Genotype-by-environment interactions of barley in the Mediterranean region

Oosterom, E J Van and Kleijn, D and Ceccarelli, S and Nachit, M M (1993) Genotype-by-environment interactions of barley in the Mediterranean region. Crop Science, 33 (4). pp. 669-674. ISSN 0011-183X

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In the Mediterranean region, progress in selection for yield in harsh environments is hampered by large environmental variation between seasons and locations. This study analyses the genotype-by-environment (GE) interaction of 36 two-rowed genotypes of barley, grown in 14 environments in Syria and North Africa. It assesses the effect of growth type (winter or spring type) and heading date on the GE interaction and determines whether or not high-yielding (HY) environments are representative of low-yielding (LY) ones. Average grain yield per environment ranged from 7 to 513 g m-2. Genotypes and environments were classified by a cluster analysis and the interaction was analysed with an additive main effects and multiplicative interaction model. Genotypes were classified into four clusters, related to their growth type and earliness of heading. Environments were clustered into HY and LY groups; this classification was related to seasonal rainfall and temperature. Medium-early heading winter types had a positive interaction with LY environments and a negative interaction with HY environments, whereas late heading genotypes (spring and winter types) had the opposite interaction pattern. Early heading spring types had above-average mean yields; the highest-yielding among them tended to have a low interaction with environments. High-yielding environments did not discriminate well between genotypes with high or low yields in LY environments, and may thus have limited value for yield selection for LY environments. For a breeding programme aimed at improving yield in environments where favourable conditions are rare, selection for yield should be done in representative less-favourable environments

Item Type: Article
Uncontrolled Keywords: Genetic improvement; Genotype environment interaction; Mediterranean region; Yield; Hordeum vulgare; Syria; North Africa; Gramineae; Monocotyledones; Angiospermae; Spermatophyta; Asia; Africa; Environmental factor; Cereal crop
Subjects: Others
Depositing User: Ms K Syamalamba
Date Deposited: 22 Nov 2011 05:14
Last Modified: 02 Jan 2012 07:48
Official URL:
Funders: Netherlands Foundation for the Advancement of Tropical Research (WOTRO)
Acknowledgement: We are grateful to Dr. E. Acevedo for providing most of the data and to Dr. W. Erskine, Dr. J. Hamblin, Dr. H. Harris, Dr. J.E. Parlevliet, and Dr. J.M. Peacock for reviewing the manuscript. EJvO acknowledges the grant of the Netherlands Foundation for the Advancement of Tropical Research (WOTRO)
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