Associação de marcadores moleculares SNP com o conteúdo de ácido linolênico em sementes de soja

Abstract

The objective of this work was to validate the association of single nucleotide polymorphism (SNP) markers for the genes FAD3A, FAD3B, and FAD3C with the linolenic acid content (18:3) in soybean seeds and to analyze the influence of the genetic parameters of these markers on this trait. One hundred and eighty-five F2 progenies derived from a cross between A29 (mutant for the three FAD3 genes, 1% 18:3 content) and Tucunaré (wild-type genotype, 11% 18:3 content) were genotyped. The molecular markers for genes FAD3A, FAD3B, and FAD3C explained the variations in 18:3 content of the F2 and F2:3 segregating populations. In addition, allelic substitutions in the FAD3A locus provide greater variations in 18:3 content than substitutions in the other two loci.