezin, Vincent, Ahanchede, Wassiou Worou, Ayenan, Mathieu Anatole Tele, Ahanchede, Adam
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9088053/
https://www.ncbi.nlm.nih.gov/pubmed/35534823
http://dx.doi.org/10.1186/s12870-022-03604-x
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author Ezin, Vincent
Ahanchede, Wassiou Worou
Ayenan, Mathieu Anatole Tele
Ahanchede, Adam
author_facet Ezin, Vincent
Ahanchede, Wassiou Worou
Ayenan, Mathieu Anatole Tele
Ahanchede, Adam
author_sort Ezin, Vincent
collection PubMed
description BACKGROUND: The increasing temperatures due to climate change around the world poses a serious threat to sustainable crop production. The growing adverse effects of heat stress are putting global food security at great risk. Crop improvement for adaptation to increased temperatures is therefore of paramount importance. This study aims at assessing the effects of heat stress in relation to agro-morphological and physiological traits of six rice varieties. The study was carried out in the Township of Glazoué, a rice-growing area in Benin. The experiments were laid in randomized complete block design with three replications. Two types of stress were imposed: high-temperature stress in the dry season and optimal temperatures in the rainy season. The calculated mean values of morphological, physiological, and agronomic traits were used to estimate heritability, genetic advance, PCA, and correlation. RESULTS: The results showed that heat stress had a significant (p ≤ 0.01) influence on plant height, leaf length, number of tillers, number of internodes, days to flowering, and days to maturity, 1000-seed weight, and yield per plant. The heat stress had significantly delayed the flowering of all the varieties when compared to the controls. The highest values of 1000-seed weight (34. 67 g) were recorded for BRIZ-8B while the lowest (25.33 g) were recorded for NERICA-L20. The highest values for the genotypic coefficient of variation (43.05%) and phenotypic coefficient of variation (99.13%) were recorded for yield per plant under heat stress. The topmost broad-sense heritability was recorded for grain width (92.72%), followed by days to maturity (69.33%), days to flowering (68.50%), number of grains per panicle (57.35%), and yield (54.55%). CONCLUSIONS: These results showed that BRIZ-8B and BRIZ-10B were the most tolerant to high temperature amongst the six varieties assessed and potentially could be recommended to farmers for production under high temperature and be used in breeding programs to improve heat tolerance in rice. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12870-022-03604-x.
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spelling pubmed-90880532022-05-11 Physiological and agronomical evaluation of elite rice varieties for adaptation to heat stress Ezin, Vincent Ahanchede, Wassiou Worou Ayenan, Mathieu Anatole Tele Ahanchede, Adam BMC Plant Biol Research BACKGROUND: The increasing temperatures due to climate change around the world poses a serious threat to sustainable crop production. The growing adverse effects of heat stress are putting global food security at great risk. Crop improvement for adaptation to increased temperatures is therefore of paramount importance. This study aims at assessing the effects of heat stress in relation to agro-morphological and physiological traits of six rice varieties. The study was carried out in the Township of Glazoué, a rice-growing area in Benin. The experiments were laid in randomized complete block design with three replications. Two types of stress were imposed: high-temperature stress in the dry season and optimal temperatures in the rainy season. The calculated mean values of morphological, physiological, and agronomic traits were used to estimate heritability, genetic advance, PCA, and correlation. RESULTS: The results showed that heat stress had a significant (p ≤ 0.01) influence on plant height, leaf length, number of tillers, number of internodes, days to flowering, and days to maturity, 1000-seed weight, and yield per plant. The heat stress had significantly delayed the flowering of all the varieties when compared to the controls. The highest values of 1000-seed weight (34. 67 g) were recorded for BRIZ-8B while the lowest (25.33 g) were recorded for NERICA-L20. The highest values for the genotypic coefficient of variation (43.05%) and phenotypic coefficient of variation (99.13%) were recorded for yield per plant under heat stress. The topmost broad-sense heritability was recorded for grain width (92.72%), followed by days to maturity (69.33%), days to flowering (68.50%), number of grains per panicle (57.35%), and yield (54.55%). CONCLUSIONS: These results showed that BRIZ-8B and BRIZ-10B were the most tolerant to high temperature amongst the six varieties assessed and potentially could be recommended to farmers for production under high temperature and be used in breeding programs to improve heat tolerance in rice. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12870-022-03604-x. BioMed Central 2022-05-10 /pmc/articles/PMC9088053/ /pubmed/35534823 http://dx.doi.org/10.1186/s12870-022-03604-x Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visithttp://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research
Ezin, Vincent
Ahanchede, Wassiou Worou
Ayenan, Mathieu Anatole Tele
Ahanchede, Adam
Physiological and agronomical evaluation of elite rice varieties for adaptation to heat stress
title Physiological and agronomical evaluation of elite rice varieties for adaptation to heat stress
title_full Physiological and agronomical evaluation of elite rice varieties for adaptation to heat stress
title_fullStr Physiological and agronomical evaluation of elite rice varieties for adaptation to heat stress
title_full_unstemmed Physiological and agronomical evaluation of elite rice varieties for adaptation to heat stress
title_short Physiological and agronomical evaluation of elite rice varieties for adaptation to heat stress
title_sort physiological and agronomical evaluation of elite rice varieties for adaptation to heat stress
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9088053/
https://www.ncbi.nlm.nih.gov/pubmed/35534823
http://dx.doi.org/10.1186/s12870-022-03604-x
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