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Validation of the regulations for common bean (Phaseolus vulgaris l.) cultivar recommendations by computational simulation with experimental data

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Abstract

The value of cultivation and use (VCU) tests are required for registration of new cultivars. The rules for conducting VCU tests were very restrictive as they require many tests to register the new cultivar of common bean (Phaseolus vulgaris). The standard rule has been relaxed since 2010 and was considers the regionalization of Brazil in edaphoclimatic regions (ECR). Thus, ten environments are currently accepted for regions I (South) and II (Central), and six environments for Region III (Northeast). Of which three environments are required per sowing season for the season in which the cultivar is to be indicated. The aim was to validate the number of environments for cultivar recommendation by computational simulation in three edaphoclimatic regions (ECR) in Brazil using field data from a 17-year period. The algorithm was created to simulate scenarios with different numbers of environments randomly sampled and to compares the genotype classified in the simulated scenarios to the ones classified in the complete multi-trial analysis. Components of variance, selective accuracy (SA), and relative grain yield were estimated for each simulated scenario. We find a high percentage of matches between the best-classified genotypes in the simulated scenarios with fewer environments when we compare to the complete analysis. The percentage of matches rises as the number of environments increases. However, after 90% of SA is achieved the increase of the environments doesn’t necessary. Thus, eight environments for ECR1 and ECR2 and six for ECR3 are in the mean point of the increase rate and are above 90% of SA. This sample size is adequate for common bean cultivar recommendations. Thus, it is concluded that the number of environments currently accepted for registration of new cultivars is capable of indicating the superior genotypes.

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Abbreviations

CMA:

complete multi-trial analysis

FYG:

frequency of the highest yield genotype

ECR:

edaphoclimatic region

ECR1:

South-central region

ECR2:

Central region

ECR3:

Northeast region

Embrapa:

Brazilian agricultural research corporation

G × E:

Genotype by environment interaction

LMM:

Linear mixed model

MAPA:

Brazilian ministry of agriculture

NID:

Normally and independently distributed residues

REML:

Restricted maximum likelihood

RNC:

Brazilian national cultivar registry

RGY:

Relative grain yield

SA:

Selective accuracy

VCU:

Value for cultivation and use trial

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Acknowledgements

We thank the entire common bean breeding staff at Embrapa, especially the research assistants and field workers, and thank Capes/the Brazilian Ministry of Education, for granting a scholarship to the first author.

Funding

The authors declare that no funds, grants, or other support were received during the preparation of this manuscript. The authors have no relevant financial or non-financial interests to disclose.

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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Luis Claudio de Faria, Helton Santos Pereira, Thiago Lívio Pessoa Oliveira de Souza, Leonardo Cunha Melo, Patrícia Guimarães Santos Melo and Matheus Souza de Barros. The first draft of the manuscript was written by Matheus Souza de Barros and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Matheus S. Barros.

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Barros, M.S., Melo, P.G.S., de Faria, L.C. et al. Validation of the regulations for common bean (Phaseolus vulgaris l.) cultivar recommendations by computational simulation with experimental data. Euphytica 219, 36 (2023). https://doi.org/10.1007/s10681-023-03165-6

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  • DOI: https://doi.org/10.1007/s10681-023-03165-6

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