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    Biometric Analyses of the Inheritance of Resistance to Didymella rabiei in Chickpea

    Access Status
    Fulltext not available
    Authors
    Lichtenzveig, Judith
    Shtienberg, D.
    Zhang, H.
    Bonfil, D.
    Abbo, S.
    Date
    2002
    Type
    Journal Article
    
    Metadata
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    Citation
    Lichtenzveig, J. and Shtienberg, D. and Zhang, H.B. and Bonfil, D.J. and Abbo, S. 2002. Biometric Analyses of the Inheritance of Resistance to Didymella rabiei in Chickpea. Phytopathology. 92 (4): pp. 417-423.
    Source Title
    Phytopathology
    ISSN
    0031-949X
    School
    Department of Environment and Agriculture
    Remarks

    Copyright © 2002 American Phytopathological Society

    URI
    http://hdl.handle.net/20.500.11937/6279
    Collection
    • Curtin Research Publications
    Abstract

    Historically, the response of chickpea (Cicer arietinum L.) to Didymella rabiei (causal agent of Ascochyta blight) has been mainly related to as complete resistance and it was commonly assayed with qualitative (nonparametric) scales. Two reciprocal populations, derived from intra-specific crosses between a moderately resistant late flowering Israeli cultivar and a highly susceptible early flowering Indian accession, were tested at F3 and F4 generations in 1998 and 1999, respectively. A quantitative (parametric) assessment (percent disease severity) was used to evaluate the chickpea field response to Ascochyta blight. The transformed relative area under the disease progress curve (tRAUDPC) was calculated for each experimental unit for further analyses. Heritability estimates of the tRAUDPC were relatively high (0.67 to 0.85) in both generations for both reciprocal populations. The frequency distributions of tRAUDPC of the populations were continuous and significantly departed from normality (Shapiro-Wilk W test; P of W < 0.0001), being all platykurtic and skewed toward either the resistant or the susceptible parental lines. The presence of major genes was examined by testing the relationship between the F3 and F4 family means and the within family variances (Fain’s test). Analyses of these relationships suggested that segregation of a single (or few) quantitative trait locus with major effect and possibly other minor loci was the predominant mode of inheritance. The correlation estimates between the resistance and days to flower (r = –0.19 to –0.44) were negative and significantly (P = 0.054 to 0.001) different from zero, which represents a breeding constraint in the development of early flowering cultivars with Ascochyta blight resistance.

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