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Analysis of the septoria monitoring nursery

By: Gilchrist, L | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico).
Contributor(s): Ginkel, M. van|McNab, A.|Krupinsky, J [eds.] | Velázquez, C [coaut.] | Crossa, J [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 1999ISBN: 970-648-035-8.Subject(s): Genotype environment interaction AGROVOC | Infection | Monitoring | Pathogens | Plant diseases | Septoria | CIMMYTDDC classification: 632.4 Summary: The Septoria Monitoring Nursery (SMN) was divided into two sections: 1) the best sources of resistance identified by CIMMYT and national agricultural research breeding programs (renewed every three years) and 2) a tentative group of differentials. The nursery included two susceptible durum varieties and a resistant one, as well as two susceptible bread wheat varieties and a resistant one. Readings of septoria leaf blotch were taken using the double digit modified scale, and analyses were done separately by digits. The variance component estimate and the F test for the first and the second digits were highly significant for site, as well as for the site x genotype interaction component for the 1 st and 2 nd SMN. An analysis of the group of tentative differentials across the seven years and all sites also gave significant differences between sites and between sites and genotypes. The contrast between durum and bread wheat for the 1 st SMN was not significant, which indicates that at least at those locations there were no host-specific pathogen populations. The contrast between durum and bread wheat was significant in the 2 nd SMN, indicating the existence of specific pathogen populations for each of the two crops in some sites.Collection: CIMMYT Publications Collection
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Item type Current location Collection Call number Copy number Status Date due Barcode Item holds
Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 632.4 GIN (Browse shelf) 1 Available P628903
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The Septoria Monitoring Nursery (SMN) was divided into two sections: 1) the best sources of resistance identified by CIMMYT and national agricultural research breeding programs (renewed every three years) and 2) a tentative group of differentials. The nursery included two susceptible durum varieties and a resistant one, as well as two susceptible bread wheat varieties and a resistant one. Readings of septoria leaf blotch were taken using the double digit modified scale, and analyses were done separately by digits. The variance component estimate and the F test for the first and the second digits were highly significant for site, as well as for the site x genotype interaction component for the 1 st and 2 nd SMN. An analysis of the group of tentative differentials across the seven years and all sites also gave significant differences between sites and between sites and genotypes. The contrast between durum and bread wheat for the 1 st SMN was not significant, which indicates that at least at those locations there were no host-specific pathogen populations. The contrast between durum and bread wheat was significant in the 2 nd SMN, indicating the existence of specific pathogen populations for each of the two crops in some sites.

Genetic Resources Program

English

9910|AGRIS 0001|R99-00CIMPU

Jose Juan Caballero

CCJL01

CIMMYT Publications Collection

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Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org