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Heritability

I have general, practical question about marker-based heritability (e.g. GREML).

If a group of e.g. 100 SNPs from GWAS explains 0.20 of heritability for some trait, which has a heritability of 0.30, have I just explained almost all heritability of that trait (0.20 of 0.30) or just 0.20 of 0.30 that stands for 100%?

greml heritability

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