Quantitative inheritance of resistance to Septoria tritici blotch in durum wheat in Tunisia

Septoria tritici blotch, causal agent Mycosphaerella graminicola (Fuckel) J. Schrot. (anamorph: Zymoseptoria tritici Desm.), is the major foliar disease of wheat (Triticum aestivum L.) in Tunisia causing frequent epidemics on T. turgidum L. var. durum (Desf.) Bowden, and important yield and grain qu...

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Autores principales:	Berraies,Samia, Ammar,Karim, Salah Gharbi,Mohamed, Yahyaoui,Amor, Rezgui,Salah
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2014
Materias:	Inheritance quantitative resistance recombinant inbred line population Triticum durum Zymoseptoria tritici
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392014000100006
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spelling	oai:scielo:S0718-583920140001000062018-10-01Quantitative inheritance of resistance to Septoria tritici blotch in durum wheat in TunisiaBerraies,SamiaAmmar,KarimSalah Gharbi,MohamedYahyaoui,AmorRezgui,Salah Inheritance quantitative resistance recombinant inbred line population Triticum durum Zymoseptoria tritici Septoria tritici blotch, causal agent Mycosphaerella graminicola (Fuckel) J. Schrot. (anamorph: Zymoseptoria tritici Desm.), is the major foliar disease of wheat (Triticum aestivum L.) in Tunisia causing frequent epidemics on T. turgidum L. var. durum (Desf.) Bowden, and important yield and grain quality losses. To determine the inheritance of resistance to septoria, a cross was made using resistant (’Salim’) and susceptible (’Karim’) cultivars. Parents, and the 149 derived recombinant lines, were tested for resistance to septoria under field conditions during the 2009 and 2010 crop seasons. The inheritance of resistance to septoria was quantitative where a continuous and normal distribution (W = 0.93) was shown among segregate progenies. During 2009 and 2010 crop seasons, the mean disease severities of recombinant inbred lines (RILs) ranged from 29.1% to 41.8%, respectively, and 53% of RILs were associated with lower disease severity than the mid-parent value. The severity was significantly affected by Genotype x Year interaction (p < 0.01). Broad sense heritability was 0.55 suggesting a quantitative inheritance of resistance to M. graminicola. These results would imply that genetic resistance to STB could be attributed to additive gene effects. Thus, using identified sources of tolerance to STB in a breeding program would enhance the development of cultivars that are adapted to the prevailing isolates in field conditions.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.74 n.1 20142014-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392014000100006en10.4067/S0718-58392014000100006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Inheritance quantitative resistance recombinant inbred line population Triticum durum Zymoseptoria tritici
spellingShingle	Inheritance quantitative resistance recombinant inbred line population Triticum durum Zymoseptoria tritici Berraies,Samia Ammar,Karim Salah Gharbi,Mohamed Yahyaoui,Amor Rezgui,Salah Quantitative inheritance of resistance to Septoria tritici blotch in durum wheat in Tunisia
description	Septoria tritici blotch, causal agent Mycosphaerella graminicola (Fuckel) J. Schrot. (anamorph: Zymoseptoria tritici Desm.), is the major foliar disease of wheat (Triticum aestivum L.) in Tunisia causing frequent epidemics on T. turgidum L. var. durum (Desf.) Bowden, and important yield and grain quality losses. To determine the inheritance of resistance to septoria, a cross was made using resistant (’Salim’) and susceptible (’Karim’) cultivars. Parents, and the 149 derived recombinant lines, were tested for resistance to septoria under field conditions during the 2009 and 2010 crop seasons. The inheritance of resistance to septoria was quantitative where a continuous and normal distribution (W = 0.93) was shown among segregate progenies. During 2009 and 2010 crop seasons, the mean disease severities of recombinant inbred lines (RILs) ranged from 29.1% to 41.8%, respectively, and 53% of RILs were associated with lower disease severity than the mid-parent value. The severity was significantly affected by Genotype x Year interaction (p < 0.01). Broad sense heritability was 0.55 suggesting a quantitative inheritance of resistance to M. graminicola. These results would imply that genetic resistance to STB could be attributed to additive gene effects. Thus, using identified sources of tolerance to STB in a breeding program would enhance the development of cultivars that are adapted to the prevailing isolates in field conditions.
author	Berraies,Samia Ammar,Karim Salah Gharbi,Mohamed Yahyaoui,Amor Rezgui,Salah
author_facet	Berraies,Samia Ammar,Karim Salah Gharbi,Mohamed Yahyaoui,Amor Rezgui,Salah
author_sort	Berraies,Samia
title	Quantitative inheritance of resistance to Septoria tritici blotch in durum wheat in Tunisia
title_short	Quantitative inheritance of resistance to Septoria tritici blotch in durum wheat in Tunisia
title_full	Quantitative inheritance of resistance to Septoria tritici blotch in durum wheat in Tunisia
title_fullStr	Quantitative inheritance of resistance to Septoria tritici blotch in durum wheat in Tunisia
title_full_unstemmed	Quantitative inheritance of resistance to Septoria tritici blotch in durum wheat in Tunisia
title_sort	quantitative inheritance of resistance to septoria tritici blotch in durum wheat in tunisia
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392014000100006
work_keys_str_mv	AT berraiessamia quantitativeinheritanceofresistancetoseptoriatriticiblotchindurumwheatintunisia AT ammarkarim quantitativeinheritanceofresistancetoseptoriatriticiblotchindurumwheatintunisia AT salahgharbimohamed quantitativeinheritanceofresistancetoseptoriatriticiblotchindurumwheatintunisia AT yahyaouiamor quantitativeinheritanceofresistancetoseptoriatriticiblotchindurumwheatintunisia AT rezguisalah quantitativeinheritanceofresistancetoseptoriatriticiblotchindurumwheatintunisia
_version_	1714205330945081344

Quantitative inheritance of resistance to Septoria tritici blotch in durum wheat in Tunisia

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