Freely available SAS software code for QTL and quantitative genetics analysis:       

SAS code to identify epistatically interacting QTLs.

SAS codes to estimate genotypic and phenotypic correlations and their approximate standard errors using multivariate REML.

SAS codes to estimate heritability and its approximate standard error using REML.

Code

USDA-ARS Maize Breeding and Genetics at NCSU