Mapeamento por associação genômica ampla para identificação de resistência ao mofo branco em soja

Abstract

White mold is a disease of great importance in Brazil. Selection for white mold resistance would be greatly facilitated by the use of molecular markers and the discovery of genes involved with the disease. Soybean do not have complete resistance, but instead have differing levels of partial resistance that could be successful in slowing disease progression enough to allow the plants to recover, especially if the environment favors more the plant and less the pathogen. Molecular markers of the SNP type were identified from soybean genotypes, with the purpose of associating molecular markers with the resistance to fungus S. sclerotiorum in the wide genome by the GBS technique. We collected soybean genotypes reported as partially resistant to disease, as well as many from three different breeding programs in Brazil. We inoculated the plants with the isolate Jataí at the V2 stage using the straw test method and scored disease progress down the plant stems at four days post inoculation.

Genetic Diversity and Selection Footprints in the Genome of Brazilian Soybean Cultivars

“…Soybean is an autogamous plant, which explains the high level of homozygosity detected in the markers. This has been widely documented by other authors who have worked with soybean and other autogamous crops ( Cockram et al, 2010 ; Mesquita, 2017 ; Sherman-Broyles et al, 2017 ; Li et al, 2020 ). The prevalence of SNPs classified as transitions corroborates values found in the literature ( Van et al, 2005 ; Shu et al, 2011 ; dos Santos et al, 2016 ).…”