Heritability in Plant Breeding
Heritability Ø The ratio of genotypic variance to the phenotypic or total variance is called as heritability. Ø It is generally expressed in percentage. Ø It is the good index of the transmission of characters from parents to their off spring. Ø The estimates of heritability helps the plant breeder in selection of elite genotypes from diverse genetic populations. Types of Heritability Ø Depending upon the components of variance used as numerator in the calculation, heritability is of two types, viz; broad sense and narrow sense. Broad Sense Heritability Ø It is the ratio of genotypic variance to the phenotypic variance. Ø It is calculated from total genetic variance which consists of additive, dominance and epistatic variances. Main Features Ø It can be estimated from both parental as well as segregating populations. Ø It is estimated from total genetic variance. Ø It is useful in selecton of elite types from homozygo...