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    KASPar SNP genetic map of cassava for QTL discovery of productivity traits in moderate drought stress environment in Africa

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    Journal Article (1.217Mb)
    Date
    2021
    Author
    Ewa, F.*
    Asiwe, J.A.N.
    Okogbenin, E.
    Ogbonna, A.C.
    Egesi, C.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Cassava is an important staple in Sub-Sahara Africa. While its production has rapidly expanded to the dry savannahs of the continent, productivity is low in this ecology due to drought by farmers, extending the growth cycle from 12 months to 18, and sometimes 24 months to ensure better harvests. Yield is a complex trait and often difficult to manipulate for genetic gain in conventional breeding. Unfortunately, the dearth of molecular tools for decades has hampered molecular breeding (MB) to improve cassava productivity. This study was conducted to explore KASpar SNPs to generate more molecular tools to enhance genetic dissection of elite African germplasm for improved cassava productivity in dry environments of Africa where molecular resources are highly limited for crop improvement. To aid molecular genetic analysis of traits, a linkage map covering 1582.8 cM with an average resolution of 3.69 cM was constructed using 505 polymorphic SNP markers distributed over 21 linkage groups. Composite interval mapping using 267 F1 progeny in initial QTL mapping identified 27 QTLs for productivity traits in the dry savannah of Nigeria. The availability of KASPar SNPs are anticipated to improve the implementation of MB for the development of high performing drought-tolerant cassava varieties in Africa.
    https://dx.doi.org/10.1038/s41598-021-90131-8
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7153
    IITA Authors ORCID
    Chiedozie Egesihttps://orcid.org/0000-0002-9063-2727
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1038/s41598-021-90131-8
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Cassava; Food Security; Plant Breeding; Plant Production
    Agrovoc Terms
    Cassava; Starch; Phenotypes; Genotypes; Quantitative Trait Loci; Breeding; Subsaharan Africa
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Eastern Africa Hub; Headquarters and Western Africa Hub
    Journals
    Scientific Reports
    Collections
    • Journal and Journal Articles4943
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