Genetic variability, heritability, and genetic advance in strawberry (Fragaria × ananassa Duch.)

Authors : PRANAV KUMAR MISHRA, RAM BADAN RAM, NEERAJ KUMAR

Pages : 451-458

Doi:10.3906/tar-1408-99

View : 22 | Download : 10

Publication Date : 2015-06-01

Article Type : Research Paper

Abstract :Strawberry insert ignore into journalissuearticles values(Fragaria à ananassa Duch.); genotypes were evaluated to study genetic variation and the relationship between yield and its component using a randomized complete block design during 2013/14. The results showed significant variance among genotypes of all traits. The phenotypic coefficient of variation insert ignore into journalissuearticles values(PCV); for all the characters was slightly higher than genotypic coefficient of variation insert ignore into journalissuearticles values(GCV);, which signified the presence of environmental influence to some degree in the phenotypic expression of characters. Dry fruit weight had the highest PCV insert ignore into journalissuearticles values(52.47); and GCV insert ignore into journalissuearticles values(48.26);. The estimates of narrow sense heritability insert ignore into journalissuearticles values(h2); were observed to be lower than those of broad sense heritability insert ignore into journalissuearticles values(H2); for all the characters. Genetic advance was recorded as maximum for fruit yield per plant insert ignore into journalissuearticles values(76.84);, whereas genetic advance as percent of mean was highest for dry fruit weight insert ignore into journalissuearticles values(84.09);. Highest heritability insert ignore into journalissuearticles values(H2, 98.44); was coupled with higher genetic advance insert ignore into journalissuearticles values(76.84); estimated for fruit yield per plant, which indicated that the character is controlled by additive genes and therefore further improvement could brought by selection. Fruit yield was significantly and positively associated with most of the characters except number of leaves per plant, titratable acidity, and ascorbic acid at both genotypic and phenotypic levels; therefore, these are important prerequisites to formulate a successful improvement program.
Keywords : Correlation, coefficient of variations, genetic variability, genetic advance, heritability, strawberry