Investigations on the pollen morphology of some fruit species [Bazi{dotless} Meyve Türlerinin Çiçek Tozu Morfolojisi Üzerine Araşti{dotless}rmalar]

Morphological characters are used to identify plant material. Pollen morphology is an important parameter. This is of great importance in detailed investigations by scanning electron microscope (SEM). In order to develop a plant material identification tool, this research was carried out to determine the pollen morphology of some fruit species using SEM on apple, pear, quince, apricot, plum, peach, almond, chestnut, walnut, pomegranate, and persimmon cultivars. The surface features, as well as length, width, and P/E ratio of pollen were observed. Pollen length and width changed with investigated species and cultivars; the longest and widest pollen grains were detected in peach and walnut, respectively. The pollen, according to P/E ratio, was prolate, suboblate, and perprolate based on the material. Regarding the surface features, the ornamentation of pear, quince, plum, peach, and almond pollen was striate and tectum perforatum, whereas that of apple, chestnut, apricot and pomegranate was striate, rugulate, and tectum imperforatum. Walnut and persimmon had special surface characteristics. © TÜBİTAK

Fruit characterization and evaluation of Fi hybrids in hacihaliloglu xivonne liverani combination

2-s2.0-85089445167Apricot is a type of fruit with high consumer demand because it is evaluated as table and dried. Different eco-geographic groups have varieties with superior characteristics. This situation is very important in terms of creating wide variations in breeding studies. In the current research, pomological and biochemical properties of 45 apricot hybrids obtained from the parental combination of Hacihaliloglu X Ivonne Liverani were analyzed and identified. Variation was determined related to investigated characteristics among apricot genotypes. The data were evaluated by PCA (Principal Component Analysis) and CA (Clustering Analysis) upon determining the correlation between properties. 10 PCA were obtained, and they defined 78.12% of the population with 27 characteristics. The highest correlation was stated between fruit weight and width. Hybrids were with small sized, orange color, free and sweet kernel. The organoleptic properties of most hybrids are at acceptable levels. © by PSP

Fruit characteristics of fire blight resistant F1 pear population

Fire blight, caused by Erwinia amylovora is the most devastating bacterial disease of pear. Disease effects all upper and under organs of host plants and kills whole plant. There is no certain management practice against this disease and chemicals used for fire blight are harmfull to environment, animal and human health. The lack of effective solution to the disease and the shift of the consuming tendency toward organic products lead to the usage of resistant rootstocks and cultivars in controlling the disease. However, all over the world the number of pear cultivar exhibiting high-resistance to fire blight and superior fruit quality parameters, is rather low. For this purpose, breeding projects TOVAG 106O719 and TOVAG 110O938 (TUBITAK) were initiated in order to develop new pear cultivars combining resistance to fire blight and superior fruit characteristics. With this aim different hybridization combinations were carried out. F1 hybrid population was artificially inoculated with different strains of Erwinia amylovora. Hybrids that bear fruit belong to group “A” (Very low susceptibility) were analyzed. Superior hybrids were detected via weighted ranking method by evaluating some characters as eating quality, fruit attractiveness, size, soluble solids content, firmness and rustiness, using two years data. Three genotypes were found superior. As a conclusion of the study, registration of the genotypes which are found to be superior is thought to contribute to fire blight disease management and pear cultivation. © 2020 International Society for Horticultural Science. All rights reserved.The projects in which the study material was obtained (TOVAG ? ? ?O ? ? ? and ? ? ?O ? ? ?) and the fruit characteristics were assessed (BAP ? ? - ? ? ? ? ? we? re) supported by TUBITAK and Eskişehir Osmangazi University Scientific Research Projects Commission, respectively

Selections for Resistance against Fire Blight in Young F-1 Hybrid Pear Seedlings in Turkey

