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ARS Home » Southeast Area » Mayaguez, Puerto Rico » Tropical Crops and Germplasm Research » Research » Publications at this Location » Publication #356857

Research Project: Genetic Improvement of Stress Tolerance in Common Bean through Genetic Diversity and Accelerated Phenotyping

Location: Tropical Crops and Germplasm Research

Title: CGE biplot analysis of yield stability for andean dry bean accessions grown under different abiotic stress regimes in Tanzania

Author
item MNDOLWA - Washington State University
item MSOLLA, SUSAN - Sokoine University Of Agriculture
item Porch, Timothy - Tim
item Miklas, Phillip - Phil

Submitted to: African Crop Science Journal
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/23/2019
Publication Date: 8/23/2019
Citation: Mndolwa, Msolla, S.N., Porch, T.G., Miklas, P.N. 2019. CGE biplot analysis of yield stability for andean dry bean accessions grown under different abiotic stress regimes in Tanzania. African Crop Science Journal. 27: 413-425.

Interpretive Summary: Large seeded Andean dry beans (Phaseolus vulgaris L.) are the most preferred common bean market classes in Africa. However, low soil fertility and increasing drought stress conditions are among the challenges faced by farmers in this region. The purpose of this study was to identify Andean genotypes with yield stability and to identify the best environments to select for this trait. A statistical analysis called GGE-Biplot analysis was used to examine 183 Andean bean genotypes in Tanzania for yield stability in field trials conducted over two years and at three locations. The results of the study indicate significant environment, genotype and genotype x environment effects on seed yield. The environment explained 46%, the genotype 20%, and GE 34% of the total variation. The Andean genotypes ADP-102, ADP-220, ADP-276, and ADP-648, were stable across environments and can be recommended for general adaptation. An individual location for selection for yield stability was not identified, supporting the continued need for multiple test sites. These results will be useful both for the recommendation of cultivars and breeding lines for use by farmers in Tanzania, and to inform breeding programs regarding superior selection environments and genotypes for common bean improvement.

Technical Abstract: Large seeded Andean dry beans (Phaseolus vulgaris L.) are most preferred in Africa. However, low soil fertility and increasing drought stress conditions due to climate change are among the challenges faced by farmers in this region. The purpose of this study was to identify Andean genotypes with yield stability and to identify the best environments to select for this trait. GGE-Biplot analysis was used to examine 183 Andean bean genotypes in Tanzania for yield stability. Experimental designs were randomized complete blocks with two replications. Results indicated significant environment (E), genotype (G) and genotype x environment (GE) effects on seed yield. The environment explained 46%, genotype 20%, and GE 34% of the total (G + E + GE) variation. Two principal components explained 41.21% (PC1) and 26.35% (PC2) of GGE sum of squares. The Andean genotypes ADP-102, ADP-220, ADP-276, and ADP-648, were stable across environments and can be recommended for general adaptation. An individual location for selection for yield stability was not identified, supporting the continued need for multiple test sites.