Journal of Applied Biosciences (J. Appl. Biosci.) [ISSN 1997 - 5902]
Volume 80: 7093 - 7101 Published August 31, 2014
Genotype by Environment Interaction (G x E) and Grain Yield Stability Analysis of Ethiopian Linseed and Niger Seed Varieties
Abeya Temesgen1, 2, Kassa Mammo1 and Dagnachew Lule11 Bako Agricultural Research Center, P.O. Box 03, Bako, Ethiopia
2 corresponding author present address: University of Queensland, Queensland Alliance for Agriculture and Food Innovations (QAFFI), Qld 4343, Australia,
Corresponding Author Tel.: +61478834077 e-mail: abeya.tefera@uqconnect.edu.au
Original submitted in on 18th June 2014. Published online at www.m.elewa.org on 31st August 2014. http://dx.doi.org/10.4314/jab.v80i1.1
ABSTRACT
General
Background: Niger seed [(Guizotia abyssinica (L.F.) Cass.), 2n = 30]
and Linseed [(Linum usitatissimum L.), n=15] are indigenous oil crops
of Ethiopia. Over many years, there are a few Linseed and Niger seed
varieties developed and released through intensive breeding and
genetics research program in Ethiopia. However, whether these varieties
are stable, adaptable to the environments of Western Ethiopia and
similar agro-ecologies are not clear.
Objectives: The objectives of the study were to (i) assess genotype by environment interaction (G x E) and (ii) identify stable and adaptable Linseed and Niger seed varieties for specific and wide adaptions.
Materials and methods: All Niger seed and Linseed released varieties of Ethiopia between the years 1984 and 2008 were tested for multi-locations and years. Independent experiments of linseed and Niger seed varieties were evaluated in Randomized Complete Block Design replicated three times. Eight varieties of Linseed with one local variety were evaluated at Arjo, Gute and Shambu locations. In addition, five Niger seed varieties including one local variety were tested at Bako, Gute and Shambu locations.
Summary of the result and application of the findings: The seed yields ranged between 0.898 tons/ha and 1.575 tons/ha for Linseed and between 0.600 tons ha-1 and 0.690 tons ha-1 for Niger seed. Analysis of variance using additive main effects and multiplicative interactions (AMMI) model revealed significant differences (p≤0.01) for genotype, environment, genotype x environment interaction and interaction principal component (IPCA1) for Linseed, while only environment was found to be significantly different for Niger seed. Based on AMMI analysis, Kulumsa-1 was the best yielding, stable and widely adapted, while CI-1525 and Berene were high yielding but unstable and specifically adapted Linseed varieties to high yielding environments. Belay 96, Chilalo, Tole and CI-1652 were moderately stable and adapted to high yielding environments. Among Niger seed varieties, Shambu-1 and Esete-1 had comparable seed yield with moderately stable for the tested environments whereas Kuyu and local variety were unstable and not adopted to the testing environments.
Key words/phrases: adapted
variety, Additive main effect and multiplicative interaction (AMMI),
genotype x environment (G x E) interaction, stable variety
Objectives: The objectives of the study were to (i) assess genotype by environment interaction (G x E) and (ii) identify stable and adaptable Linseed and Niger seed varieties for specific and wide adaptions.
Materials and methods: All Niger seed and Linseed released varieties of Ethiopia between the years 1984 and 2008 were tested for multi-locations and years. Independent experiments of linseed and Niger seed varieties were evaluated in Randomized Complete Block Design replicated three times. Eight varieties of Linseed with one local variety were evaluated at Arjo, Gute and Shambu locations. In addition, five Niger seed varieties including one local variety were tested at Bako, Gute and Shambu locations.
Summary of the result and application of the findings: The seed yields ranged between 0.898 tons/ha and 1.575 tons/ha for Linseed and between 0.600 tons ha-1 and 0.690 tons ha-1 for Niger seed. Analysis of variance using additive main effects and multiplicative interactions (AMMI) model revealed significant differences (p≤0.01) for genotype, environment, genotype x environment interaction and interaction principal component (IPCA1) for Linseed, while only environment was found to be significantly different for Niger seed. Based on AMMI analysis, Kulumsa-1 was the best yielding, stable and widely adapted, while CI-1525 and Berene were high yielding but unstable and specifically adapted Linseed varieties to high yielding environments. Belay 96, Chilalo, Tole and CI-1652 were moderately stable and adapted to high yielding environments. Among Niger seed varieties, Shambu-1 and Esete-1 had comparable seed yield with moderately stable for the tested environments whereas Kuyu and local variety were unstable and not adopted to the testing environments.
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