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    Effects of in vitro polyploidization on agronomic characteristics and fruit carotenoid content; implications for banana genetic improvement

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    U19ArtAmahEffectsInthomDev.pdf (1.870Mb)
    Date
    2019-11-12
    Author
    Amah, D.
    van Biljon, A.
    Maziya-Dixon, B.
    Labuschagne, M.
    Swennen, R.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Bananas (Musa spp.), native to South East Asia, have spread worldwide and are integrated into the diets of millions of people in tropical regions. Carotenoid content varies dramatically between different banana genotypes, providing an opportunity for vitamin A biofortification. Polyploidization is a useful tool for crop improvement with potential to generate new diversity, especially in a polyploid crop like bananas. Ten induced tetraploids generated from six diploid banana genotypes were evaluated for their agronomic attributes and fruit carotenoid content in comparison to their diploid progenitors. Tetraploids had distinct plant morphology, but generally displayed inferior vegetative and yield characteristics with 20% lower bunch weights than their original diploids. Similarly, a 50% decrease in fruit provitamin A carotenoids (α-carotene, 13-cis β-carotene, 9-cis β-carotene, trans-β-carotene) accompanied by a corresponding increase in lutein was recorded in induced tetraploids in comparison to their original diploids. Additionally, all lines were subjected to pollen viability tests to assess their fertility. Pollen viability tests indicated over 70% viability for induced tetraploids and diploid controls, suggesting their possible use in crosses. These findings provide a basis for the application of induced polyploidization in bananas to generate useful genetic material for integration in hybridization programmes aiming to produce vitamin A enriched triploids valuable to malnourished populations.
    https://dx.doi.org/10.3389/fpls.2019.01450
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/6553
    Non-IITA Authors ORCID
    Delphine Amahhttps://orcid.org/0000-0002-5706-8773
    Rony Swennenhttps://orcid.org/0000-0002-5258-9043
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3389/fpls.2019.01450
    Research Themes
    BIOTECH & PLANT BREEDING; NUTRITION & HUMAN HEALTH
    IITA Subjects
    Banana; Genetic Improvement; Nutrition; Plant Breeding; Plant Genetic Resources
    Agrovoc Terms
    Bananas; Genetic Improvement; Carotenoids; Induced Polyploidy; Diploids; Retinol; Pollen; Viability
    Regions
    Asia; Southeast Asia
    Journals
    Frontiers in Plant Science
    Collections
    • Journal and Journal Articles4835
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