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Type: Artigo
Title: Application of different cover crops and mineral fertilizer doses for no-till cultivation of broccoli, cauliflower and cabbage
Author: Torres, José Luiz Rodrigues
Gomes, Fernando Rodrigues da Cunha
Barreto, Antônio Carlos
Tamburús, Amanda Yamada
Vieira, Dinamar Márcia da Silva
Souza, Zigomar Menezes de
Mazetto Júnior, José Carlos
Abstract: The aim of this work was to identify genomic regions associated with northern leaf blight resistance (Exserohilum turcicum) in common maize lines and to study the control involved in the resistance. For association mapping, 72 maize lines were previously genotyped for SNP markers on the 650K platform (Affymetrix®), and their respective genotypic values were predicted by mixed models for northern leaf blight. In order to avoid spurious associations between SNP markers and the studied character, the analysis of population structure was initially performed. The analysis of association between the SNP and northern leaf blight markers was carried out using a linear mixed model. For the study of genetic control, the experiment was conducted in 2016 and it was composed of randomized blocks with three repetitions. Through the notes attributed to the lines and their respective generations, the genotypic data related to the inheritance of the studied disease were extracted. Analyzing the results, QTLs were found on chromosomes 1, 2, 3, 4, 6, 8, 9 and 10 for northern leaf blight in maize, which may increase, reduce or even override the effect of this attribute. Among the QTLs found, five genomic regions were detected for increased resistance to northern leaf blight with the use of SNP markers, found in chromosomes 3 (SNP210703), 8 (SNP507268 and SNP507269), 9 (SNP544616) and 10 (SNP610500). The genetic control of resistance to northern leaf blight is quantitative, with the additive effects being more important in the character determination. In addition, it presents high restricted heritability (88%), which allows good selection efficiency and selection gains.
Subject: Ciclagem de nutrientes
Adubos e fertilizantes
Country: Austrália
Editor: Southern Cross Journals
Rights: Fechado
Identifier DOI: 10.21475/ajcs.17.11.10.pne645
Date Issue: 2017
Appears in Collections:FEAGRI - Artigos e Outros Documentos

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