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    Significant progressive heterobeltiosis in banana crossbreeding

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    Journal Article (896.2Kb)
    Date
    2020
    Author
    Batte, M.
    Nyine, M.
    Uwimana, B.
    Swennen, R.
    Akech, V.
    Brown, A.
    Hovmalm, H.P.
    Geleta, M.
    Ortiz, R.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Background Heterobeltiosis is the phenomenon when the hybrid’s performance is superior to its best performing parent. Banana (Musa spp. AAA) breeding is a tedious, time-consuming process, taking up to two decades to develop a consumer acceptable hybrid. Exploiting heterobeltiosis in banana breeding will help to select breeding material with high complementarity, thus increasing banana breeding efficiency. The aim of this study was therefore to determine and document the level of heterobeltiosis of bunch weight and plant stature in the East African highland bananas, in order to identify potential parents that can be used to produce offspring with desired bunch weight and stature after a few crosses. Results This research found significant progressive heterobeltiosis in cross-bred ‘Matooke’ (highland cooking) banana hybrids, also known as NARITAs, when grown together across years with their parents and grandparents in Uganda. Most (all except 4) NARITAs exhibited positive heterobeltiosis for bunch weight, whereas slightly more than half of them had negative heterobeltiosis for stature. The secondary triploid NARITA 17 had the highest heterobeltiosis for bunch weight: 249% versus its ‘Matooke’ grandparent and 136% against its primary tetraploid parent. Broad sense heritability (across three cropping cycles) for yield potential and bunch weight were high (0.84 and 0.76 respectively), while that of plant stature was very low (0.0035). There was a positive significant correlation (P < 0.05) between grandparent heterobeltiosis for bunch weight and genetic distance between parents (r = 0.39, P = 0.036), bunch weight (r = 0.7, P < 0.001), plant stature (r = 0.38, P = 0.033) and yield potential (r = 0.59, P < 0.001). Grandparent heterobeltiosis for plant stature was significantly, but negatively, correlated to the genetic distance between parents (r = − 0.6, P < 0.001). Conclusions Such significant heterobeltiosis exhibited for bunch weight is to our knowledge the largest among main food crops. Since bananas are vegetatively propagated, the effect of heterobeltiosis is easily fixed in the hybrids and will not be lost over time after the release and further commercialization of these hybrids.
    https://dx.doi.org/10.1186/s12870-020-02667-y
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7163
    IITA Authors ORCID
    Michael Battehttps://orcid.org/0000-0002-6793-2967
    Moses Nyinehttps://orcid.org/0000-0002-8409-7588
    Brigitte Uwimanahttps://orcid.org/0000-0001-7460-9001
    Rony Swennenhttps://orcid.org/0000-0002-5258-9043
    Allen Brownhttps://orcid.org/0000-0002-4468-5932
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1186/s12870-020-02667-y
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Banana; Plant Breeding; Plant Production
    Agrovoc Terms
    Bananas; East Africa; Genetics; Musa
    Regions
    Africa; East Africa
    Countries
    Uganda
    Hubs
    Eastern Africa Hub
    Journals
    BMC Plant Biology
    Collections
    • Journal and Journal Articles5286
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