The relationships of some traits in Turkish winter bread wheat landraces

Authors : Mevlüt AKÇURA

Pages : 115-125

View : 16 | Download : 10

Publication Date : 2011-04-01

Article Type : Research Paper

Abstract :In this study, 42 bread wheat pure lines obtained from 340 landraces, collected from 35 provinces of 7 regions in Turkey, and 7 modern bread wheat cultivars were evaluated under rainfed conditions in Konya, in 2005-2006 and 2006-2007 growing seasons. Experiments were conducted in a 7 × 7 lattice design in 3 replicates. Both genotype-traits insert ignore into journalissuearticles values(GT); biplot analysis and path analysis were used to investigate the relationships between grain yield and 12 traits. Applying both types of analyses to the multiple traits data revealed that GT biplot graphically displayed the interrelationships among traits insert ignore into journalissuearticles values(breeding objectives);, identified traits that are positively or negatively associated, and facilitated visual comparison trait profiles insert ignore into journalissuearticles values(strength and weakness); of genotypes, which is important for parent as well as variety selection. Vast variations existed in traits insert ignore into journalissuearticles values(number of grains m-2, harvest index, number of spikes m-2, number of grains spike-1, and weight of grains spike-1 and biological yield); and grain yield. It was found that either pure lines or cultivars with the highest grain yield had the highest biological yield, number of grain m-2, and harvest index. The results showed that pure lines combined with favorable traits G43 insert ignore into journalissuearticles values(Kars-TR15796-7);, G33 insert ignore into journalissuearticles values(Kars-TR15796-4);, G20 insert ignore into journalissuearticles values(Kütahya-TR55167-3);, and G11 insert ignore into journalissuearticles values(Kütahya-TR55212-4); can be evaluated in multi-environment trials for a candidate winter bread wheat registration trial. Some pure lines that had high quality traits G26 insert ignore into journalissuearticles values(Samsun-TR37926-3);, G45 insert ignore into journalissuearticles values(Erzurum-TR32881-6); and G49 insert ignore into journalissuearticles values(Erzurum-TR32668-1); might be good parents for enhancing quality in bread wheat. In conclusion, for the short-term improvement of Turkish bread wheat landraces may be possible through an indirect selection of the number of grain m-2 and biological yield, or direct selection for grain yield per se. In the long-run, crossing programs between indigenous and introduced exotic germplasm may be necessary for high industrial quality characters of bread wheat.
Keywords : Key words Biplot analysis, grain yield, multiple traits, path analysis, Turkey, winter bread wheat landraces