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Öğe Effect of auxin type and concentrations in different media on the callus induction and shoot formation of crested wheatgrass (Agropyron cristatum (L.) Gaertn)(Diagnosis Press Ltd, 2008) Can, E.; Celiktas, N.; Hatipoglu, R.Effects of different medium (LS and SH).supplemented with various auxin concentrations (2, 4, 6 and 8 mg. l(-1)) of dicamba (3,6-dichloro-2metoxibenzoic acid) and picloram (4-amino-3,5,6-trichloropicolinic acid) on the callers induction, direct shoot foramtion rate and callus weight from young inflorescences crested wheatgrass (Agropyron cristatum (L.) Gaertn). The result of the study showed that callus induction rate (`%), shoot formation (%) and callus weight (mg/per Petri dishes) the young inflorescences were signficantly; affected by medium, auxin and auxin concentrations. Depending on the medium, mean callus,induction rate,.shoot formation and callus weight (mg/per Petri dishes) varied from 18% -18.8%, 8.6% - 62.5%, 11.4 - 16.4 mg, respectively Callus induction,.shoot formation rates and callers weight were also significantly influenced by the auxin ripe and auxin concentrations. The highest callus induction rate and callers weight were obtained from the LS medium containing 4 mg. P t(-1) dicamba. The highest direct shoo! formation rate was obtained from the SH medium containing 2 mg. P of picloram..Öğe Effect of inflorescence length on the callus induction and plant regeneration in orchardgrass (dactylis glomerata l.)(2003) Çeliktas, N.; Can, E.; Hatipoglu, R.This study was carried out to determine the effect of inflorescence length on callus induction and plant regeneration in Orchardgrass (Dactylis glomerata L.). In the study, the inflorescences with different length (2–25 mm) isolated from the ecotype with a good in-vitro regeneration capacity were cultured on LS medium supplemented with 5 mg?1 2,4-D. Both callus induction and directly shoot regeneration from the inflorescences of orchard-grass were observed during the investigation. Callus induction rates varied from 50% to 84.5% depending on the inflorescence length. The highest callus weight per inflorescence was obtained from the inflorescence with 11–15 mm length. The inflorescences being longer than 15 mm produced lower callus weight than those being shorter than 15 mm. The highest regeneration rate (4.4 plantlets per inflorescence) was obtained from the inflorescences with the 11–15 mm length. Increasing the inflorescence length up to 20 mm decreased the regeneration rate. Considering the results of study, it was concluded that the inflorescences being yellowish in color and 6–20 mm length could be used as explant for an acceptable regeneration rate. © 2003 Taylor and Francis Group, LLC.Öğe Effects of genotype and concentrations of dicamba on callus induction and plant regeneration from young inflorescences of perennial ryegrass (lolium perenne l.)(2004) Can, E.; Celiktas, N.; Hatipoglu, R.; Yilmaz, S.; Avci, S.This study was carried out to determine the effects of genotypes and dicamba concentrations (2.5, 5, 7.5 and 10 mg?1) on the callus induction and plant regeneration from the segments of young inflorescences cultured on the LS-medium in perennial ryegrass (Lolium perenne L). The result of the study showed that callus induction rate, callus weight per petri dish and plant regeneration from the young inflorescences were significantly affected by the genotypes. Depending on the genotypes, callus induction rate, callus weight mg/petri dish and number of regenerates per inflorescence segment varied from 20.3 %-67.2 %, 54.4–118.1, 0.797–2.719 respectively. Callus and shoot induction rates, callus weight and regeneration rate were also significantly influenced by the dicamba concentrations. The segments cultured on the LS medium containing 5 mg?1 of dicamba gave the highest values of callus induction rate (77.1 %), shoot induction rate (66.6 %), callus weight (168.2 mg/petri dish) and regeneration rate (3.458 regenerates per segment). © 2004 Taylor and Francis Group, LLC.Öğe EFFECTS OF GENOTYPE AND PICLORAM CONCENTRATIONS ON CALLUS INDUCTION AND PLANT REGENERATION FROM IMMATURE INFLORESCENCE OF SPRING BARLEY CULTIVARS (HORDEUM VULGARE L.)(Diagnosis Press Ltd, 2008) Sener, O.; Can, E.; Arslan, M.; Celiktas, N.The effects of different picloram (4-amino-3,5,6-trichloropicolinic acid) concentrations (2.5, 5, 7.5 and 10 mg. l(-1)) in the LS (Linsmaier and Skoog, 8) medium of immature inflorescences taken from four barley (Hordeum vulgare, L.) cultivars were investigated. The result of the study showed that callus induction rate, shoot induction rate, callus weight and plain regeneration front the affected by the genotypes. There was a significant interaction between genotype and immature inflorescence were significantly of picloram concentrations. Depending on the genotypes, mean callus induction rate, mean shoot induction, mean callus weight (mg/petri dishes) and number of regenerates (per inflorescence segment) varied from 0.0-39.1%, 12.5-29.7%, 0.0-150.3 mg and 0.2-1.5 respectively. Mean callus and mean shoot induction rates, mean callus weight and mean regeneration rate were also significantly influenced by the picloram concentrations. The segments cultured on the LS medium containing 7.5 mg l(-1) of picloram gave the highest values of callus induction rate (31.3%), shoot induction rate (40.6%) and plant regeneration (1.2 regenerates per segment). In this study only albino plantlets were obtained.