CROMOSOMAS QUE CONTRIBUYEN A LA RESISTENCIA A HONGOS Y VIRUS EN MAÍZ

ROSSI E.A., RUIZ M., BONAMICO N.C.; RUEDA CALDERÓN M.A., BRUNO C., BALZARINI M.

Congreso; Seamaíz. XI Congreso Nacional de Maíz; 2018

Several studies report quantitative trait loci (QTL) for disease resistance in maize. A Meta-analysis of the primary results is crucial. In this work we performed a systematic review (SR) by searching multiple databases on loci impacting maize resistance to diseases. Several studies on QTL for resistance to fungi and viruses were found. Then, we performed a meta-analysis (MA) aimed at identifying maize chromosomes carrying major-effect QTL for resistance to diseases caused by fungi and viruses. Overall 110 primary studies with data on genetic effects of fungal and viral resistance, 1080 QTL were reported. The odds of finding major-effect loci for fungi and viruses resistance in chromosome 10 were twice as high as the odds of finding those loci in the rest of the genome. Chromosomes 6, 5, 1 and 2 also have high odds of significant QTL for disease resistance, but the major-effect QTL reported for resistance to fungal diseases were not located on the same chromosomes as those with virus resistance. Major-effect loci on chromosome 3 were not agreed among studies. Our results summarized published findings and empower information about key genome regions for maize breeding against yield losses caused by fungi and viruses.