Acessibilidade / Reportar erro
ARTICLE • Crop Breed. Appl. Biotechnol. 19 (01) • Jan-Mar 2019 • https://doi.org/10.1590/1984-70332019v19n1a12   copy

Mapping of QTL for aluminum tolerance in tropical maize

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

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%).

Keywords:
Tolerance loci; composite interval mapping; molecular markers; linkage map

Crop Breeding and Applied Biotechnology Universidade Federal de Viçosa, Departamento de Fitotecnia, 36570-000 Viçosa - Minas Gerais/Brasil, Tel.: (55 31)3899-2611, Fax: (55 31)3899-2611 - Viçosa - MG - Brazil
E-mail: cbab@ufv.br
Acompanhe os números deste periódico no seu leitor de RSS