Öğe Effects of genotype and picloram concentrations on callus induction and plant regeneration from immature inflorescence of spring barley cultivars (hordeum vulgare l.)(2008) Şener, O.; Can, E.; Arslan, M.; Çeliş, N.The effects of different picloram (4-amino-3,5,6-trichloropicolinic acid) concentrations (2.5, 5, 7.5 and 10 mg. l??) in the LS (Linsmaier and Skoog, 8) medium of immature inflorescences taken from four barley (Hordeum vulgare L.) cultivars were investigated. The result of the study showed that callus induction rate, shoot induction rate, callus weight and plant regeneration from the immature inflorescence were significantly affected by the genotypes. There was a significant interaction between genotype and picloram concentrations. Depending on the genotypes, mean callus induction rate, mean shoot induction, mean callus weight (mg/petri dishes) and number of regenerates (per inflorescence segment) varied from 0.0–39.1%, 12.5–29.7%, 0.0–150.3 mg and 0.2–1.5 respectively. Mean callus and mean shoot induction rates, mean callus weight and mean regeneration rate were also significantly influenced by the picloram concentrations. The segments cultured on the LS medium containing 7.5 mg. l?? of picloram gave the highest values of callus induction rate (31.3 %), shoot induction rate (40.6%) and plant regeneration (1.2 regenerates per segment). In this study, only albino plantlets were obtained. © 2008 Taylor and Francis Group, LLC.Öğe NEW MULTIVARIATE EMPIRICAL PREDICTION EQUATION FOR RELATIVE FEED VALUE OF NATIVE GRASSES(Aloki Applied Ecological Research And Forensic Inst Ltd, 2020) Celiktas, N.; Can, E.; Kaya, S.; Atis, I; Hatipoglu, R.; Ertekin, IRelative feed value and structural mineral differentiation of native grasses and their relationships at different plant growth stages were studied to create a more informative multivariate model to predict relative feed value. The hierarchical clustering grouped the species and their growth stages under six distinct categories with their average relative feed values of 122.6, 108.6, 99.6, 90.3, 80.9 and 71.5. The principal component analyses for the relative feed value and the mineral composition of native grasses was efficient to classify the forages with the total explained variation of 63.69% with the first two principal components. The most important predictors for relative feed value were determined as nitrogen and potassium contents of the native grasses according to beta coefficients from the partial least square regression analyses. Three partial least square regression based new empirical equations for predicting the relative feed value were constructed by using the forage nitrogen content. The coefficients of determination (R-2) and the root mean square error of prediction (RMSEP) for the equations were 0.92, 0.35, 0.81 and 2.17, 11.29, 5.88, respectively. The Fisher's F test manifested that the actual and the predicted relative feed values were not different (P>0.05) for all three equations.Öğe Twin or narrow-row planting patterns versus conventional planting in forage maize production in the Eastern Mediterranean(Akademiai Kiado Zrt, 2008) Yilmaz, S.; Erayman, M.; Gozubenli, H.; Can, E.Producing forage maize (Zea mays L.) in twin-row planting pattern has been attempted in past years. This research was performed to determine effects of planting patterns and densities on yields of forage maize hybrids. We also examined other plant characteristics associated with forage yield under second crop conditions in Hatay, East Mediterranean region of Turkey, during 2003 and 2004. The experimental design was a randomized complete block design in a split-split-plot arrangement with three replications. The planting patterns of twin row (55:20 cm), conventional row (75 cm) and narrow row (50 cm) were main plots, the plant densities (80,000, 100,000 and 120,000 plants ha(-1)) were split-plots, and the hybrids (PR-1550, MAVERIK and DK-585) were split-split plots. Forage and dry matter yields were significantly affected by planting patterns, plant densities and maize hybrids. Our results revealed the advantage of twin-row planting pattern over conventional and narrow row plantings at all plant densities. Twin row planting out-yielded conventional row (16% more forage and 10.2% more dry matter yield) and narrow-row (7.9% more forage and 5.9% more dry matter yield) plantings. Twin-row planting pattern may be a profitable production technique for forage maize producers.
