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In order to study the quantitative and qualitative traits of seedless hybrids and compare them with two commercial grape cultivars, this research was carried out for 5 years in three grape growing regions of the country (Urmia, Qazvin and Shiraz). In two years after planting the seedlings, the special training system of each region was implemented and in the last two years, reaching the fruiting stage, the quantitative and qualitative traits of the fruits were measured. These traits include cluster weight, mean berry weight, cluster and berry size, TSS, acid, fruit pH, berry color, seedlesness, flower type, phenological dates including bud burst, flowering time, verasion and ripness were recorded during the study years. The taste characteristics as well as the fruit marketability of the hybrids and the control were determined through scoring. The results showed that among the studied hybrids, H1R4B13, H1R5B13 and H1R8B6 hybrids had high yield and fruits with suitable marketing quality.
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