PROC CORR DATA=dataset ;

VAR variable(s);

RUN;

if you want the spearman rank correlation add the option :

PROC CORR DATA=dataset SPEARMAN;

VAR variable(s);

RUN;

see, e.g.:

https://v8doc.sas.com/sashtml/proc/zorr-ex1.htm

Thank you MS. Jos Feys,

I am seeking genotypic and phenotypic correlation rather than Person or spearman correlation for breeding.

Can you send the geno and pheno correlation syntax, please?

PROC GLM DATA=your_data_set;

CLASS group;

MODEL trait1 = trait2 / SS3;

MEANS trait2 / BDIFF;

RUN;