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    Evaluation of fruit firmness among the segregation population strawberries developed from ‘Ottoman’ × ‘Camarosa’
    (International Society for Horticultural Science, 2019) Serçe, S.; Gündüz, K.; Çürük, S.
    Turkish strawberry production has an increasing trend. ‘Ottoman’ is one of the Turkish strawberry genetic resources with unique horticultural attributes such as aroma content. However, fruit firmness of ‘Osmanlı’ is low. In this study, a segregation population having 340 individuals, produced from ‘Ottoman’ × ‘Camarosa’ were characterized for many horticultural traits for two years. The hybrids were grown in an annual hill cultural system with summer planting on an open field conditions and flowering and runnering dates were recorded. Flower and leaf characteristics were determined in December in both experimental years, while pomological traits of fruit width, length and weight, soluble solids, fruit firmness, fruit external and internal colors were determined periodically during the whole experiment. A great deal of diversity was recorded among the hybrids for the most of the traits evaluated. For example, fruit firmness ranged between 0.2 and 1.5 kg cm-2; while the ranges for soluble solids, total fruit number and yield were 4.0-15.0%, 2-192 and 11.9-1220.8 g, respectively. The data from two experimental years were compared using regression analysis. Except petiole length, leaf width and length, all other traits evaluated had statistically significant correlation between their two years (P=0.000-0.017). 78 individuals from this population were genotyped with 33 SSR primer pairs which had previously been proven to be informative for this population. © 2019 International Society for Horticultural Science. All rights reserved.
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    Öğe
    Production of diploid and amphidiploid interspecific hybrids of eggplant and Solanum Torvum, and pollen fertility
    (Pakistan Agricultural Scientists Forum, 2018) Çürük, S.; Dayan, A.
    Eggplant (Solanum melongena L.) is susceptible to several pathogens and pests. However, Solanum torvum is resistant to Verticillium, bacterial wilts, root-knot nematode and some mycoplasmas. Sterile interspecific hybrids have been obtained from sexual or somatic hybridization studies of these species. The objective of this study is identifying a protocol that allows production a large number of interspecific hybrid plants between S. melongena and S. torvum by using in vitro embryo rescue and increasing the fertility by chromosome doubling to overcome the interspecific incompatibility problem. Seventy-seven interspecific hybrid genotypes from eggplant cultivar Faselis F1 × S. torvum crossing were produced by in vitro embryo rescue from the seeds or underdeveloped ovules. Pollen viability and germination of the 50 interspecific hybrid genotypes were examined. The lowest and highest pollen viabilities in interspecific hybrid genotypes were 0.0% and 11.11%, respectively. The in vitro pollen germination of interspecific hybrids was by 0.0-1.36%. However, there was no fruit setting when the interspecific hybrid genotypes were backcrossed as a female with the parental species. The amphidiploid plants of some interspecific hybrid genotypes were obtained by 0.03% colchicine application. The pollen viability and germination percentages of the amphidiploid genotype were 11.57 and 9.43 fold of its diploid origin genotype, respectively. © 2018, Pakistan Agricultural Scientists Forum. All rights reserved.