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Yield Stability of Winter Wheat ( Triticum sp.) Cultivars and Lines
Author(s) -
ÖZgen M.
Publication year - 1991
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1991.tb00921.x
Subject(s) - cultivar , yield (engineering) , gene–environment interaction , agronomy , stability (learning theory) , winter wheat , linear regression , regression analysis , mathematics , biology , genotype , statistics , computer science , biochemistry , materials science , machine learning , gene , metallurgy
The purpose of this study was to compare responsiveness to environment as well as the stability of newly developed promising lines with traditional commercial cultivars. Subject research was conducted in Ankara between 1983‐1989 on common and durum wheat cultivars and lines. Regression coefficient (b) was used as the criterion of genotypes' responsiveness to environment whereas deviation from regression (S 2 d) and coefficient of determination (r 2 ) were used as stability parameters. Each experiment year was regarded as an environment and yield average of each year was used as the environmental index. In consequence of the research, it was determined that new varieties with high yield, adaptable to diverse environments could be developed by means of hybridizations between parents having different genetic characteristics which were provided from diverse ecological regions.