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Öğe Assessing genetic diversity of some potato (Solanum tuberosum L.) genotypes grown in turkey using the AFLP marker technique(2010) Akkale C.; Yildirim Z.; Yildirim M.B.; Kaya C.; Öztürk G.; Tanyolaç B.In the present study, the level of polymorphism and the genetic relationships among 26 potato genotypes were studied by means of molecular markers using the amplified fragment length polymorphism (AFLP) technique. DNA was extracted from fresh leaves of the seedlings. Selective amplification products revealed a total of 191 polymorphic bands ranging from 8 to 45 for each combination. Scoring results were used to generate a tree in JMP software. The 26 samples formed six clades with varying number of members between one and eleven. Genetic distances among genotypes were calculated according to Jaccard's formula, in Phylip 3.0 software. According to the results of genetic distance, dendrogram showed that genotypes 6/7-4 and 6/7-2 were the closest genotypes with a genetic distance of 0.13. On the other hand, genotypes Posof-10 and Marabel were the most distinct from each other with a genetic distance value of 0.55. The AFLP marker results showed a great consistency along with their pedigrees indicating the AFLP technique as a useful tool in the calculation of genetic distance of the potato genotypes.Öğe Effect of replications on estimation of the tuber yield and plant height in potatoes(1996) Budak N.; Yildirim M.B.Tuber yield is an important selection criterion in breeding programs conducted in diverse environments. It is important to precisely measure tuber yield within a location in order to make recommendations to farmers. The number of replications that should be measured to accurately determine tuber yield and plant height, and to detect the desired difference between potato genotypes, were determined using statistical formulas and data from a total of six yield trials in three diverse environments. Despite the environment diversity, measuring tuber yield and plant height on only two replications provided a very accurate estimate of the mean for each trial and of the detectable difference between two potato genotypes.Öğe Genotype X environment interactions in potato (Solanum tuberosum L.)(1985) Yildirim M.B.; ÇaliŞkan C.F.Genotype X environment interactions were estimated for several traits in potato from a combined analysis of 11 genotypes grown at 3 locations for 2 years. Genotype X location X year and Genotype X location interactions were significant for the majority of the traits studied. Yield, reducing sugar content, dry matter content, leaf area, plant height and starch content should be tested over multiple locations and years in order to separate the genotype × environment interaction components from the total genotypic variance. © 1985 Springer.Öğe Heterosis in bread wheat(1996) Budak N.; Yildirim M.B.Values of heterosis and combining ability for seven traits were estimated in a 6 × 6 diallel population by using Method 4 of Griffing type analysis. High heterosis was found for the harvest index and yield in the cross Orsa × Ak 702. which had the best specific combining ability. In crosses involving Orso and Ak 702, Orso reduced the plant height while Ak 702 increased it. For Harvest index, plot yield, and thousand kernel weight, Genaro and Marmara 86 were the best general combiners, while Gerek 79 and Ak 702 had the best general combining ability for plant height and number of tillers, respectively.Öğe Inheritance of grain yield per plant, flag leaf width, and length in an 8 × 8 diallel gross population of bread wheat (T. aestivum L.)(Turkiye Klinikleri Journal of Medical Sciences, 2006) Dere Ş.; Yildirim M.B.The inheritance of grain yield per plant, flag leaf width, and flag leaf length was studied applying Jinks-Hayman diallel analysis in an 8 × 8 wheat cross population involving the bread wheat (T. aestivum L.) genotypes Cumhuriyet, Kaşifbey, Ziyabey, Marmara, Basribey, Malabadi, Yüregir, and Seri-82. The crosses were made by hand, without reciprocals, in field conditions from March to May 2001, and the field experiment was conducted during the October 2002 to June 2003 growing season. The analysis of data showed that the additive variance component (D) was significant for flag leaf width (P < 0.01). The dominance variance component (H1) was significant for flag leaf width and grain yield per plant. The dominance level variance component (h2) and corrected dominance variance component (H2) were significant for all 3 traits studied (P < 0.01). The Wr/Vr graphs indicated overdominance for grain yield per plant and flag leaf width, while partial dominance was inferred for flag leaf length. Flag leaf length was significantly and positively correlated with flag leaf width (r = 0.803). Yüregir × Malabadi crosses should be considered for maximizing photosynthetic area of the leaf. © TÜBİTAK.Öğe Inheritance of harvest index in a 6x6 diallel cross population of bread(1995) Yildirim M.B.; Budak N.; Arshad Y.[No abstract available]Öğe Inheritance of plant height, tiller number per plant, spike height and 1000-kernel weight in a 8x8 diallel cross population of bread wheat(2006) Dere S.; Yildirim M.B.The inheritance of plant height, tiller number per plant, spike height and 1000- kernel weight was studied using a Jinks-Hayman diallel analysis in a 8x8 wheat (Triticum aestivum L.) cross population with the following bread wheat cultivars: Cumhuriyet (1), Kasifbey (2), Ziyabey (3), Marmara (4), Basribey (5), Malabadi (6), Yüregir (7) and Seri-82 (8). The data analysis showed that the additive variance component (D) was significant for plant height, spike height and 1000- kernel weight at 1% level. The F parameter which is effect of dominant and recessive genes has a positive value for all four traits studied and was significant for plant height at 1% level. Dominance variance component (H 1 ),corrected dominance variance component (H 2 ) and dominancy level variance component (h 2 ) were significant for all four traits studied. The Wr-Vr graphs indicated overdominance can be inferred for tiller number number per plant, spike height and 1000- kernel weight while partial dominance could be inferred for plant height.Öğe Investigation of genotype X planting time interaction by using ammi statistical model in potatoes [Patateste genotip X dikim zamani i·nteraksiyonunun ammi i·statistik modeline göre i·rdelenmesi](TUBITAK, 1999) Yildirim M.B.; Budak N.; Çalişkan C.; Çaylak Ö.In studies on potato planting time, the main effects of genotype and planting time were determined by variance analysis and are discussed. However, the main specific causes of interaction were not demonstrated clearly. Five potato genotypes (Resy. 81028/1, Sultan, Granola and Yaylakizi) were planted on six different dates (January 30, February 10. February 20. February 28, March 10 and March 20) in three different years (1993, 1994 and 1995). Tuber yield data were analysed with the AMMI (Additive Main Effects and Multiplicative Interaction) statistical model. The results showed that the January 30, February 10 and March 20 planting times had similar yield ranges. Granola and Resy gave low. Sultan and 81028/1 gave high and Yaylakizi gave moderate yields. The results clearly identify the main effects of the specific genotype and planting time, causing the genotype x planting interaction.Öğe Studies on the determination of some physiological and agronomic traits used in the simulation of wheat growth [Bugday gelişmesinin simülasyonunda kullanilan bazi fizyolojik ve tarimsal özelliklerin saptanmasi üzerinde araştirmalar](1996) Arshad Y.; Yildirim M.B.14 wheat varieties arranged in randomized complete Blocks with 3 replications were grown at 2 locations for 2 years. A total of 19 traits were measured and their heritabilities were estimated by the standard variance component method. The grain yields of varieties were estimated under the ideal and stress conditions and they were compared with their actual yields. Majority of the traits studied had high heritability values. Websbread, Cumhuriyet 75, Izmir 85, Ata 81 and Gönen varieties performed in accord with simulation results under the ideal and stress conditions in terms of yield.
