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IJSTR >> Volume 6 - Issue 11, November 2017 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Assessing The Representative And Discriminative Ability Of Test Environments For Rice Breeding In Malaysia Using GGE Biplot

[Full Text]



Yusuff Oladosu, M.Y. Rafii, Usman Magaji, Norhani Abdullah, Asfaliza Ramli, Ghazali Hussin



Genotype by Environment interaction, stability analysis, GGE biplot, test location, grain yield.



Identification of outstanding rice genotype for target environments is complicated by genotype × environment interactions. Using genotype main effect plus genotype by environment interaction (GGE) Biplot software, fifteen rice genotypes were evaluated at five locations representing the major rice producing areas in peninsula Malaysia in two cropping seasons to (i) identify ideal test environment for selecting superior rice genotype, and (ii) identify discriminative and representative ability of test locations. Genotypes, locations, years, and genotypes by environment interaction effect revealed high significant difference (P < 0.01) for number of tillers per hill, grains per panicle, grain weight per hill, and yield per hectare. Grain yield per hectare had a non-repeatable crossover pattern that formed a complex and single mega-environment. Based on the crossover pattern, a set of cultivars were selected for the whole region on the merit of mean performance and their stability analysis. The tested environments were divided into two mega-environments. An ideal test environment that measures the discriminative and representative ability of test location reveal that environment Sekinchan SC is the best environment, while Kedah KD and Penang PN can also be considered as favorable environment whereas Serdang SS and Tanjung Karang TK were the poorest locations for selecting genotypes adapted to the whole region. This study serves a reference for genotypes evaluation as well as identification of test locations for rice breeding in Malaysia.



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