Yazar "Gundogdu, M. A." seçeneğine göre listele

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    Analysis of Genetic Diversity of Local Olive Varieties in Turkey by AFLP Markers
    (Int Soc Horticultural Science, 2011) Seker, M.; Gundogdu, M. A.; Ipek, M. S.
    Olive (Olea europaea L.) has great genetic variation in Turkey as important crop due to its economic value. There are many cultivars, types and landraces having good potential as a source of genes for productivity, oil quality and fruit characters which are difficult to differentiate by using morphological characters in different ecological conditions of Turkey. Therefore, genotypic identification studies are important for olive breeding, olive industry and genome analysis. In this study, local olive genotypes which are grown in Adana, Artvin, Aydin, Balikesir, Bursa, Canakkale, Gaziantep, Hatay, Kilis, Izmir, Manisa, Mersin and Tekirdag provinces of Turkey were investigated. Most of the genotypes in this study were used for the first time for evaluation of their genetic structures. Genetic diversity of local genotypes was estimated using amplified fragment length polymorphism (AFLP) markers. Sixty three olive genotypes were analyzed with five EcoRI-MseI primer combinations. Informative AFLP markers were generated and scored as binary data. Five primer pairs used in AFLP analysis detected 173 loci, of which 135 (78%) were polymorphic. Similarity coefficient matrix was computed to cluster the data and to draw precise relationships among the 63 studied olive genotypes. The generated dendrogram revealed three major groups.
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    Determination of Cluster Characteristics and Pomological Properties of Selected Clones of 'Elhamra' (Vitis vinifera L.) Grape Cultivar
    (Int Soc Horticultural Science, 2013) Dardeniz, A.; Seker, M.; Gundogdu, M. A.; Turker, L.; Arda, G.; Kahraman, K. A.
    'Elhamra' ('Honusu') is a popular cultivar which is grown in all vine production regions in Turkey and extensively in the East Mediterranean and South East Anatolia regions. The cultivar is late maturing and short-pruning. The flowers are functionally female, so the cultivar requires a pollinator. Three different 'Elhamra' clones were evaluated for their cluster and pomological characteristics in 2009 and 2010 harvesting seasons. The genotypes showed differing characteristics for ripening time and fruit parameters as follows: 'Clone 1' has large berries with deep red to violet-black colour, medium to moderate cluster size, tendency to parthenocarpy and is late maturing (through mid-October). 'Clone 2' has large berries with red to violet-black colour, large clusters and is late maturing (mid-October). 'Clone 3' has smaller to medium berries with pinkish green colour, having medium cluster size compared to the other clones, less tendency to parthenocarpy and is very late maturing (through end of October).
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    Determination of the effects of ecological differences on volatile compounds in 'Bayramic Beyazi' nectarine
    (Int Soc Horticultural Science, 2020) Gundogdu, M. A.; Sakaldas, M.; Kaynas, K.; Seker, M.
    White nectarine fruits, which are registered with the name of 'Bayramic Beyazi', are the novel stone fruit genotype grown in Canakkale. The fruits have a favorable and rich flavor for customer acceptance. White nectarines with high quality are the original material for improvement of new stone fruit varieties. The aim of present study was to determine the effect of ecological differences on volatile compounds in 'Bayramic Beyazi' white nectarine, which is widely grown in Canakkale Province in Turkey. Fruits of 'Bayramic Beyazi' white nectarine were harvested from 4 different commercial orchards in Canakkale and Balikesir provinces. These orchards cultivated in Bayramic and Pinarbasi counties in Canakkale province (2 plantations), Havran and Edremit counties in Balikesir province in 2017 season. Volatile component contents of ripe fruits of 'Bayramic Beyazi' were extracted by using diethyl ether solvent for liquid-liquid extractions. The amounts and identifications of the volatile compounds of extracted samples determined with a gas chromatography-mass spectrometer. According to the obtained results, a total of 30 volatile compounds were detected in total white nectarine fruits aroma profiles in different regions. Those were 10 esters, 6 C6 compounds, 5 terpenes, 5 aldehydes and 4 lactones. Hexanal, 2-hexanal, gamma-decalactone, Z-3-hexyl acetate and ethyl acetate were found as important major volatiles in all 'Bayramic Beyazi' fruits. Although C6 compounds and lactones were determined higher ratio in Bayramic location; fruits in Ezine location were found to have higher esters, aldehydes and terpenes.
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    Investigation of biochemical and pomological characteristics of different olive cultivars during maturation in North Aegean region of Turkey
    (Int Soc Horticultural Science, 2016) Gundogdu, M. A.; Kaynas, K.
    Olive (Olea europaea L.) has great genetic variation in Turkey as important crop due to its economic value. There are many cultivars, types and landraces with various morphological characters in different ecological conditions of Turkey, having good potential for productivity, oil quality and table olive characters. The northwestern region of Turkey with cool subtropical climate has most suitable ecological conditions for highest quality olives and olive oils. This research was carried out to compare some biochemical and pomological characteristics of six local olive cultivars including 'Ayvalik', 'Domat','Gemlik', 'Memecik', 'Samanli' and 'Uslu', which are widely grown in Turkey. Cultivars were collected in intervals of about 10 days from September 15 to December 22 in 2014. In this research fruit width (mm), fruit length (mm), fruit weight (g of 100 fruits), moisture content (%), pulp ratio (%), maturity index (MI), total chlorophyll content (mu g mL(-1)) and total carotenoid content (mu g mL(-1)) were determined. As a result of study, concentrations of total chlorophyll decreased although concentration of carotenoids increased when skin color of fruit is turning red, purple or black on more than a half of the surface (Maturity Index>3 and MI=4). Also fruit size enlarged with the increase of maturity.
