Acta Univ. Agric. Silvic. Mendelianae Brun. 2014, 62(5), 1049-1056 | DOI: 10.11118/actaun201462051049
Stability Analysis of Durum Wheat Genotypes by Regression Parameteres in Dryland Conditions
- 1 Dryland Agricultural Research Institute, Gachsaran Station, Iran
- 2 Department of Agronomy and Plant Breeding, Rasht Branch, Islamic Azad University , Rasht , Iran
The objectives of this study were to estimate genotype × environment (GE) interaction effects and to determine the stable durum wheat (Triticum turgidum var. durum Desf.) genotypes for grain yield in warm winter areas of Iran. Twenty durum wheat genotypes, including 18 experimental lines and two local checks were evaluated during three cropping seasons (2004-2006) at five research sites. The combined analysis of variance indicated that the main effects of location and genotype and interaction effects of genotype × year, genotype × location and genotype × year × location were highly significant for grain yield. GE interaction was analyzed using linear regression techniques. There was considerable variation for grain yield among both genotypes and environments. Stability was estimated using the Eberhart and Russell method. Stability analysis of grain yield in different environments showed that the variance of genotypes and genotypes × environment (linear) interactions were significant. Due to the stability analysis, genotype 12 (D68-1-93A-1A//Ruff/Fg/3/Mtl-5/4/Lahn) indicated relatively minimum value for S2d and a b-value close to unity and hence, it may be considered stable for grain yield in all of the environments. The results showed that G10 (Bcr//Memo/goo) also favor for its stability in high yielding environments. The broad sense heritability was 77%, indicating selection should give a good response for grain yield.
Keywords: Durum wheat, grain yield, stability, genotype × environment (GE) interaction, heritability
Grants and funding:
The authors are grateful for the support provided by Dry Land Agricultural Research Institute of Iran. Sincere gratitude goes to other colleagues in the other Agricultural Research Stations (Khorram-Abad, Moghan, Ilam and Gonbad) for their technical assistance.
Published: December 2, 2014 Show citation
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