| Abstrakt: |
Breeding of table grapes to obtaine new superior seedless cultivars have a great importance in its marketing. Six new bred early ripening hybrids, derived from crosses among four seedless male parents and seven seeded female parents were compared with 'Yaghouti' cultivar. In this study, yield and qualitative traits were studied in randomized complete block design with eight replications (8 plants per hybrid) in horticultural research station of College of Agriculture and Natural Resources, University of Tehran during years 2014 and 2015. All hybrids ages were 4 to 5 years old at the time of evaluation and were trained as head pruning. The results of means comparisons showed significant differences among hybrids for all measured traits. In terms of ripening time, genotypes S51 and I21 with average of 53 and 59 days were ripened earlier than 'Yaghouti' (69 days). Hybrids I10 and E10, had maximum berry size while 'Yaghouti' had the lowest. Hybrid S51 had highest ratio of sugar to acid. However, hybrid I10 and 'Yaghouti' cultivar had the highest and lowest single seed fresh weight. In panel test of seed trait, hybrids S51, I21 and I13 were recognized as completely seedless, C25 as semi seedless, and I10 and E10 as seeded hybrids. Considering all qualitative and quantitative traits, two hybrids (S51 and I21) were selected as superior early ripening seedless hybrids. [ABSTRACT FROM AUTHOR] |
