Assessment of durum wheat (Triticum durum Desf.) genotypes based on their agro-physiological characteristics and stress tolerance indices

<p>The present study aimed to investigate the extent of variability and relationships between grain yield and morpho-physiological durum wheat traits. Sufficient variability was observed for most characters. Based on stress indices, either widely or specifically, adapted lines were identified....

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Autores principales:	Radhia MEKAOUSSI, Abou-bakr RABTI, Zine El Abidine FELLAHI, Abderrahmane HANNACHI, Amar BENMAHAMMED, Hamenna BOUZERZOUR
Formato:	article
Lenguaje:	EN SL
Publicado:	University of Ljubljana, Biotechnical Faculty 2021
Materias:	durum wheat grain yield genotype x environment interaction physiological traits tolerance indices path analysis cluster Agriculture S
Acceso en línea:	https://doaj.org/article/1203e35c45424dafa01979e484347c3a
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spelling	oai:doaj.org-article:1203e35c45424dafa01979e484347c3a2021-11-10T09:25:10ZAssessment of durum wheat (Triticum durum Desf.) genotypes based on their agro-physiological characteristics and stress tolerance indices1581-91751854-194110.14720/aas.2021.117.2.2021https://doaj.org/article/1203e35c45424dafa01979e484347c3a2021-07-01T00:00:00Zhttp://ojs.aas.bf.uni-lj.si/index.php/AAS/article/view/2021https://doaj.org/toc/1581-9175https://doaj.org/toc/1854-1941<p>The present study aimed to investigate the extent of variability and relationships between grain yield and morpho-physiological durum wheat traits. Sufficient variability was observed for most characters. Based on stress indices, either widely or specifically, adapted lines were identified. Path analysis pointed out to above ground biomass, harvest index, spike fertility and spike number as yield determinants, suggesting that these traits are of interest in the breeding program. The measured traits were classified within 6 principal components accounting for 79.45 % of the total variation. Breeding lines dispersed along first principal component exhibited substantial differences in performance and stress tolerance abilities. Cluster C3 lines were high yielding and stress tolerant. From this cluster, lines L24 and L14 were scored as the best for 7 and 5 traits out of 17 characters, respectively. Both lines are proposed for release and as parents in crosses to take advantage of their desirable characteristics. The results indicated that physiological traits were unrelated to each other and to morphological traits making difficult the concomitant selection for yield and stress tolerance driven by these traits. Complexes crosses, between parents carefully chosen for these specific characteristics, are necessary to enhance favorable genetic linkage and to generate new basic segregating populations with high genetic variability for these traits.</p>Radhia MEKAOUSSIAbou-bakr RABTIZine El Abidine FELLAHIAbderrahmane HANNACHIAmar BENMAHAMMEDHamenna BOUZERZOURUniversity of Ljubljana, Biotechnical Facultyarticledurum wheatgrain yieldgenotype x environment interactionphysiological traitstolerance indicespath analysisclusterAgricultureSENSLActa Agriculturae Slovenica, Vol 117, Iss 2, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN SL
topic	durum wheat grain yield genotype x environment interaction physiological traits tolerance indices path analysis cluster Agriculture S
spellingShingle	durum wheat grain yield genotype x environment interaction physiological traits tolerance indices path analysis cluster Agriculture S Radhia MEKAOUSSI Abou-bakr RABTI Zine El Abidine FELLAHI Abderrahmane HANNACHI Amar BENMAHAMMED Hamenna BOUZERZOUR Assessment of durum wheat (Triticum durum Desf.) genotypes based on their agro-physiological characteristics and stress tolerance indices
description	<p>The present study aimed to investigate the extent of variability and relationships between grain yield and morpho-physiological durum wheat traits. Sufficient variability was observed for most characters. Based on stress indices, either widely or specifically, adapted lines were identified. Path analysis pointed out to above ground biomass, harvest index, spike fertility and spike number as yield determinants, suggesting that these traits are of interest in the breeding program. The measured traits were classified within 6 principal components accounting for 79.45 % of the total variation. Breeding lines dispersed along first principal component exhibited substantial differences in performance and stress tolerance abilities. Cluster C3 lines were high yielding and stress tolerant. From this cluster, lines L24 and L14 were scored as the best for 7 and 5 traits out of 17 characters, respectively. Both lines are proposed for release and as parents in crosses to take advantage of their desirable characteristics. The results indicated that physiological traits were unrelated to each other and to morphological traits making difficult the concomitant selection for yield and stress tolerance driven by these traits. Complexes crosses, between parents carefully chosen for these specific characteristics, are necessary to enhance favorable genetic linkage and to generate new basic segregating populations with high genetic variability for these traits.</p>
format	article
author	Radhia MEKAOUSSI Abou-bakr RABTI Zine El Abidine FELLAHI Abderrahmane HANNACHI Amar BENMAHAMMED Hamenna BOUZERZOUR
author_facet	Radhia MEKAOUSSI Abou-bakr RABTI Zine El Abidine FELLAHI Abderrahmane HANNACHI Amar BENMAHAMMED Hamenna BOUZERZOUR
author_sort	Radhia MEKAOUSSI
title	Assessment of durum wheat (Triticum durum Desf.) genotypes based on their agro-physiological characteristics and stress tolerance indices
title_short	Assessment of durum wheat (Triticum durum Desf.) genotypes based on their agro-physiological characteristics and stress tolerance indices
title_full	Assessment of durum wheat (Triticum durum Desf.) genotypes based on their agro-physiological characteristics and stress tolerance indices
title_fullStr	Assessment of durum wheat (Triticum durum Desf.) genotypes based on their agro-physiological characteristics and stress tolerance indices
title_full_unstemmed	Assessment of durum wheat (Triticum durum Desf.) genotypes based on their agro-physiological characteristics and stress tolerance indices
title_sort	assessment of durum wheat (triticum durum desf.) genotypes based on their agro-physiological characteristics and stress tolerance indices
publisher	University of Ljubljana, Biotechnical Faculty
publishDate	2021
url	https://doaj.org/article/1203e35c45424dafa01979e484347c3a
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Assessment of durum wheat (Triticum durum Desf.) genotypes based on their agro-physiological characteristics and stress tolerance indices

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