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    Investigation of fatty acid compositions and some pomological characteristics of different olive cultivars during maturation in cool subtropical condition of Turkey
    (Int Soc Horticultural Science, 2020) Gundogdu, M. A.; Kaynas, K.
    Olive (Olea europaea L.) has great genetic variation in Turkey as important crop due to its economic value. There are many cultivars, types and landraces with various morphological characters in different ecological conditions of Turkey, having good potential for productivity, oil quality and table olive characters. The northwestern region of Turkey with cool subtropical climate has most suitable ecological conditions for highest quality olives and olive oils. This research was carried out to pomological characteristics and fatty acid composition of eight local olive cultivars including 'Ayvalik', ' Domat', 'Edincik Su', 'Gemlik', 'Karamursel Su', 'Memecik', 'Samanli' and 'Uslu', which widely grown in Turkey. Cultivars were collected in intervals of about 10 days from September 15 to December 22 in 2014. In this research fruit weight (g of 100 fruits), pulp ratio (%), maturity index (MI) and fatty acid composition were determined. As a result of this study, 'Domat', 'Karamursel Su' and 'Memecik' had the heaviest fruits and 'Memecik' and 'Domat' cultivars had the highest pulp ratio (%). 'Karamursel Su', 'Gemlik' and 'Samanli' were found to the highest maturity index values at the end of harvesting time. 'Karamursel Su' 'Domat' and 'Edincik Su' had highest ratios of polyunsaturated fatty acids whereas 'Memecik' and 'Uslu' cultivars had the highest ratios of monounsaturated fatty acids.
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    Investigation of Volatile Constituents in Some Promising Local Peach and Nectarine Genotypes Using the HS-SPME Technique by the GC-MS
    (Int Soc Horticultural Science, 2013) Seker, M.; Gur, E.; Ekinci, N.; Gundogdu, M. A.
    Fruit aroma is one of the most important consumer acceptability traits of peaches and nectarines. White nectarines are grown in the northwestern region of Turkey. They have small fruits that are white-cream colored and have high market value because of their unique aroma and attractive appearance. Ten peach and nectarine genotypes including local flat peach, three white nectarines and six standard cultivars were investigated for their volatile constituents using the SPME (Solid Phase Micro Exraction) technique by the GC/MS (Gas Chromatography/Mass Spectrometry). White nectarines, the most aromatic genotypes, were observed to accumulate high levels of esters when compared to the other genotypes.
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    The effects of preharvest 1-methylcyclopropene (Harvista) treatments on harvest maturity of 'Golden Delicious' apple cultivar
    (Int Soc Horticultural Science, 2016) Sakaldas, M.; Gundogdu, M. A.
    In this research, the effects of preharvest 1-methylcyclopropene (1-MCP) (Harvista) treatments on fruit drop, fruit quality and shelf life of 'Golden Delicious' apple cultivar were studied. For this purpose, Harvista treatments at doses of 25, 50, 100 and 200 g ha(-1) were applied to 'Golden Delicious' apple cultivar in Canakkale, Kepez region, Turkey. Samplings were carried out on trees 1 day before and 7, 14, 21 and 28 days after applications respectively. Fruit drop rate, flesh firmness, soluble solids content, starch degradation, titratable acidity, skin colour, and total phenolic compounds were evaluated after each sampling date. Furthermore, fruits were kept at 20-22 degrees C temperature and 50-60% relative humidity conditions as shelf life to determine the ethylene production. According to the results, Harvista applications with 100 and 200 g ha-1 doses were found out as the most positive applications because of preventing fruit drop and minimizing the changes of quality parameters. Harvest maturity could be prolonged for 21 to 28 days with these application doses.
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    The effects of preharvest 1-methylcyclopropene (Harvista) treatments on harvest maturity of 'Santa Maria' pear cultivar
    (Int Soc Horticultural Science, 2019) Sakaldas, M.; Gundogdu, M. A.; Gur, E.
    In this research, the effects of preharvest 1-methylcyclopropene (1-MCP) (Harvista) treatments on fruit drop, harvest maturity due to fruit quality parameters and shelf life of 'Santa Maria' pear cultivar were studied. For this purpose, Harvista treatments at doses of 50, 100, 150 and 200 g ha(-1) were applied to 'Santa Maria' pear cultivar with the comparison of naphthalene acetic acid in Canakkale, Biga region, Turkey. Samplings were carried out on trees 1 day before and 7, 14, 28 and 42 days after applications, respectively. Fruit drop rate, flesh firmness, soluble solids content, starch degradation, titratable acidity, skin colour, and total phenolic compounds were evaluated after each sampling date. Furthermore, fruits were kept at 20-22 degrees C temperature and 50-60% relative humidity conditions as shelf life for 7 and 14 days to determine the ethylene production. According to the results, Harvista applications with 150 and 200 g ha(-1) doses were found as the most positive applications because of preventing fruit drop and minimizing the changes of quality parameters. Harvest maturity could be prolonged for 28 days with these application doses. Harvista could be a good alternative for enlarging the harvest period on `Santa Maria' pears.