Knowledge Center Catalog

Genetic analysis of Fusarium head blight resistance using wheat doubled haploids

By: Contributor(s): Material type: TextTextPublication details: Mexico, DF (Mexico) CIMMYT : 1997ISBN:
  • 968-6923-94-2
Subject(s): DDC classification:
  • 632.4 DUB
Summary: The genetic constitution of fusarium head blight (FHB, scab) resistance of the Chinese bread wheat cultivar Sumai 3 was investigated using doubled haploid (DH) lines and recombinant inbred (RI) lines. Molecular markers were screened to identify genomic regions of quantitative trait loci (QTLs) for FHB resistance. Frequency distributions of DH lines developed from two F1 crosses between Sumai 3 (highly resistant to resistant, VR-R) and Gamenya (highly susceptible, VS), and Sumai 3 and Emblem (VS), closely fitted the FHB response of a l R:2M:l S segregation ratio. It is suggested that the FHB resistance of Sumai 3 is governed by two major genes with additive effects. One of the resistance genes was observed to be linked to a suppression gene for awnedness, and produced recombination values of 14.77+3.26% and 20.69+4.20%, respectively. Saikai 165 is a line with improved resistance derived from the cross Sumai 3 x Asakaze-komugi (resistant to moderately resistant, R-MR). From data of RI lines derived from Emblem x Saikai 165, three resistance genes were found to exist in Saikai 165. Four random amplified polymorphic DNA (RAPD) markers from two linkage groups were associated with FHB resistance in DH lines from the cross Fukuho- komugi (moderately susceptible, MS) x Oligo Culm (VS). Three were associated with the latent susceptible modifier of Fukuho-komugi.
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Item type Current library Collection Call number Copy number Status Date due Barcode Item holds
Conference proceedings CIMMYT Knowledge Center: John Woolston Library CIMMYT Publications Collection 632.4 DUB (Browse shelf(Opens below)) 1 Available L624324
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The genetic constitution of fusarium head blight (FHB, scab) resistance of the Chinese bread wheat cultivar Sumai 3 was investigated using doubled haploid (DH) lines and recombinant inbred (RI) lines. Molecular markers were screened to identify genomic regions of quantitative trait loci (QTLs) for FHB resistance. Frequency distributions of DH lines developed from two F1 crosses between Sumai 3 (highly resistant to resistant, VR-R) and Gamenya (highly susceptible, VS), and Sumai 3 and Emblem (VS), closely fitted the FHB response of a l R:2M:l S segregation ratio. It is suggested that the FHB resistance of Sumai 3 is governed by two major genes with additive effects. One of the resistance genes was observed to be linked to a suppression gene for awnedness, and produced recombination values of 14.77+3.26% and 20.69+4.20%, respectively. Saikai 165 is a line with improved resistance derived from the cross Sumai 3 x Asakaze-komugi (resistant to moderately resistant, R-MR). From data of RI lines derived from Emblem x Saikai 165, three resistance genes were found to exist in Saikai 165. Four random amplified polymorphic DNA (RAPD) markers from two linkage groups were associated with FHB resistance in DH lines from the cross Fukuho- komugi (moderately susceptible, MS) x Oligo Culm (VS). Three were associated with the latent susceptible modifier of Fukuho-komugi.

English

9806|AGRIS 9802

Jose Juan Caballero

CIMMYT Publications Collection


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