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    Ten year progression of Musa breeding from 1987 to 1997: 1. Pollination success and seed production (Fecundity) patterns among multiple ploidy crosses

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    Journal Article (993.1Kb)
    Date
    2020
    Author
    Wilson, V.
    Tenkouano, A.
    Wilson, G.F.
    Swennen, R.
    Vuylsteke, D.
    Ortiz, R.
    Crouch, J.H.
    Crouch, H.K.
    Gauhl, F.
    Pasberg-Gauhl, C.
    Austin, P.D.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Aims: To create genetic variability, produce seeds and ultimately develop disease resistant and agronomically desirable hybrids with good organoleptic quality bunches. Study Design: Multiple hand pollinations/ crosses in possible combinations of 2x, 3x and 4x as maternal/ seed and paternal/ pollen parents. Place and Duration of Study: International Institute of Tropical Agriculture High Rainfall Station (IITA), Onne, Rivers State, Nigeria. 1987 to 1997. Methodology: Utilizing over 320 landraces, varieties, cultivars, clones/ genotypes and IITA accessions obtained from plantain and banana growing regions worldwide, scientists performed numerous hand pollinations/ crosses in possible combinations of 2x, 3x and 4x as maternal/ seed and paternal/ pollen parents every day. Results: There were significant differences (P=.05) in number of seeds produced when diploids were used as maternal parents. Overall, 2x-2x produced 11times more seeds than the 2x-3x, and 54times more seeds than the 2x-4x. The 2x-2x crosses had double seed production maxima when crosses took place in June and July (8,300 seeds) and August and November (6,200 seeds) indicating a high level of fecundity. Only 2x-2x showed significantly positive correlation between seed production and pollination success (r = 0.617*). When triploids were maternal parents, there were significant differences (P=.05) in number of seeds produced. On average, 3x-2x produced 4times the number of seeds obtained from 3x-3x and 27times more than 3x-4x crosses. Seed production from triploids was 32times less than from diploids. The 3x-3x exhibited positively significant correlation between seed production and pollination success (r = 0.595*). With tetraploid maternal parents, there was significant difference (P=.05) in seed production when the male parent was diploid. High seed production (3,000-4,000) was achieved when pollination took place from June to October in the 4x-2x crosses. Seed production and pollination success in the 4x-2x were positively and highly significantly correlated (r = 0.865**). Conclusion: In all crosses, diploid males produced the most seeds and pollination success increased as ploidy of maternal parent increased from diploid to tetraploid especially with diploid males.
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7037
    IITA Authors ORCID
    Rony Swennenhttps://orcid.org/0000-0002-5258-9043
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Cassava; Genetic Improvement; Plant Breeding; Plant Production; Plantain
    Agrovoc Terms
    Genetic Improvement; Genomes; Ploidy; Musa; Plant Breeding; Plant Production; Pollination
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Eastern Africa Hub
    Journals
    Asian Journal of Research in Botany
    Collections
    • Journal and Journal Articles4835
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