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    Variability in agricultural and biological yields of ten musa genotypes evaluated for two cropping cycles in a subhumid environment of Nigeria

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    Date
    2008
    Author
    Baiyeri, K.P.
    Tenkouano, A.
    Type
    Journal Article
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    Abstract/Description
    The harvest index (HI), which is the ratio of the economic yield to the aboveground plant biomass, is an important trait to assess progress in improving yield potential. Therefore, a study was carried out to examine the assimilate partitioning of nine Musa hybrids along with a local check for two cropping cycles. Highly significant (P < 0.01) genotype effects were found for all the measured components of yield. Most hybrids displayed HI values that were twice as large as that of the local check, indicating a greater efficiency of hybrids in assimilate partitioning. Genotype-by-cropping cycle interaction for HI was significant, suggesting that resource availability during the two cropping cycles influenced assimilate-partitioning pattern. Correlation coefficients between bunch weight and plant biomass, and between bunch weight and number of fruits per bunch were positive, high and significant. Also, positive and high correlation coefficient was obtained between bunch weight and HI. Furthermore, path coefficient analysis revealed that the direct effects of plant biomass and HI were high; however, the direct effect of number of fruits per bunch was insignificant; rather, its contribution to bunch weight was through an indirect effect via plant biomass. The high direct effect of HI on bunch weight suggested that further yield increase in Musa germplasm is possible by selecting for high HI. But a low and non-significant relationship between plant biomass and HI suggested that increase in yield could be achieved without a proportional increase in biomass.
    https://dx.doi.org/10.1300/J411v21n01_03
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/2960
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1300/J411v21n01_03
    IITA Subjects
    Genetic Improvement; Pests Of Plants; Plant Breeding; Plant Diseases; Plant Genetic Resources; Food Security; Diseases Control; Farm Management; Plant Production
    Agrovoc Terms
    Sink-Source Relationship; Musa Hybrids; Yield; Harvest Index; Plant Biomass; Germplasm; Photo Assimilates; Genotypes
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4842
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