Mapping of QTL for aluminum tolerance in tropical maize

The objectives of this study were to map genomic regions associated with QTL for aluminum (Al) tolerance in maize and determine the phenotypic effects of tolerance loci. QTL analysis for Al tolerance was carried out in a population of F2:3 progenies resulting from a cross between the contrasting lin...

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Bibliographic Details
Published in:Crop breeding and applied biotechnology 2019-01, Vol.19 (1), p.86-94
Main Authors: Coelho, Caroline de Jesus, Gardingo, José Raulindo, Almeida, Mara Cristina de, Matiello, Rodrigo Rodrigues
Format: Article
Language:English
Subjects:
AGRONOMY
Aluminum
Amplified fragment length polymorphism
BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Chromosomes
Corn
Gene mapping
Loci
Mapping
Phenotypic variations
Pollution tolerance
Polymorphism
Quantitative trait loci
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Summary:The objectives of this study were to map genomic regions associated with QTL for aluminum (Al) tolerance in maize and determine the phenotypic effects of tolerance loci. QTL analysis for Al tolerance was carried out in a population of F2:3 progenies resulting from a cross between the contrasting lines LT 99-4 and LS 04-2. SSR (Simple Sequence Repeat) loci and AFLP (Amplified Fragment Length Polymorphism) were used to construct the linkage map and to detect QTL mapped by composite interval mapping analysis. Nine tolerance QTL among eight linkage groups (chromosomes 2, 4, 5, 6, 7, 8, 9, and 10) were mapped, which explained 70.3% of the phenotypic variance. The results confirmed three major QTL (bins 6.00, 8.05, and 10.01) that are described in the literature for Al tolerance, which accounted for most of the phenotypic variance (40.3%).
ISSN:1518-7853
1984-7033
1984-7033
DOI:10.1590/1984-70332019v19n1a12