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Öğe Determination of Variability for Grain Yield and Quality Traits in Gamma-Ray Irradiated Bread Wheat Populations(Bitki Islahçıları Alt Birliği, 2021) Korkut, Kayıhan; Başer, İsmet; Bilgin, Oğuz; Balkan, Alpay; Deviren, BirolThe s tudy was carried out in the experimental area of the Field Crops Department, Faculty of Agriculture, Namik Kemal University in the growing season of 2011-12. In the s tudy, grain yield and its components and some quality traits such as 1000 grain weight, wet gluten content, gluten index, sedimentation value and protein content were inves tigated. The results exhibited significant differences among the tes ted genotypes, for all s tudied characters except spike length, indicating genetic variation among them. The genetic variation was higher for grain yield and its components when compared with quality characteris tics. These differences show that the effects of increasing gamma irradiation are not sys tematically negative for plant height, while positive for all other characters in comparison with controls. In general, it is unders tood that the highes t percent changes are achieved in 200 and 250 Gy of gamma radiation doses for yield components, while are in 300-350 Gy for the quality characteris tics. The values of phenotypic coefficient of variation PCV were slightly higher than their corresponding values of GCV for all traits. Moderate es timates of genotypic coefficient of variation GCV were obtained by grain yield (12.50%), gluten content (11.20%) and grain weight per spike (10.20%), respectively. Low es timates of GCV (less than 10) were recorded for the other characters inves tigated. The h2 values ranged from 37.3%, for sedimentation value, and 86.6%, for plant height, while the values of GA% ranged between 0.09 and 593.0.5% at 10% selection intensity for grain weight per spike and grain yield, respectively. The high values of heritability coupled with high values of genetic advance (%) were recorded by plant height, indicates the importance of the additive gene effects, so, selection would be effective in early generations for the trait. The high values of heritability coupled with moderate values of genetic advance (%) for harves t index and gluten index indicate selection would be a delay in later generations.Öğe Heterotic grouping of wheat hybrids based on general and specific combining ability from line x tester analysis(Peerj Inc, 2024) Deviren, Birol; Bilgin, Oguz; Kutlu, ImrenThe most important step in plant breeding is the correct selection of parents, and it would be wise to use heterotic groups for this. The purpose of this study is to analyse yield and its components as well as genetic diversity in line x tester wheat populations. It also seeks to present a coherent framework for the isolation of early superior families and the development of heterotic groups in bread wheat. F1 1 and F2 2 generations of 51 genotypes, including 36 combinations between 12 lines and three testers and 15 parents, were evaluated for yield and its components in a three-replication experiment according to the randomized block design. Line x tester analysis of variance, general and specific combining abilities, heterosis, heterobeltiosis and inbreeding depression were calculated. Heterotic groups created based on general and specific combining abilities were compared with each other. The results showed that there was sufficient genetic variation in the population and that further genetic calculations could be made. The selections made based on general and specific combining abilities, heterosis values and average performance of genotypes without heterotic grouping indicated different genotypes for each feature. The creation of heterotic groups made it possible to select genotypes that were superior in terms of all the criteria listed. It was concluded that heterotic groups created based on specific combining abilities may be more useful for breeding studies.Öğe Improvement of Grain Yield and Yield Associated Traits in Bread Wheat (Triticum aestivum L.) Genotypes Through Mutation Breeding Using Gamma Irradiation(Namık Kemal Üniversitesi, 2019) Balkan, Alpay; Bilgin, Oğuz; Başer, İsmet; Balaban Göçmen, Damla; Demirkan, Alp Kayahan; Deviren, BirolThe present research was conducted to evaluate the M1, M2, M3 and M4 bread wheat (Triticum aestivum L.) mutant populations for yield and yield related traits during 2010-11, 2011-12, 2012-13 and 2013-14 at Tekirdağ ecological conditions. Three wheat genotypes were treated with different levels of gamma rays (100 Gy, 200 Gy, 300 Gy, 400 Gy, 500 Gy and Control). The mutated plants were evaluated along with parental lines (control) for grain yield (GY) and its contributing traits such as plant height (PH), spike length (SL), the number of spikelets per spike (NSPS), the number of grains per spike (NGPS), grain weight per spike (GWPS), harvest index (HI) and thousand grain weight (TGW) under field conditions. The results obtained from the present study showed that the genotypes significantly and variably differed in their response