SCREENING OF TOMATO GERMPLASMS FOR QUALITY AND YIELD

M.K. Bhattacharyya, K.S. Nandpuri, S. Singh
A collection of tomato consisting 50 genotypes from different geographical regions were evaluated for yield per plant, juice content, ascorbic acid content, dry matter content and shelf life during 1976–77. Significant differences were observed for all the traits. A discriminant function was constructed by putting equal weightages to the quality traits and three times weightage to yield per plant. Discriminant function thus constructed was utilized to calculate the genotypic values for all the genotypes and were ranked according to their genotypic values for quality traits and yield per plant together and for quality traits alone. From the relative ranking of the genotypes, Angurlata was found to be the best genotype considering its genotypic value (643.93) for both yield per plant and quality traits. It was followed by HS 101, Punjab Chhuhara, Basket, V.T.S. and so on. High genotypic values of these genotypes were due to their high genotypic values for yield per plant. Considering quality attributes alone, wild collections Lycopersicon peruvianum (E.C. 69975, E.C. 65980 & E.C. 65971) and L. pimpinellifolium expressed comparatively higher genotypic values. More than 90% of the total genotypic values of these wild collection was contributed by quality attributes. Therefore, wild species can be a source of genes for further improvement of quality in tomato cultivars. However, considering the crossability barriers, L. pimpinellifolium will be the most suitable parent for such hybridization program, although it expressed the lowest genotypic value among the wild species. In such a program the other parent should be selected considering its big fruit size.
Bhattacharyya, M.K., Nandpuri, K.S. and Singh, S. (1979). SCREENING OF TOMATO GERMPLASMS FOR QUALITY AND YIELD. Acta Hortic. 93, 301-306
DOI: 10.17660/ActaHortic.1979.93.28
https://doi.org/10.17660/ActaHortic.1979.93.28

Acta Horticulturae