QTLs identification for characteristics of the root system in upland rice through DNA microarray
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Data
2016-10-01
Autores
Rios Terra, Thiago Gledson
Rodrigues, Haroldo Silva
Nakano Rangel, Paulo Hideo
Tomaz, Rafael Simoes [UNESP]
Cruz, Cosme Damiao
Borem, Aluizio
Título da Revista
ISSN da Revista
Título de Volume
Editor
Univ Estadual Maringa, Pro-reitoria Pesquisa Pos-graduacao
Resumo
The aim of this work is the construction of a genetic map and identification of quantitative trait loci (QTLs) that control characteristics of the root system of rice. We evaluated a F-2:3 population composed of 150 families from the cross between the varieties IAC 165 x BRS Primavera. Genotyping was performed in the F-2 population using 3,742 SNP (Single Nucleotide Polymorphism) markers. The evaluation of the root system in the F-3 population was performed through a large-scale phenotyping method based on image generation with a CI-600 root scanner and on quantification through the WinRhizo (R) software. The experiment was arranged in a randomized block design with three replications performed under greenhouse. The variables analyzed were root length, root surface area and root volume at the depths of 5 to 25 cm and 25 to 45 cm. The SNP markers analysis allowed the construction of the genetic map with a full length of 1424 cM. The linkage group with the largest coverage area was number 3 with 270 cM (100 SNPs), followed by linkage group 1 with 249 cM (170 SNPs) and linkage group 2 with 163 cM (99 SNPs). The genetic analysis allowed the detection of QTLs for all the characteristics.
Descrição
Palavras-chave
genomic, Oryza sativa L., DNA chip, QTL mapping, abiotic stress
Como citar
Acta Scientiarum-agronomy. Maringa: Univ Estadual Maringa, Pro-reitoria Pesquisa Pos-graduacao, v. 38, n. 4, p. 457-466, 2016.