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    EFFECT OF DIFFERENT ROOTSTOCKS ON POLLEN FERTILITY OF INTERSPECIFIC EGGPLANT HYBRID (SOLANUMMELONGENA L. X SOLANUM TORVUM SW.) GENOTYPES
    (Pakistan Agricultural Scientists Forum, 2022) Dayan, A.; Curuk, S.
    The major bottleneck in interspecific hybridization is the sterility of the hybrid individuals. Different methods such as tissue culture techniques, molecular studies and grafting are used to overcome the sterility barriers as a result of hybridization between species. In the present study, the grafting method was used to overcome the low pollen fertility of hybrid plants obtained from the hybridization between Solanum melongena and Solanum torvum. Three different rootstocks with high fertility (Pala, Faselis F1, and S. torvum) were used for grafting. Three interspecific hybrids (8/I-3, 8/II-1 and 8/IV-2) were used as the scion. Pollen viability and pollen germination rates of these genotypes were determined. According to the data obtained, it was determined that the pollen viability and germination were affected significantly by the rootstock-genotype combination. The highest rate of pollen viability and pollen germination was obtained from Pala -8/II-1 combination. The rate of pollen stained in red + pink of the 8/II-1 genotype grafted on Pala rootstock increased 98.00 times and the pollen ratio stained only in red increased 77.87 times, compared to the non-grafted. The Pala was determined as the most suitable rootstock for the interspecific hybrids.
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    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.
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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) Curuk, 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 F-1 x 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.