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    Ploidy manipulations and genetic markers as tools for analysis of quantitative trait variation in progeny derived from triploid plantains

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    S97ArtOrtizPloidyInthomNodev.pdf (496.4Kb)
    Date
    1997
    Author
    Ortiz, R.
    Craenen, K.
    Vuylsteke, D.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Plantains (Musa spp. AAB group) are starchy bananas widely grown in Africa and tropical America by small landholders. Genetic analysis of the plantain genome is difficult due to its triploidy and high sterility. Ploidy manipulations (scaling up and down the number of chromosomes) and interspecific plantain‐banana hybridization opened the path for the genetic amelioration of the crop and for the investigation of its genome for further manipulations. This report shows the associated effects of ploidy and of the major loci controlling vegetative fruit parthenocarpy and resistance to black sigatoka fungal leaf spot on growth and yield characteristics of plantain‐banana euploid hybrids. The number of copies of the black sigatoka resistance allele (bs1) and of the fruit parthenocarpy gene (P1) in addition to their intralocus interaction and ploidy level were all found to significantly affect bunch and fruit characteristics in euploid plantain‐banana hybrids. Epistasis significantly affected fruit weight and size in one cross but not in another. Significant multiple regression models combining ploidy and genetic markers explained 15 % to 85 % of quantitative trait variation (QTV). The amount of QTV accounted by ploidy and genetic markers varied according to the characteristic and cross in which the markers were examined.
    https://doi.org/10.1111/j.1601-5223.1997.00255.x
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/3957
    Digital Object Identifier (DOI)
    https://doi.org/10.1111/j.1601-5223.1997.00255.x
    IITA Subjects
    Plant Breeding; Plant Genetic Resources; Plant Production; Plant Diseases; Pests Of Plants; Farm Management; Disease Control; Plant Production; Genetic Improvement
    Agrovoc Terms
    Phenotypic Expression; Genomes; Parthenocarpy; Ploidy; Genetic Markers; Black Sigatoka
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4839
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