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    Genetic parameter estimation and selection in advanced breeding population of white Guinea yam

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    Journal Article (4.104Mb)
    Date
    2021
    Author
    Norman, P.E.
    Tongoona, P.B.
    Danquah, A.
    Danquah, E.Y.
    Agre, P.A.
    Agbona, A.
    Asiedu, R.
    Asfaw, A.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    White Guinea yam (Dioscorea rotundata Poir.) is an important tuber crop grown extensively in tropical regions of West African yam belt. Tuber yield, dry matter content, and tolerance to yam mosaic virus are key traits used for identification and selection of superior varieties for commercial deployment. In this study, we estimated genetic parameters for fresh tuber yield, tuber dry matter content, and quantitative field tolerance to yam mosaic virus in 49 clones grown in multi-environment trials (METs). We conducted genomic prediction involving 6337 single nucleotide polymorphisms (SNPs) and phenotypic field evaluation of data collected on the three traits from four sites. Additive genetic and non-genetic factors contributed significantly to phenotypic variation of studied yam traits in METs but to varying degrees. The non-genetic effects were relatively high for most of the measured traits. Narrow-sense heritability values were low (<0.30) for all studied traits. Further analysis of the performance of the clones at test sites with additive main effects and multiplicative interaction (AMMI) analysis exhibited significant genotype by environment interactions (GEI) for the three traits. The AMMI identified TDr10/00412, TDr11/00055, and TDr09/00135 clones with lowest mean trait stability index and outstanding performance for fresh tuber yield (t ha−1), tuber dry matter, and mosaic virus resistance across sites. The elite clones identified could serve as useful source of alleles for the genetic improvement of the crop and possibly considered for release to farmers.
    https://dx.doi.org/10.1080/15427528.2021.1881012
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7100
    IITA Authors ORCID
    Prince Emmanuel Normanhttps://orcid.org/0000-0002-0150-8610
    Paterne AGREhttps://orcid.org/0000-0003-1231-2530
    Robert Asieduhttps://orcid.org/0000-0001-8943-2376
    Asrat Asfawhttps://orcid.org/0000-0002-4859-0631
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1080/15427528.2021.1881012
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Food Security; Genetic Improvement; Plant Breeding; Plant Genetic Resources; Plant Production; Yam
    Agrovoc Terms
    Yams; Genotypes; Genotype Environment Interaction; Genetic Parameters; Phenotypes
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    Journal of Crop Improvement
    Collections
    • Journal and Journal Articles4835
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