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Genotype-by-Environment Interaction in tepary bean (Phaseolus acutifolius A. Gray) for seed yield

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Title Genotype-by-Environment Interaction in tepary bean (Phaseolus acutifolius A. Gray) for seed yield
 
Creator Mwale, Saul Eric
Shimelis, Hussein
Nkhata, Wilson
Sefasi, Abel
Fandika, Isaac
Mashilo, Jacob
 
Subject genotypes
drought
genotype-environment interaction
phaseolus acutifolius
yield stability
additive main effect and multiplicative interaction; best linear unbiased predictors
 
Description Genotype-by-environment (GEI) analysis guides the recommendation of best-performing crop genotypes and production environments. The objective of this study was to determine the extent of GEI on seed yield in tepary bean for genotype recommendation and cultivation in drought-prone environments. Forty-five genetically diverse tepary bean genotypes were evaluated under non-stressed and drought-stressed conditions for two seasons using a 9 × 5 alpha lattice design with three replications in four testing environments. Data were collected on seed yield (SY) and days to physiological maturity (DTM) and computed using a combined analysis of variance, the additive main effect and multiplicative interaction (AMMI), the best linear unbiased predictors (BLUPs), the yield stability index (YSI), the weighted average of absolute scores (WAASB) index, the multi-trait stability index (MTSI), and a superiority measure. AMMI analysis revealed a significant (p < 0.001) GEI, accounting for 13.82% of the total variation. Genotype performance was variable across the test environments, allowing the selection of best-suited candidates for the target production environment. The environment accounted for a substantial yield variation of 52.62%. The first and second interaction principal component axes accounted for 94.8 and 4.7% of the total variation in the AMMI-2 model, respectively, of surmountable variation due to GEI. The AMMI 2 model family was sufficient to guide the selection of high-yielding and stable genotypes. Based on best linear unbiased predictors (BLUPs), yield stability index (YSI), superiority measure (Pi), and broad adaptation, the following tepary bean genotypes were identified as high-yielding and suited for drought-prone environments: G40138, G40148, G40140, G40135, and G40158. The selected tepary bean genotypes are recommended for cultivation and breeding in Malawi or other related agroecologies.
 
Date 2023-01-01
2023-11-02T07:47:30Z
2023-11-02T07:47:30Z
 
Type Journal Article
 
Identifier Mwale, S.E.; Shimelis, H.; Nkhata, W.; Sefasi, A.; Fandika, I.; Mashilo, J. (2023) Genotype-by-Environment Interaction in tepary bean (Phaseolus acutifolius A. Gray) for seed yield. Agronomy 13(1): 12. ISSN: 2073-4395
2073-4395
https://hdl.handle.net/10568/132656
https://doi.org/10.3390/agronomy13010012
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 12
application/pdf
 
Publisher Multidisciplinary Digital Publishing Institute
 
Source Agronomy