How can narrow sense heritability be estimated from bi parental population?

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Jack Erron Haggard

I recommend that you read chapter 4 of Hallauer, Miranda-Filho, and Carena "Quantitative Genetics in Maize Breeding". You will find all your answers there.

There is a full-text of the latest edition of this classic text available on the internet, but I will not link to it as I am uncertain of its legality.

Pulipati Gangadhara Rao

Heritability (h² ns) = VA / VP x 100 or ½ D / VP

VA or D (additive genetic variance), VP or VP (phenotypic variance)