ARJASR

ISSN: 2360-7874

 Academic Research Journal of Agricultural Science and Research
 

Vol. 7(4), pp. 202-211, May 2019
DOI: 10.14662/ARJASR2019.045
Copy©right 2019
Author(s) retain the copyright of this article
ISSN: 2360-7874
http://www.academicresearchjournals.org/ARJASR/Index.htm
 

Full Length Research

Genotype x Environment Interaction and Grain Yield Stability of Sorghum [Sorghum bicolor (L.) Moench] Varieties in Oromia, Ethiopia

Gebeyehu Chala^1*, Bulti Tesso², Dagnachew Lule³ and Kebede Dessalegn⁴

¹Oromia Agricultural Research Institute, Mechara Agricultural Research Center

²Haromaya University, Alemaya, Ethiopia, ³Oromia Agricultural Research Institute, Addis Ababa, Ethiopia, ⁴Bako Agricultural Research Center, Bako, Ethiopia. ^*Corresponding author: gebeyehuchal@gmail.com

Accepted 3 May 2019

Background and justification: Ethiopia is the third largest sorghum producer in Africa next to Nigeria and Sudan. Shortage of widely adapted and stable high yielding variety is one of the major bottlenecks for production and productivity of sorghum in Ethiopia. Genotype by Environment Interaction results from a change in the relative rank of genotype performance or a change in the magnitude of differences between genotype performances from one environment to another.

Objectives: To determine the magnitude and nature of genotype by environments interaction for grain yield and also to determine the stability of sorghum varieties for grain yield and hence to identify and recommend stable high yielding variety (ies).

Material and methods: A total of 22 sorghum varieties were evaluated across five locations such as Bako, Gute, Biloboshe (Western Ethiopia), Mechara and Mieso (Eastern Ethiopia) in 2017 main cropping seasons. The trial was arranged in a randomized complete block design (RCBD) in three replications.

Summary result and application of the study: The combined analysis of variance revealed that significant effect of locations and genotype by location interactions for grain yield. This showed that, genotypes were inconsistent for grain yield across the testing locations. Birmash gave the highest grain yield with average yield of 3.5 ton ha^-1 but not widely adapted. Baji was the second high yielding variety with mean grain yield of 3.3 ton ha^-1 & better wider adaptability.  In genotype x environment interaction analysis, the result indicates that, the observed yield variations among varieties were due to the GxE effects rather than main effect of genotypes and environments. Results of ASV parameter showed that, the six relatively better stable and high yielding genotypes are Gambella-1107, Gobiye, Baji, ESH-1, IS9302 and Emahoy. Emahoy and Baji varieties were the 3^rd and 2^nd top high yielder and relatively better stable varieties as revealed by the two stability models.

Key words: ASV, Correlation, GxE Interaction, Sorghum, Stability

How to cite this article (APA Style): Gebeyehu C., Bulti T., Dagnachew L., Kebede D (2019). Genotype x Environment Interaction and Grain Yield Stability of Sorghum [Sorghum bicolor (L.) Moench] Varieties in Oromia, Ethiopia. Acad. Res. J. Agri. Sci. Res. 7(4): 202-211