262,833 research outputs found
Effects of drought on physiological and morphological features of wild and domestic Turkish watermelon genotypes
No full text10th EUCARPIA Meeting on Genetics and Breeding of Cucurbitaceae -- OCT 15-18, 2012 -- Antalya, TURKEYWOS: 000345687100038This research was carried out between 2007 and 2008 to determine drought tolerance of domestic and wild watermelon genotypes in Sanliurfa (Turkey) condition. A total of 32 wild and domestic watermelon genotypes were used in this experiment. Morphological and physiological treatments such as leaf relative-water content, leaf temperature, chlorophyll contents, leaf water potential, leaf color, leaf area, number of stomata, width of stomata, length of stomata, plant height, number of nods on the plant, plant dry matter ratio, main stem diameter, turgority and final drought resistance tests were examined. Drip irrigation treatments included complete irrigation cut off, dry (I-0), full irrigation based on replenishment of soil water depleted from 0-90 cm profile (I-1) and 50 % full irrigation (I-2). At the end of the experiment, fifteen genotypes (Kar-24, Kar-25, Kar-27, Kar-59, Kar-86, Kar-114, Kar-143, Kar-147, Kar-163, Kar-185, Kar-197, Kar-203, Kar-215, Kar-218 and Kar-224) were found as tolerant and seventeen genotypes (Kar-26, Kar-35, Kar-37, Kar-39, Kar-98, Kar-99, Kar-117, Kar-140, Kar-154, Kar-177, Kar-184, Kar-212, Kar-234, Kar-243, Kar-330, Kar-332 and Kar-325) were found as intolerant.European Assoc Res Plant Breeding, Cukurova Univ, Minis Food, Agr & Livestock, Turkish Sci & Technol Council, Antalya Tarim, Manier Seed, Yuksel Seed, Syngenta, AG Seed, Fito Seed, Multi Seed, Nunhems, Rijk Zwaan, Bati Akdeniz Agr Res Inst, Alata Hort Res StatTurkish Scientific and Technological Research Council-TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [107T613]; Cukurova University Research FundsThe author thank to Turkish Scientific and Technological Research Council-TUBITAK (Project Number: 107T613) and Cukurova University Research Funds for their financial supports. The authors thank also to USDA-USA for their kindly help in seed supplying and Dr. I. Solmaz from Cukurova University for seed regeneration
In vitro ovule and ovarium culture in watermelon
No full text10th EUCARPIA Meeting on Genetics and Breeding of Cucurbitaceae -- OCT 15-18, 2012 -- Antalya, TURKEYWOS: 000345687100130Unfertilizated ovaries of Halep karasi watermelon genotype were picked on the day of anthesis, one day before anthesis and one day after anthesis. Ovaries were sliced for ovary culture and ovules were extracted from ovaries for ovule culture in sterile conditions. Ovary explants and ovules were cultured on two different (MS and CBM) mediums supplemented with 1 mg/l TDZ (thidiazuron), 1 mg/l SPM (spermin) and 1 mg/l TDZ + 1 mg/l SPM. Ovary explants and ovules were incubated at 25-26 degrees C, having 3000-4000 lux light density, possessing 16/8 h light/dark photoperiod for 8 weeks. After plant regeneration from ovules and ovaries they were transferred to growth regulator free MS and CBM medium. In ovule culture, the highest plant regeneration rate was 2.5% and obtained from MS + 1 mg/l TDZ and CBM + 1 mg/l SPM medium in ovary explants harvested one day after anthesis. The ovary harvest stage was one day after anthesis. The highest plant regeneration percentage in ovary explants was 10% and achieved from MS + 1 mg/l TDZ medium in one day after anthesis period. Totally four plants were obtained from ovary culture. Each plant was coded and cut for propogation. After each line reached 10 plants they were acclimatized and transferred to greenhouse. The pollen formation proved that in vitro regenerated watermelon plants from ovaries were diploid.European Assoc Res Plant Breeding, Cukurova Univ, Minis Food, Agr & Livestock, Turkish Sci & Technol Council, Antalya Tarim, Manier Seed, Yuksel Seed, Syngenta, AG Seed, Fito Seed, Multi Seed, Nunhems, Rijk Zwaan, Bati Akdeniz Agr Res Inst, Alata Hort Res Sta
New Fusarium wilt resistant melon (Cucumis melo var. cantalupensis) varieties developed by dihaploidization: Sari F1, Yetisir F 1, Solmaz F1, Emin F1 and Yucel F1
No full textResearches on Galia type melon breeding was started in 1995 at Cukurova University, Turkey. The aim of this study was to develop new melon cultivars which belong to Cucumis melo var. cantalupensis group having high yield and quality, suitable for both greenhouse and open field cultivation and also resistant to race 0 and 1 of Fusarium oxysporum f. sp. melonis wilt which are common in Turkey. For this purpose 9 female parental lines were crossed with the donor male parents which are resistant to 0 and 1 races of Fusarium wilt. By this way F1 hybrids were produced, and after the first backcrosses were done, BC1 genotypes were developed. Haploid embryo inductions and haploid plant productions were obtained by pollination with irradiated pollen. These haploid plants were duplicated by colchisine treatment and dihaploid pure lines were produced. General combination ability and special combination ability tests were conducted and more than 200 F1 hybrids were developed. These hybrids were tested in open field and greenhouse conditions for many years and Sari F1 was registered in 2008, Yetisir F1, Solmaz F 1, Emin F1 and Yucel F1 were registered in 2009 by Central Certification and Registration Management of Turkish Ministry of Agriculture. These 5 varieties have some differences concerning their total and early yields, fruit size and TSSC
