Pattern analysis of multi-environment yield trials in barley (Hordeum vulgare L.)

Authors : Soner YÜKSEL, Mevlüt AKÇURA

Pages : 285-295

View : 40 | Download : 8

Publication Date : 2012-06-01

Article Type : Research Paper

Abstract :Pattern analysis, cluster and ordination techniques were applied to grain yield data of 24 cultivars of 2- and 6-rowed barley insert ignore into journalissuearticles values(Hordeum vulgare L.); grown in 26 environments in Turkey during 2004-2008 to identify patterns of genotype insert ignore into journalissuearticles values(G);, environment insert ignore into journalissuearticles values(E); and genotype × environment interaction insert ignore into journalissuearticles values(GEI); in barley multi-environment trials insert ignore into journalissuearticles values(METs);. Analysis of variance showed that 86.9% of the total sum of squares was accounted for by E. Of the remaining sum of squares, the contribution of GEI was almost 9 times that of the contribution of G alone. Knowledge of environmental and cultivar classification helped to reveal several patterns of GEI. This was verified by ordination analysis of the GEI matrix. Grouping environments based on cultivar performance resulted in the separation of different types of environments. Pattern analysis confirmed 2 mega-environments in the highest similarity level and allowed the discrimination and characterization of barley cultivar adaptation. The high-yielding environments insert ignore into journalissuearticles values(Eskişehir and Konya; first mega-environment); tended to be closer to one another, suggesting that they discriminate among barley cultivars similarly, whereas low-yielding environments tended to be more diverse insert ignore into journalissuearticles values(Afyon and Uşak; second mega-environment);. Cultivars with similar patterns in performance were separated into 5 clusters. The two 6-rowed insert ignore into journalissuearticles values(Kıral-97 and Çetin-00); and two 2-rowed barley cultivars insert ignore into journalissuearticles values(Şahin-91 and Aydan hanım); with low to medium yields insert ignore into journalissuearticles values(3.60-3.84 t ha-1); contributed greatly to GEI and were highly adapted to high-yielding environments. The tall and later maturing 2-rowed barley cultivars insert ignore into journalissuearticles values(Karatay-94, İnce-04, Kalaycı-97, Özdemir-05, Tokak 157/37, and Keser); with high yields insert ignore into journalissuearticles values(4.35-4.18 t ha-1); were highly adapted to most of the environments studied.
Keywords : Key words Barley Hordeum vulgare L, , biplot analysis, cluster analysis, genotype × environment interaction