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Environmental Adaptation and Stability Relationships between Grain Yield and some Agronomic Traits in Winter Oat

Environmental Adaptation and Stability Relationships between Grain Yield and some Agronomic... This study was conducted to determine the stability of grain yield, harvest index, plant height, and panicle length and to determine the association of grain yield with these traits in winter white oat (Avena sativa L.) genotypes. The genotypes were grown in replicated tests in Ankara in 1985–1991. Each experiment year was regarded as an environment, and entry mean of each year was used as the environmental index. Stability parameters were estimated from the regression analysis as linear regression coefficient (b), deviations from regression (S2d) and coefficient of determination (r2). Genotypes differed significantly for all traits and significant genotypes X environment interactions occurred for these traits. On the basis of estimates of stability parameters, A‐24 genotype was stable for grain yield. Correlation coefficients between traits were inconsistent in good and poor environments except between grain yield and panicle length. The study suggested that these traits are differently affected by environmental changes and selection for panicle length might be effective as selection for grain yield in improving oats with high grain yield for diverse environments. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Agronomy and Crop Science Wiley

Environmental Adaptation and Stability Relationships between Grain Yield and some Agronomic Traits in Winter Oat

Journal of Agronomy and Crop Science , Volume 170 (2) – Mar 1, 1993

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References (24)

Publisher
Wiley
Copyright
Copyright © 1993 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0931-2250
eISSN
1439-037X
DOI
10.1111/j.1439-037X.1993.tb01066.x
Publisher site
See Article on Publisher Site

Abstract

This study was conducted to determine the stability of grain yield, harvest index, plant height, and panicle length and to determine the association of grain yield with these traits in winter white oat (Avena sativa L.) genotypes. The genotypes were grown in replicated tests in Ankara in 1985–1991. Each experiment year was regarded as an environment, and entry mean of each year was used as the environmental index. Stability parameters were estimated from the regression analysis as linear regression coefficient (b), deviations from regression (S2d) and coefficient of determination (r2). Genotypes differed significantly for all traits and significant genotypes X environment interactions occurred for these traits. On the basis of estimates of stability parameters, A‐24 genotype was stable for grain yield. Correlation coefficients between traits were inconsistent in good and poor environments except between grain yield and panicle length. The study suggested that these traits are differently affected by environmental changes and selection for panicle length might be effective as selection for grain yield in improving oats with high grain yield for diverse environments.

Journal

Journal of Agronomy and Crop ScienceWiley

Published: Mar 1, 1993

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