13th International Workshop on Fire Blight -- JUL 02-05, 2013 -- Zurich, SWITZERLANDHORUZ, Sumer/0000-0002-5374-7082; Bilen, Emre/0000-0003-1745-4044WOS: 000357733400039Fire blight, caused by pathogenic bacterium Erwinia amylovora, is a serious disease of pear, with few effective disease management strategies. Therefore, it is very important to strive towards the selection of new resistant cultivars to fire blight. With this purpose, different crosses have been made between resistant cultivar 'Magness' and other resistant or susceptible cultivars and cultigens ('Akca', 'Ankara', 'Bursa', 'Conference', 'Guz', 'Kaiser Alexandre', 'Kieffer', 'Moonglow', 'Tas'). The susceptibility levels of the resulting hybrids were determined by artificial inoculations by Erwinia amylovora in greenhouse conditions. In pathogenicity tests, 10(8) CFU/ml populations of seven E. amylovora strains, isolated from different cities in Turkey, were used to infect the shoots of hybrid plants. Eight weeks after inoculations, the percentage of the necrotic lesion to the total length of the shoot was calculated for each shoot. The experiments were performed twice in August 2010 and May 2011. The average of two experiments was used to calculate the percentage disease severity. Susceptibility was scored by binning the percentage into five distinct classes of increasing susceptibility (A to E). Among 1242 young F-1 hybrid seedlings inoculated, 31.64% of them showed "very low susceptibility" (A), 8.62% displayed "low susceptibility" (B), 18.60% were "moderate susceptibility" (C), 30.27% were "high susceptibility" (D), 10.87% showed "very high susceptibility" (E), and 85 of hybrids were completely destroyed by the pathogen. The 393 "very low susceptibility" and 107 "low susceptibility" F1 hybrids were planted in Eskisehir, in Central Turkey, for screening for agronomical and pomological characteristics.Int Soc Hort Sc

Selections for resistance against fire blight in young F1 hybrid pear seedlings in Turkey

Fire blight, caused by pathogenic bacterium Erwinia amylovora, is a serious disease of pear, with few effective disease management strategies. Therefore, it is very important to strive towards the selection of new resistant cultivars to fire blight. With this purpose, different crosses have been made between resistant cultivar 'Magness' and other resistant or susceptible cultivars and cultigens ('Akca', 'Ankara', 'Bursa', 'Conference', 'Guz', 'Kaiser Alexandre', 'Kieffer', 'Moonglow', 'Tas'). The susceptibility levels of the resulting hybrids were determined by artificial inoculations by Erwinia amylovora in greenhouse conditions. In pathogenicity tests, 108 CFU/ml populations of seven E. amylovora strains, isolated from different cities in Turkey, were used to infect the shoots of hybrid plants. Eight weeks after inoculations, the percentage of the necrotic lesion to the total length of the shoot was calculated for each shoot. The experiments were performed twice in August 2010 and May 2011. The average of two experiments was used to calculate the percentage disease severity. Susceptibility was scored by binning the percentage into five distinct classes of increasing susceptibility (A to E). Among 1242 young F1 hybrid seedlings inoculated, 31.64% of them showed "very low susceptibility" (A), 8.62% displayed "low susceptibility" (B), 18.60% were "moderate susceptibility" (C), 30.27% were "high susceptibility" (D), 10.87% showed "very high susceptibility" (E), and 85 of hybrids were completely destroyed by the pathogen. The 393 "very low susceptibility" and 107 "low susceptibility" F1 hybrids were planted in Eskišehir, in Central Turkey, for screening for agronomical and pomological characteristics. © 2014, International Society for Horticultural Science. All rights reserved

Selections for resistance against fire blight in young F1 hybrid pear seedlings in Turkey