Seed characteristics and seedfruit correlation of Turkish watermelon germplasm
No full textThis study was carried out at the Department of Horticulture, Faculty of Agriculture, University of Cukurova. Totally, 327 genotypes were used which mostly collected from different regions of Turkey since 1993. Seed weight, seed length and seed width of 15 seeds per genotype were measured. The seed weight, length, and width ranged from 20 to 211 mg, 5.03 to 16.63 mm and 3.39 to 9.53 mm, respectively, among genotypes. Nine genotypes were selected based on seed size (3 small, 3 medium, 3 big) in order to evaluate correlation between seed and fruit characteristics. Correlation analysis was performed between measured seed parameters and fruit weight, length and diameter in the nine genotypes. Measured seed parameters were negatively correlated with fruit weight, length and diameter while seed weight was positively correlated with seed lengt
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Citrulline can be used as a biochemical marker in watermelon screening studies for tolerance to drought and salinity
No full text10th EUCARPIA Meeting on Genetics and Breeding of Cucurbitaceae -- OCT 15-18, 2012 -- Antalya, TURKEYWOS: 000345687100049Salinity and drought are two of the most important environmental factors that cause reduction in plant growth, development and productivity worldwide. In the present study, we have investigated the effect of citrulline on drought and salt tolerance in watermelon genotypes. Seeds were germinated in plastic pots containing vermiculite. Plants with three true leaves were subjected to drought and salt stress. Stress responses of the watermelon genotypes were evaluated in early plant development stages. Genotypes were classified according to their citrulline level. Watermelon genotypes with tolerance to salt, KAR-152, KAR-278, KAR-306 and KAR-338, were induced to accumulate citrulline. On the other hand, genotypes with drought tolerance KAR-98, KAR-234, KAR-278, KAR-300, KAR-306 and KAR-374 accumulated higher levels of citrulline than sensitive genotypes. The result of the study, evaluating citrulline as a biochemical marker for salt and drought tolerance of watermelon genotypes is discussed.European Assoc Res Plant Breeding, Cukurova Univ, Minis Food, Agr & Livestock, Turkish Sci & Technol Council, Antalya Tarim, Manier Seed, Yuksel Seed, Syngenta, AG Seed, Fito Seed, Multi Seed, Nunhems, Rijk Zwaan, Bati Akdeniz Agr Res Inst, Alata Hort Res StatUNDP [MDG- F 1680]; Cukurova UniversityCukurova University [ZF2009KAP7, ZF2010KAP1, ZF2011KAP3]The authors want to thank to the UNDP ( United Nation Development Programme) for supporting our work with " MDG- F 1680 UN joint programme on enhancing the capacity of Turkey to adapt to climate change". Many thanks also Cukurova University for the financial supports of ZF2009KAP7, ZF2010KAP1 and ZF2011KAP3 projects. Also many thanks to K.Suyum, G. Aydoner, M. Akyol, Y. Akhoundnejad and A. Bol for helping to grow plants in the greenhouse
Restauro e conservazione dei beni culturali cartacei: effetti indotti da nanoparticelle nella cellulosa degradata dall'idrolisi acida
No full textStudi sul degrado della carta hanno mostrato come l'idrolisi acida sia la principale causa di degrado dei documenti cartacei. Il processo di deacidificazione non acquoso mediante l’applicazione di nanoparticelle, nel caso dei beni cartacei in cui siano presenti pigmenti e/o inchiostri sensibili all’acqua, risulta essere uno dei metodi più adatti per la conservazione e tutela di tali beni dall’attacco acido. Pertanto in questo lavoro di ricerca sono stati studiati i meccanismi fisici legati all'organizzazione dei frammenti di cellulosa in seguito al fenomeno dell'idrolisi acida e la riorganizzazione della cellulosa dopo la deacidificazione dei campioni mediante le nanoparticelle di idrossido di calcio. Il monitoraggio dei cambiamenti strutturali dei campioni cartacei è stato fatto mediante l'uso di due strumenti basati sulla risonanza magnetica nucleare (NMR): l'NMR-MOUSE, uno strumento a basso campo, che mediante misure non invasive consente, attraverso mappe di correlazione bidimensionali dei tempi di rilassamento T1-T2, di monitorare la distribuzione dell'acqua in differenti siti e uno strumento NMR ad alto campo per le misure di diffrazione e di diffusione delle molecole di acqua. Quest’ultimo strumento ha consentito di rilevare le variazioni morfologiche e dimensionali dei pori nei differenti campioni sottoposti ad analisi.
