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    Simple sequence repeat-based mini-core collection for white Guinea yam (Dioscorea rotundata) germplasm

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    Journal Article (937.3Kb)
    Date
    2021
    Author
    Pachakkil, B.
    Yamanaka, S.
    Girma Tessema, G.
    Matsumoto, R.
    Tamiru-Oli, M.
    Bhattacharjee, R.
    Abberton, M.
    Muranaka, S.
    Asiedu, R.
    Terauchi, R.
    Takagi, H.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    A core subset with a small number of accessions representing the genetic diversity of the base collection plays a vital role in facilitating efficient utilization of plant genetic resources. This is particularly relevant for vegetatively propagated large plant size tuber crops with a long growing period, such as white Guinea yam (Dioscorea rotundata Poir.). For the efficient utilization of D. rotundata genetic resources, this study was aimed at developing a mini‐core collection from a core collection of 447 D. rotundata accessions maintained at the International Institute of Tropical Agriculture (IITA). Accordingly, a D. rotundata mini‐core collection representing 102 accessions was selected using 16 simple sequence repeat (SSR) markers, retaining ∼98% of the SSR allelic diversity of the base collection. A similar level of diversity was captured within the mini‐core collection and the base collection with respect to 21 morphological traits, ploidy level, and geographic origin. The mini‐core collection demonstrated a wide range of variation in agronomic traits such as growth period, number of tubers, average tuber weight, and total yield per plant. This variation was considerable when compared with the variation observed for the same traits among the 10 lines or genotypes conventionally used in the breeding program at IITA, which were included in this study as checks. The selected mini‐core accessions could serve as a working collection to broaden the genetic variation for use in practical breeding programs, as well as in future genomic analyses aimed at the genetic improvement of D. rotundata in West Africa.
    https://dx.doi.org/10.1002/csc2.20431
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7047
    IITA Authors ORCID
    Ryo Matsumotohttps://orcid.org/0000-0002-0106-6728
    Ranjana Bhattacharjeehttps://orcid.org/0000-0002-5184-5930
    Michael Abbertonhttps://orcid.org/0000-0003-2555-9591
    Robert Asieduhttps://orcid.org/0000-0001-8943-2376
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1002/csc2.20431
    Research Themes
    Biotech and Plant Breeding; Plant Production and Health
    IITA Subjects
    Agronomy; Food Security; Genetic Improvement; Plant Breeding; Plant Genetic Resources; Plant Production; Yam
    Agrovoc Terms
    Dioscorea Rotundata; Yams; Sequence Experiments; Plant Genetic Resources; Food Security; Genotypes; West Africa; Germplasm
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    Crop Science
    Collections
    • Journal and Journal Articles4842
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