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    Seed set patterns in east African highland cooking bananas show asymmetric distribution in bunches and fruits

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    Journal Article (2.921Mb)
    Date
    2021
    Author
    Waniale, A.
    Swennen, R.
    Mukasa, S.
    Tugume, A.K.
    Kubiriba, J.
    Tushemereirwe, W.K.
    Batte, M.
    Brown, A.
    Tumuhimbise, R.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Low female fertility in bananas is the biggest hurdle for banana breeding. The aim of this study was to determine seed set patterns in East African Highland Cooking bananas (EAHBs) to inform future decisions on a more targeted approach of increasing seed set and subsequently banana-breeding efficiency. Matooke (AAA) and Mchare (AA) bananas are genetically distinct but belong to the same genetic complex, referred to as EAHBs. Seed set patterns in “Enzirabahima” (AAA), “Mshale” (AA), and “Nshonowa” (AA), all with residual fertility, were examined after hand pollination with a highly male fertile wild banana “Calcutta 4” (AA). Seed set in “Enzirabahima” is predominant in distal hands. Mchare cultivars have a slightly more even distribution of seeds in their hands compared to “Enzirabahima”. There is a gradual increase in seed set from proximal to distal hands with a slight drop in the last hand. This pattern is more definite in “Enzirabahima” and “Mshale”, while “Nshonowa” has a somewhat inconsistent pattern. There is also a drop in seed set per 100 fruits per hand from small to larger bunches. However, larger bunches have a higher pollination success compared to smaller bunches. They therefore set more seed on 100 fruits per hand and per bunch basis, if bunches without seed are accounted for. Pollination success rate increases from smaller to larger bunches of EAHBs. Seed set is biased toward the distal third part of fruits of examined EAHBs, as well as tetraploid Matooke hybrid “401K-1” (AAAA), and improved diploid “Zebrina” GF (AA) that were used for comparison. In comparison, in the highly female fertile “Calcutta 4”, seed set is along the entire length of the fruit. Seed set bias in the distal hands and distal end of fruits suggests a systematic mechanism rather than a random occurrence. It is expected that this information will provide a foundation for increased crossbreeding efficiency in bananas.
    Acknowledgements
    Ongoing studies on increasing seed set in banana (Matooke and Mchare) are part of the PhD study of the first author. We recognize Breeding Better Banana project which funded the studies on banana floral biology. The authors also thank all donors who supported this work through their contributions to the CGIAR Fund (http://www.cgiar.org/funders/ accessed on 14 August 2020), and in particular to the CGIAR Research Program for Roots, Tubers and Bananas (CRP-RTB).We further acknowledge editing advice ...
    https://dx.doi.org/10.3390/agronomy11040763
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7781
    IITA Authors ORCID
    Rony Swennenhttps://orcid.org/0000-0002-5258-9043
    Michael Battehttps://orcid.org/0000-0002-6793-2967
    Allen Brownhttps://orcid.org/0000-0002-4468-5932
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3390/agronomy11040763
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Banana; Plant Breeding; Plant Production
    Agrovoc Terms
    Fertility; Bananas; Musa; Pollination; Breeding; Uganda
    Regions
    Africa; East Africa
    Countries
    Uganda
    Hubs
    Eastern Africa Hub
    Journals
    Agronomy
    Collections
    • Journal and Journal Articles4835
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