Question

difference between in genetic gain and genetic advance

Answer 1

hy!!
^_&

▪Fifteen elite yellow maize inbred lines were evaluated in a randomized complete block design experiment with three replicates in 2014. Data were collected on days to anthesis and silking, anthesis-silking interval, plant and ear heights, number of ears per plant, leaf area, ear weight and grain yield.

Mean values were used to determine characters' phenotypic and genotypic variances, phenotypic, genotypic and environmental coefficients of variation. Broad sense heritability and genetic advance percentage of mean were estimated for each trait. Significant variation existed in all the characters.

The coefficients of variation were low except for ear weight and grain yield that were relatively higher

▪High heritability and high genetic advance for ASI indicated the presence of additive genes in the trait and suggested reliable maize improvement through selection of the traits.

In this study moderate genetic advance was associated with high heritability.

hope helpmu

Answer 2

Genetic gain from selection, or simply “genetic gain,” is defined as the improvement in average genetic value in a population or the improvement in average phenotypic value due to selection within a population over cycles of breeding

Improvement in the mean genotypic value of the selected families over that of the base population is known as genetic advance under selection (Gs).