Journal of Applied Horticulture. 2002: 4(2): 118-120

Genetic variability in early ripening grape genotypes

Ram Kumar; Shailendra Rajan; Negi, S S; Yadava, L P

Central Institute for Subtropical Horticulture, PO Kakori, Rehmankhera, Lucknow - 227 107, India.

The phenotypic and genotypic coefficients of variability, heritability along with genetic advance for yield and yield components of 14 early maturing grape genotypes were studied. The differences among the genotypes were highly significant (p=0.05) for all the characters (except bunch length) studied. A wide range of variation was recorded for bunch width, number of berry per bunch, 100-berry weight, 100-seed weight, juice content, total soluble solids, reducing sugar, organic acid content and berry yield. Based on the coefficient of variation, broad sense heritability and expected genetic advance, it can be concluded that berry yield, 100-berry weight, 100-seed weight and organic acid content provides a greater scope for selection of superior genotypes. Among the 14 genotypes, Flame seedless produced the highest (17.6 t/h) berry yield; Cardinal registered highest (275.6 g) 100-berry weight with high (6.5 g) 100-seed weight; and Pusa Navrang showed highest organic acid content and 100-seed weight (6.7 g). The characters studied are quantitatively inherited and non-additive effects were detected with organic acid.