Genotype x environment interaction and yield stability analysis of mung bean (Vigna radiata (L.) Wilczek) genotypes in Northern Ethiopia

Abstract

The experiment was conducted from 2009–2011 cropping seasons. Six mung bean genotypes viz. SML-668, Black bean, Bored, Local Gofa, SML-32 and Local 2-Sheraro were evaluated to early maturing and high yielding genotypes and the design was RCBD with three replications. The combined analysis of variance reviled that there was highly significant variation (p < 0.01) of grain yield among the genotypes, environments and genotype by environment interaction. The genotypic, environmental and the genotype x environment interaction (GIE) accounted about 30.47%, 45.01% and 11.59% of the total variation. The average grain yield of the genotypes was 2008.17 kg/ha. The highest and the lowest mean yield was obtained from SML-668 (2536.47 kg/ha) and SML-32 (1773.59 kg/ha) respectively. The AMMI bi-plot also depicted that, SML-668 and SML-32 were the high yielding and low yielding genotype, respectively. Similar to the AMMI bi-plot, the GGE bi-plot also confirmed that SML-668 was the winning genotype in most of the environments; whereas, SML-32 and local 2-sheraro, were the low yielding genotypes in some or all of the environments. E1, E2 and E6 are discriminating environments and declared as the most representative than E3, E4 and E5. Generally, SML-668 was the ideal genotype with higher mean yield and relatively good stability; Local-2 Sheraro was the moderately good yielding genotype and the most unstable genotype; Whereas, SML-32 was the poorly yielding and unstable genotype.

Keywords:

• AMMI bi-plot
• Mung bean
• Genotype x Environment Interaction (GEI)
• GGE bi-plot
• stability

PUBLIC INTEREST STATEMENT

In Ethiopia, legume crops are the second most important next to cereals in area coverage and production. Mung bean, a warm season legume crop, is grown mainly for its edible seeds. In Ethiopia, farmers in some moisture stress areas of Southern Ethiopia, Amhara, Tigray and in some parts of Oromya have been producing mung bean to supplement their protein needs and also to harvest reasonable yield during cropping seasons of insufficient rainfall. This study was conducted so as to identify early maturing and high yielding mung bean varieties and the finding of this study showed a variety named SML-668 with higher mean yield and relatively good stability is the ideal variety for the moisture stress areas. Hence, having such early maturing varieties which can tolerate climate variability are important for farmers in the dry land areas.

Competing Interests

The authors declare that they have no competing of interests.

Acknowledgements

The authors would like to acknowledge Tigray Agricultural Research Institute (TARI) for the financial support and deepest thankfulness goes to crop researchers in HuARC for their tireless effort in implementing the research activity.

Cover Image

Source: Author.

Additional information

Funding

The authors did not receive any direct funding for this research work.

Notes on contributors

Fiseha Baraki

The research group is engaged on lowland legume and oil crops research. The team is mainly working on evaluation and development of early maturing and high yielding mung bean varieties for the moisture stress areas in Northern Ethiopia. The team is interested in mung bean germplasms collection and characterization, study of biotic and abiotic stresses in mung bean production, and finally enhancing mung bean productivity and quality in the mung bean growing areas.