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    Agronomic qualities of genetic pyramids of common bean developed for multiple-disease-resistance

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    Authors
    Okii, D.
    Tukamuhabwa, P.
    Tusiime, G.
    Talwana, H.
    Odong, T.
    Mukankusi, Clare M.
    Male, A.
    Amongi, Winnyfred
    Sebuliba, Sulaiman
    Paparu, P.
    Nkalubo, Stanley T.
    Ugen, Michael A.
    Buah, S.S.J.
    Gepts, Paul L.
    Date
    2017
    Language
    en
    Type
    Journal Article
    Review status
    Peer Review
    Accessibility
    Open Access
    Metadata
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    Citation
    Okii, D.; Tukamuhabwa, P.; Tusiime, G.; Talwana, H.; Odong, T.; Mukankusi, Clare; Male, A.; Amongi, Winnyfred; Sebuliba, Sulaiman; Paparu, P.; Nkalubo, S.; Ugen, M.; Buah, S.; GEPTS, P.. 2017. Agronomic qualities of genetic pyramids of common bean developed for multiple-disease-resistance . African Crop Science Journal . African Crop Science Society, 25(4): 457-472.
    Permanent link to cite or share this item: https://hdl.handle.net/10568/89550
    DOI: http://dx.doi.org/10.4314/acsj.v25i4.5
    Abstract/Description
    Multiple co-infections by different pathogens on common bean (Phaseolus vulgaris L.) affect its productivity and cause complete crop loss in susceptible varieties. Therefore, gene pyramiding using marker assisted selection (MAS) and backcrossing, provide alternative cost-effective control measures to bean diseases. However, in the process of developing pyramids, linkage drags were likely to affect the qualities of progeny lines, hence, special attention was paid to this situation. The objective of this study was thus to assess the agronomic qualities of advanced genetic pyramids developed from a four-way cross for multiple disease resistance. The disease resistance genes (R) pyramided from four parents were: Co42 and Co-5 from G2333; Phg-2 from MEX54; Pythium ultimum Dennis from MLB49-89A and I & bc3 from MCM5001. The progeny lines were planted in an incomplete block design, and replicated thrice for two seasons (2015A and 2015B) in fields at CIAT, Kawanda in Uganda. Agronomic traits were highly heritable (0.6), except number of pods per plant (< 0.3). Backcrossing generated high-yielding bean lines, with 270 - 290 seed per plant and early maturity (95-100 days). Nine superior lines with desirable qualities, such as earliness (95 days), high seed rate (290 seeds per plant), and climbing ability, were obtained. Pyramiding R genes did not affect yield traits, except time to flowering and number of flower buds per plant due to transgressive segregation.
    CGIAR Author ORCID iDs
    Clare Mukankusihttps://orcid.org/0000-0001-7837-4545
    AGROVOC Keywords
    BACKCROSSING; PHASEOLOS VULGARIS L.; PLANT DISEASES; DISEASE RESISTANCE; YIELD; ELECTROPHORESIS; SEGREGATION; HERITABILITY; RETROCRUZAMIENTO; ENFERMEDADES DE LAS PLANTAS; RESISTENCIA A LA ENFERMEDAD; ELECTROFORESIS; SEGREGACIÓN; HEREDABILIDAD
    Subjects
    BEANS; PESTS AND DISEASES;
    Countries
    UGANDA
    Regions
    AFRICA; EAST AFRICA
    Collections
    • PABRA Journal Articles [38]
    • CIAT Agrobiodiversity [554]
    • CIAT Articles in Journals [2395]

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