The narrow-sense heritability (h 2 ) for each trait in the given problem. Introduction: The contribution of genotypic variance concerning the total phenotypic variance is measured by broad-sense heritability (H 2 ). Narrow-sense heritability (h 2 ) is the cumulative genetic portion of phenotypic variance. The genotypic variance can be divided into subcomponents, which represent the different modes of the function of alleles at quantitative trait loci. Additive variance (V A ) is one of the subcomponents of genotypic variance. It is the genotypic variance that is the result of the cumulative function of alleles at quantitative trait loci.

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Chapter 25, Problem 14PDQ

(a)

Summary Introduction

To determine: The narrow-sense heritability (h²) for each trait in the given problem.

Introduction: The contribution of genotypic variance concerning the total phenotypic variance is measured by broad-sense heritability (H²). Narrow-sense heritability (h²) is the cumulative genetic portion of phenotypic variance. The genotypic variance can be divided into subcomponents, which represent the different modes of the function of alleles at quantitative trait loci. Additive variance (V_A) is one of the subcomponents of genotypic variance. It is the genotypic variance that is the result of the cumulative function of alleles at quantitative trait loci.

(b)

Summary Introduction

To determine: The trait that will respond likely to selection.

Introduction: The term heritability explains the ratio of the total phenotypic variation due to genetic components in a population. The values of heritability are used in animal and plant breeding to point the potential response of a population to artificial selection for a quantitative trait.

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