Genetic variability, heritability and genetic advance relating to some plant characters in mango (Mangifera indica L.).
Samanta A. K., Chattopadhyay T., Roy S.
Author Affiliation: Faculty of Horticulture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, India.
Horticultural Journal 12 : 41-45
Abstract : Information on genetic variability and heritability is derived from data on various morphology characters in 25 genotypes of mango (Mangifera indica) grown in West Bengal. The genotypes showed significant differences for all the characters studied. A broad range of variation was observed for leaf length, average number of leaves/twig, number of tertiary branches, and chlorophyll a and chlorophyll b contents. A great degree of difference was observed between phenotypic and genotypic coefficients of variation for number of tertiary branches and number of scaffold branches, indicating the influence of the environment for these traits. High heritability along with high genetic advance was recorded for average number of leaves/twig, indicating the importance of additive gene action. Leaf length, leaf breadth, petiole length, internodal length, thickness of one-year-old shoots, and chlorophyll a and chlorophyll b contents showed high heritability and low genetic advance, indicating the presence of non-additive gene action. Low heritability along with low genetic advance was recorded for number of scaffold branches and number of tertiary branches, indicating the large influence of the environment.