Dai risultati ottenuti si è quindi rilevato che in seguito all’idrolisi acida si ha un’apertura nella struttura microfibrillare della carta dovuta alla rottura dei legami β-glucosidici nelle catene cellulosiche, mentre il processo d’invecchiamento porta alla formazione di legami cross-linking. Questo tipo di riarrangiamento delle catene cellulosiche è accelerato dagli acidi. Invece nel caso del campione deacidificato mediante nanoparticelle è stato osservato che questo riesce a recuperare i parametri fisici del campione non trattato in quanto gli agenti deacidificanti, oltre a neutralizzare gli acidi nella carta, rilegano i frammenti cellulosici agendo come consolidante. I campioni deacidificati inoltre nel processo d’invecchiamento subiscono minori modifiche strutturali rispetto a quelli senza nanoparticelle, indice di un’azione protettiva che queste hanno nei confronti della cellulosa, specialmente dal punto di vista fisico
Determining the agronomic characteristics of Turkish watermelon genotypes for developing breeding lines
No full text10th EUCARPIA Meeting on Genetics and Breeding of Cucurbitaceae -- OCT 15-18, 2012 -- Antalya, TURKEYWOS: 000345687100046Watermelon is an important vegetable in Turkey with approximately four million tonnes of annual production. Despite a wide range of morphological diversity in Turkish watermelons, mainly imported hybrid watermelon cultivars are used in production due to high yield and quality. The watermelon genebank in the Department of Horticulture in Cukurova University consists of 475 accessions collected from different regions of Turkey and provided from different genebanks of the world. These watermelon genetic resources were morphologically characterized, elite accessions that were chosen and self-pollinated for use in breeding studies. The aim of this study was to evaluate the horticultural characteristics of promising watermelon genotypes for two years. Length of main stem, diameter of main stem, number of branches per plant, number of nodes on main stem, yield, fruit weight, fruit length, fruit diameter, rind thickness and total soluble solids were measured in all genotypes. Data analysis indicated that the Turkish genotypes had high diversity for plant and fruit characteristics.European Assoc Res Plant Breeding, Cukurova Univ, Minis Food, Agr & Livestock, Turkish Sci & Technol Council, Antalya Tarim, Manier Seed, Yuksel Seed, Syngenta, AG Seed, Fito Seed, Multi Seed, Nunhems, Rijk Zwaan, Bati Akdeniz Agr Res Inst, Alata Hort Res StatCukurova University, Unit of Scientific Research Projects [ZF 2010BAP31]This research was supported by Cukurova University, Unit of Scientific Research Projects (Project no: ZF 2010BAP31
Association mapping of some selected watermelon traits using molecular markers
No full textAssociation mapping of qualitative and quantitative characters is useful for finding gene markers and have not been reported in watermelon. The objective of this study was to detect molecular markers associating with 19 plant and fruit related traits such as number of branches and seed coat color. Ninety-six watermelon lines were selected from 259 accessions selfed 4 to 6 times available in germplasm resources. Sequence related amplified polymorphism (SRAP) primer combinations selected from 208 combinations were used to study 259 watermelon lines available in the Turkish genetic resources. The number of watermelon lines was reduced to 96 to eliminate highly identical ones based on Dice coefficient and UPGMA tree nested in NTSYS software PC version 2.1. This result indicated that most watermelons available in this germplasm were highly related. Morphological evaluations were performed at the University of Cukurova in Adana. Population structure data were obtained using "STRUCTURE" software. Association analyses are being performed using the "TASSEL" software to identify molecular markers associated with 19 important watermelon traits. Using a SAS program, regression analysis is being performed to exclude redundant markers at the alpha 0.10 level. Our preliminary results indicate that association mapping to identify molecular markers associated with phenotypic qualities is possible with watermelon lines
Analyses of population structure and genetic diversity among Turkish watermelons
No full text10th EUCARPIA Meeting on Genetics and Breeding of Cucurbitaceae -- OCT 15-18, 2012 -- Antalya, TURKEYWOS: 000345687100051…European Assoc Res Plant Breeding, Cukurova Univ, Minis Food, Agr & Livestock, Turkish Sci & Technol Council, Antalya Tarim, Manier Seed, Yuksel Seed, Syngenta, AG Seed, Fito Seed, Multi Seed, Nunhems, Rijk Zwaan, Bati Akdeniz Agr Res Inst, Alata Hort Res Sta
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