Original Research Article
Year: 2020 | Month: January | Volume: 7 | Issue: 1 | Pages: 300-305
GGE Biplot Analysis of Genotype X Environment Interaction of Cold Tolerant Green Super Rice Genotypes in Ethiopia
Abebaw Dessie, Zelalem Zewdu, Assaye Berie, Mulugeta Atnaf
Fogera National Rice Research & Training Center/Ethiopian Institute of Agricultural Research Center, Ethiopia
Corresponding Author: Abebaw Dessie
ABSTRACT
The experiment was conducted in Fogera and Shire-Maitsebri from 2016-2018 main cropping seasons with the major objectives of high yielding, cold tolerant, disease resistance and early maturing GSR rice varieties for the high altitude of lowland production system. A total of 15 GSR genotypes including two checks were used in the study. The trial was laid out in randomized complete block design with three replications with plot size of 7.5 m2. The combined analysis of variance revealed significant difference on grain yield, days to maturity, days to heading, panicle length, filled grain per panicle, plant height and thousand grains weight (P≤0.01). Three genotypes (G2, G6 and G4) showed significant difference than the standard checks on grain yield and gave grain yield advantage of 32.6 %, 27.9 % and 22.3 %, respectively. The genotype main effect plus genotype x environment interaction (GE) biplots were used to analyse and visualize pattern of the interaction component. The first two principal components (PC1 and PC2) of the GGE explained 79.34 % with PC1= 54.09 % and PC2=25.25 % of GGE sum of squares, respectively. Genotypes, G2 (Yungeng 31) and G6 (KB-2) combined both high stability performance and high mean grain yield across the test environments and characterized as an ideal genotypes and proposed for national variety release.
Keywords: GSR, cold, stability, GGE bi-plot, rice
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