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Genetic analysis of QTL for resistance to maize lethal necrosis in multiple mapping populations

Author: Awata, L.A.O.
Author: Beyene, Y.
Author: Gowda, M.
Author: Mahabaleswara, S.L.
Author: Jumbo, M.B.
Author: Tongoona, P.
Author: Danquah, E.
Author: Ifie, B.E.
Author: Marchelo-D’ragga, P.W.
Author: Olsen, M.
Author: Ogugo, V.
Author: Mugo, S.N.
Author: Prasanna, B.M.
Year: 2020
ISSN: 2073-4425 (Print)
Format: PDF
Language: English
Publisher: MDPI
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.
Type: Article
Place of Publication: Basel (Switzerland)
Issue: 1
Issue: art. 32
Volume: 11
DOI: 10.3390/genes11010032
Description: Maize lethal necrosis (MLN) occurs when maize chlorotic mottle virus (MCMV) and sugarcane mosaic virus (SCMV) co-infect maize plant. Yield loss of up to 100% can be experienced under severe infections. Identification and validation of genomic regions and their flanking markers can facilitate marker assisted breeding for resistance to MLN. To understand the status of previously identified quantitative trait loci (QTL)in diverse genetic background, F3 progenies derived from seven bi-parental populations were genotyped using 500 selected kompetitive allele specific PCR (KASP) SNPs. The F3 progenies were evaluated under artificial MLN inoculation for three seasons. Phenotypic analyses revealed significant variability (P ≤ 0.01) among genotypes for responses to MLN infections, with high heritability estimates (0.62 to 0.82) for MLN disease severity and AUDPC values. Linkage mapping and joint linkage association mapping revealed at least seven major QTL (qMLN3_130 and qMLN3_142, qMLN5_190 and qMLN5_202, qMLN6_85 and qMLN6_157 qMLN8_10 and qMLN9_142) spread across the 7-biparetal populations, for resistance to MLN infections and were consistent with those reported previously. The seven QTL appeared to be stable across genetic backgrounds and across environments. Therefore, these QTL could be useful for marker assisted breeding for resistance to MLN.
Agrovoc: MAIZE
Notes: The dataset related with this article is only referential
Related Datasets:
Journal: Genes

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  • Maize
    Maize breeding, phytopathology, entomology, physiology, quality, and biotech

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