Chlorophyll Fluorescence and Drought Tolerance in a Mapping Population of Durum Wheat

This study was conducted to compare and estimate the genetic variability among durum wheat lines in response to drought according to their grain yields and physiological traits. The use of fluorescence parameters as drought selection criteria for durum wheat was investigated in a population of 249 r...

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Autores principales:	Larouk Chafia, Gabon Fatima, Kehel Zakaria, Djekoun Abdelhamid, Nachit Miloudi, Amri Ahmed
Formato:	article
Lenguaje:	EN
Publicado:	Sciendo 2021
Materias:	agriculture fluorescence chlorophyll content drought durum wheat yield Agriculture S
Acceso en línea:	https://doaj.org/article/1eda9f51639e4020b6bda66dee87c251
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spelling	oai:doaj.org-article:1eda9f51639e4020b6bda66dee87c2512021-12-05T14:11:06ZChlorophyll Fluorescence and Drought Tolerance in a Mapping Population of Durum Wheat2466-477410.2478/contagri-2021-0018https://doaj.org/article/1eda9f51639e4020b6bda66dee87c2512021-12-01T00:00:00Zhttps://doi.org/10.2478/contagri-2021-0018https://doaj.org/toc/2466-4774This study was conducted to compare and estimate the genetic variability among durum wheat lines in response to drought according to their grain yields and physiological traits. The use of fluorescence parameters as drought selection criteria for durum wheat was investigated in a population of 249 recombinant inbred lines (RILs) derived from a cross between two cultivars of durum wheat: ‘Svevo’ and ‘Kofa’. The durum wheat RILs considered were analyzed to determine the relationship between their grain yields and chlorophyll fluorescence parameters at the grain filling stage under drought stress (rainfed) and supplemental irrigation (irrigated) conditions during the 2004 and 2005 seasons at the ICARDA center. The results obtained show that the durum wheat line performance was influenced by drought stress, indicating significant differences between the grain yields and fluorescence parameters recorded under drought rainfed (RF) and irrigation (IR) conditions. Significant differences between the experimental groups of durum wheat RILs (P<0.05) were only recorded under drought conditions, with the exception of leaf water potential (Lwp). Under such conditions, nearly all the parameters examined were significantly increased in the high-yielding group (with the exception of the Que parameter), thus revealing the genetic variability of the durum wheat lines considered in response to drought stress. The potential quantum efficiency of photosystem II (Fv/Fm) was found to be positively associated with the grain yield parameter. The mean values of Fv/Fm in both the high- and low-yielding groups significantly dropped under drought stress (0.71 and 0.68, respectively) compared to the Fv/Fm values recorded under irrigated conditions (0.80 and 0.81). Under drought conditions, slopes were highly significant (P<0.001) nearly for all the fluorescence parameters examined (with the exception of CHLSPAD) compared to those recorded under irrigation conditions. It was concluded that chlorophyll content (SPAD), F0, Fm, Fv, Fv/Fm, Lwp, and Que could be used as additional indicators in screening wheat germplasm for drought tolerance.Larouk ChafiaGabon FatimaKehel ZakariaDjekoun AbdelhamidNachit MiloudiAmri AhmedSciendoarticleagriculturefluorescencechlorophyll contentdroughtdurum wheatyieldAgricultureSENContemporary Agriculture, Vol 70, Iss 3-4, Pp 123-134 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	agriculture fluorescence chlorophyll content drought durum wheat yield Agriculture S
spellingShingle	agriculture fluorescence chlorophyll content drought durum wheat yield Agriculture S Larouk Chafia Gabon Fatima Kehel Zakaria Djekoun Abdelhamid Nachit Miloudi Amri Ahmed Chlorophyll Fluorescence and Drought Tolerance in a Mapping Population of Durum Wheat
description	This study was conducted to compare and estimate the genetic variability among durum wheat lines in response to drought according to their grain yields and physiological traits. The use of fluorescence parameters as drought selection criteria for durum wheat was investigated in a population of 249 recombinant inbred lines (RILs) derived from a cross between two cultivars of durum wheat: ‘Svevo’ and ‘Kofa’. The durum wheat RILs considered were analyzed to determine the relationship between their grain yields and chlorophyll fluorescence parameters at the grain filling stage under drought stress (rainfed) and supplemental irrigation (irrigated) conditions during the 2004 and 2005 seasons at the ICARDA center. The results obtained show that the durum wheat line performance was influenced by drought stress, indicating significant differences between the grain yields and fluorescence parameters recorded under drought rainfed (RF) and irrigation (IR) conditions. Significant differences between the experimental groups of durum wheat RILs (P<0.05) were only recorded under drought conditions, with the exception of leaf water potential (Lwp). Under such conditions, nearly all the parameters examined were significantly increased in the high-yielding group (with the exception of the Que parameter), thus revealing the genetic variability of the durum wheat lines considered in response to drought stress. The potential quantum efficiency of photosystem II (Fv/Fm) was found to be positively associated with the grain yield parameter. The mean values of Fv/Fm in both the high- and low-yielding groups significantly dropped under drought stress (0.71 and 0.68, respectively) compared to the Fv/Fm values recorded under irrigated conditions (0.80 and 0.81). Under drought conditions, slopes were highly significant (P<0.001) nearly for all the fluorescence parameters examined (with the exception of CHLSPAD) compared to those recorded under irrigation conditions. It was concluded that chlorophyll content (SPAD), F0, Fm, Fv, Fv/Fm, Lwp, and Que could be used as additional indicators in screening wheat germplasm for drought tolerance.
format	article
author	Larouk Chafia Gabon Fatima Kehel Zakaria Djekoun Abdelhamid Nachit Miloudi Amri Ahmed
author_facet	Larouk Chafia Gabon Fatima Kehel Zakaria Djekoun Abdelhamid Nachit Miloudi Amri Ahmed
author_sort	Larouk Chafia
title	Chlorophyll Fluorescence and Drought Tolerance in a Mapping Population of Durum Wheat
title_short	Chlorophyll Fluorescence and Drought Tolerance in a Mapping Population of Durum Wheat
title_full	Chlorophyll Fluorescence and Drought Tolerance in a Mapping Population of Durum Wheat
title_fullStr	Chlorophyll Fluorescence and Drought Tolerance in a Mapping Population of Durum Wheat
title_full_unstemmed	Chlorophyll Fluorescence and Drought Tolerance in a Mapping Population of Durum Wheat
title_sort	chlorophyll fluorescence and drought tolerance in a mapping population of durum wheat
publisher	Sciendo
publishDate	2021
url	https://doaj.org/article/1eda9f51639e4020b6bda66dee87c251
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Chlorophyll Fluorescence and Drought Tolerance in a Mapping Population of Durum Wheat

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