Genomic significance level analisys on the identification of the molecular marker in low heritability characteristics

Abstract

The aim of this work was to analyze different significance levels in the identification of molecular markers related to a low heritability characteristic. A comparison among the levels of 1%, 5%, 10% and 20% was accomplished through a computer system of genetic simulation (GENESYS), using an assisted selection of molecular markers for their evaluation. The results indicated superiority of the higher magnitude significance levels (10% and 20%) compared to the lower values (1% and 5%), related to its phenotypic gains after the selection, besides the benefits in some genetic parameter (lower medium endogamy, higher number of identified markers and lower marker setting). This way, although the levels of 1% and 5% present a higher precision detecting the markers- QTLs (quantitative trait loci), they still need to improve the genetic benefits, resulting in phenotypic and lower genetics gains.