for various traits at different gamma rays doses. The traits such as PH, TGW and grain yield (GY) showed generally reduction with higher gamma irradiation doses as compared to low doses, while mutagenic treatments shifted the mean values mostly towards the negative direction in the other yield components. But, the negative or positive shifts were not unidirectional or equally effective for all the traits. These findings suggested that the variability could be induced through the use of gamma irradiations in bread wheat. Some of the traits showed improvement due to the induced mutations could be used in future wheat breeding programs. The differences in mean values and the nature of variability observed in M2 indicated a possible preference of selection in M3 generation.Öğe Improvement of grain yield and yield associated traits in bread wheat (Triticum aestivum L.) genotypes through mutation breeding using gamma irradiation(Namik Kemal University - Agricultural Faculty, 2019) Balkan, Alpay; Bilgin, O?uz; Başer, Ismet; Balaban Göçmen, Damla; Demirkan, Alp Kayahan; Deviren, BirolThe present research was conducted to evaluate the M1, M2, M3 and M4 bread wheat (Triticum aestivum L.) mutant populations for yield and yield related traits during 2010-11, 2011-12, 2012-13 and 2013-14 at Tekirda? ecological conditions. Three wheat genotypes were treated with different levels of gamma rays (100 Gy, 200 Gy, 300 Gy, 400 Gy, 500 Gy and Control). The mutated plants were evaluated along with parental lines (control) for grain yield (GY) and its contributing traits such as plant height (PH), spike length (SL), the number of spikelets per spike (NSPS), the number of grains per spike (NGPS), grain weight per spike (GWPS), harvest index (HI) and thousand grain weight (TGW) under field conditions. The results obtained from the present study showed that the genotypes significantly and variably differed in their response for various traits at different gamma rays doses. The traits such as PH, TGW and grain yield (GY) showed generally reduction with higher gamma irradiation doses as compared to low doses, while mutagenic treatments shifted the mean values mostly towards the negative direction in the other yield components. But, the negative or positive shifts were not unidirectional or equally effective for all the traits. These findings suggested that the variability could be induced through the use of gamma irradiations in bread wheat. Some of the traits showed improvement due to the induced mutations could be used in future wheat breeding programs. The differences in mean values and the nature of variability observed in M2 indicated a possible preference of selection in M3 generation. © This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (https://creativecommons.org/licenses/by-nc/4.0/). Tekirda? 2019.Öğe Milenyum öncesi ve sonrası tescil edilmiş ekmeklik buğday (Triticum aestivum L.) çeşitlerinde tane verimi ve kalitesi için genotip x çevre interaksiyonlarının gge biplot yöntemiyle incelenmesi(Tekirdağ Namık Kemal Üniversitesi, 2024) Deviren, Birol; Bilgin, OğuzBu araştırma, Trakya Bölgesi'nde 2000 yılı öncesi ve sonrası tescilli veya üretim izinli yirmi beş ekmeklik buğday genotipi ile üç yıl süresince ve üç lokasyonda olmak üzere toplam dokuz çevrede tesadüf blokları deneme desenine göre 3 tekrarlamalı olarak yürütülmüştür. Araştırma ile tane verimi ve bitki boyu, başak uzunluğu, başakta başakçık sayısı, başakta tane sayısı, başakta tane ağırlığı, hasat indeksi gibi verim komponentleri ile bin tane ağırlığı, hektolitre ağırlığı, protein oranı, gluten oranı, gluten indeksi, sedimantasyon değeri gibi kalite parametreleri için GGE biplot yöntemiyle değerlendirilmelerin yapılması amaçlanmıştır. GGE Biplot yöntemi ile beraber, stabilite analizlerinden regresyon katsayısı, regresyon hattından sapmaların varyansı, varyasyon katsayısı, ekovalans stabilite indeksi, belirtme katsayısı, stabilite varyansı ve geometrik adaptabilite indeksi gibi parametrik stabilite ile S_i^((1-4)) ve ?NP?^((1-4) ) gibi parametrik olmayan stabilite analizlerine ilişkin değerlendirmeler de çalışmada yer almıştır. Milenyum öncesi tescilli veya üretim izinli çeşitlere karşılaştırıldığında, sonrasındakilerin daha yüksek tane verimi ile daha düşük bitki boyu ve bin tane ağırlığı ortalamalarına sahip olduğu dikkat çekmektedir. Özellikle birleştirilmiş çevre ortalamalarına göre en yüksek tane verimi Bora çeşidinde elde edilmiş, bu çeşidi sırasıyla Rumeli, Sarı Mustafa, Selimiye, Tekirdağ çeşitleri takip etmiştir. Bu çeşitlerin stabilitelerinin düşük ve çevre seçiciliğinin olduğu görülmüştür. Bora ile Rumeli çeşitlerinin iyi çevre koşullarına, Selimiye ve Tekirdağ çeşitlerinin ise kötü çevre koşullarına adaptasyonunun yüksek olduğu anlaşılmıştır. Hem üç lokasyonda ayrı ayrı hem de birleştirilmiş protein oranı sonuçlarına göre ise Enargo, Bezostaja-1, Rumeli, Murat-1, Saraybosna, Delebrad-2, Flamura-80, Esperia çeşitleri en yüksek performansı göstermiş ve bu sekiz çeşit içinde Bezostaja-1, Delebrad-2 çeşitlerin stabilitesi yüksek, diğer altı çeşidin ise stabiliteleri düşük bulunmuştur.
