Phenotypic variability for qualitative and quantitative attributes of certain grape hybrids

Abstract

Hybrids of the crosses Anab-e-Shahi, Angur Kalan, Bangalore Blue, Black Champa, Convent Large Black, Thompson seedless and Queen of the Vineyard were evaluated with petiole nutrient contents and resistance to diseases. Hybrids derived from Anab-e- Shahi x Queen of the Vineyard (9/3), Angur Kalan x Anab-e-Shahi (5/4), and Angur Kalan x Black Champa crosses (26/8) were found to perform better. Dry matter content of the petioles appears to be a suitable index for higher yield. Higher chlorophyll ‘b’ content (light harvesting complex) was related to high yield in Bangalore blue. Use of Black Champa as seed parent and Queen of the Vineyard as pollen parent is good for imparting high vigour to the progeny. Duration for ripening depended on genetic constitution rather than on climatic factors. Glucose and fructose contents were high in Thompson seedless. Thompson seedless was very efficient in N uptake than Bangalore Blue. Hybrids 9/3 and 26/9 possessed higher P content which was related to high fertility. Ca and Mg contents had no relationship with yield whereas Fe, Zn and Mn showed some positive relationship. Seedless berries were obtained in hybrids derived from Black Champa and Thompson seedless. Hybrid 21/28 showed tolerance to downey mildew while Hybrid 30/14, tolerance to anthracnose and hybrid 21/28 to powdery mildew.