Fire blight, caused by pathogenic bacterium Erwinia amylovora, is a serious disease of pear, with few effective disease management strategies. Therefore, it is very important to strive towards the selection of new resistant cultivars to fire blight. With this purpose, different crosses have been made between resistant cultivar 'Magness' and other resistant or susceptible cultivars and cultigens ('Akca', 'Ankara', 'Bursa', 'Conference', 'Guz', 'Kaiser Alexandre', 'Kieffer', 'Moonglow', 'Tas'). The susceptibility levels of the resulting hybrids were determined by artificial inoculations by Erwinia amylovora in greenhouse conditions. In pathogenicity tests, 108 CFU/ml populations of seven E. amylovora strains, isolated from different cities in Turkey, were used to infect the shoots of hybrid plants. Eight weeks after inoculations, the percentage of the necrotic lesion to the total length of the shoot was calculated for each shoot. The experiments were performed twice in August 2010 and May 2011. The average of two experiments was used to calculate the percentage disease severity. Susceptibility was scored by binning the percentage into five distinct classes of increasing susceptibility (A to E). Among 1242 young F1 hybrid seedlings inoculated, 31.64% of them showed "very low susceptibility" (A), 8.62% displayed "low susceptibility" (B), 18.60% were "moderate susceptibility" (C), 30.27% were "high susceptibility" (D), 10.87% showed "very high susceptibility" (E), and 85 of hybrids were completely destroyed by the pathogen. The 393 "very low susceptibility" and 107 "low susceptibility" F1 hybrids were planted in Eskišehir, in Central Turkey, for screening for agronomical and pomological characteristics. © 2014, International Society for Horticultural Science. All rights reserved

Evaluation of Fire Blight (Erwinia amylovora) Disease Reaction of Pear Hybrid Combinations

Bilen, Emre/0000-0003-1745-4044; HORUZ, Sumer/0000-0002-5374-7082WOS: 000403032200003Fire blight caused by pathogenic bacterium Erwinia amylovora, is the serious disease of pear. Since there is no effective chemical management to this disease except antibiotic-type compounds, it is very important to improve new fire blight resistant cultivars. In this research, it was aimed to select and develop fire blight resistant pear types and to determine fire blight susceptibility levels of pear hybrids, obtained from different projects. Hybrid plants were inoculated by shoot injections twice each year. Evaluations were made through necrotic shoot rate and susceptibility levels of hybrids were determined. During the experiments, 7036 hybrid pear seedlings inoculated, and 12.28% of them were found as "very low susceptibility" (A), 3.62% as "low susceptibility" (B) classes.TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [TOVAG 106O719, 110O938]These projects were (TOVAG 106O719 and 110O938) supported by TUBITAK

Selections for Resistance against Fire Blight in Young F-1 Hybrid Pear Seedlings in Turkey

13th International Workshop on Fire Blight -- JUL 02-05, 2013 -- Zurich, SWITZERLANDWOS: 000357733400039Fire blight, caused by pathogenic bacterium Erwinia amylovora, is a serious disease of pear, with few effective disease management strategies. Therefore, it is very important to strive towards the selection of new resistant cultivars to fire blight. With this purpose, different crosses have been made between resistant cultivar 'Magness' and other resistant or susceptible cultivars and cultigens ('Akca', 'Ankara', 'Bursa', 'Conference', 'Guz', 'Kaiser Alexandre', 'Kieffer', 'Moonglow', 'Tas'). The susceptibility levels of the resulting hybrids were determined by artificial inoculations by Erwinia amylovora in greenhouse conditions. In pathogenicity tests, 10(8) CFU/ml populations of seven E. amylovora strains, isolated from different cities in Turkey, were used to infect the shoots of hybrid plants. Eight weeks after inoculations, the percentage of the necrotic lesion to the total length of the shoot was calculated for each shoot. The experiments were performed twice in August 2010 and May 2011. The average of two experiments was used to calculate the percentage disease severity. Susceptibility was scored by binning the percentage into five distinct classes of increasing susceptibility (A to E). Among 1242 young F-1 hybrid seedlings inoculated, 31.64% of them showed "very low susceptibility" (A), 8.62% displayed "low susceptibility" (B), 18.60% were "moderate susceptibility" (C), 30.27% were "high susceptibility" (D), 10.87% showed "very high susceptibility" (E), and 85 of hybrids were completely destroyed by the pathogen. The 393 "very low susceptibility" and 107 "low susceptibility" F1 hybrids were planted in Eskisehir, in Central Turkey, for screening for agronomical and pomological characteristics.Int Soc Hort Sc