Morpho-Agronomic Characterization, Sample Size, and Plot Size for the Evaluation of <i>Capsicum chinense</i> Genotypes
Silfran Rogério Marialva Alves,
Ricardo Lopes,
Carlos Meneses,
Magno Sávio Ferreira Valente,
Cibele Chalita Martins,
Santiago Ferreyra Ramos,
Izamara Oliveira,
Therezinha de Jesus Pinto Fraxe,
Lucifrancy Costa,
Maria Teresa Gomes Lopes
Affiliations
Silfran Rogério Marialva Alves
Faculdade de Ciências Agrárias, Universidade Federal do Amazonas, Avenida Rodrigo Otávio Ramos, 3.000, Bairro Coroado, Manaus 69077-000, AM, Brazil
Ricardo Lopes
Campo Experimental da Embrapa Amazônia Ocidental, Embrapa Amazônia Ocidental, Km 29, AM 010, CP. 319, Manaus 69010-970, AM, Brazil
Carlos Meneses
Programa de Pós-Graduação em Ciências Agrárias, Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Estadual da Paraíba, Bairro Universitário, Campina Grande 58429-500, PB, Brazil
Magno Sávio Ferreira Valente
Campo Experimental do Instituto Federal do Amazonas, Instituto Federal do Amazonas, Av. Onça Pintada s/n, Presidente Figueiredo 69735-000, AM, Brazil
Cibele Chalita Martins
Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Rod. Prof. Paulo Donato Castellane, s/n, Jaboticabal 14884-900, SP, Brazil
Santiago Ferreyra Ramos
Instituto de Ciências Exatas e Tecnologia, Universidade Federal do Amazonas, Rua Nossa Senhora do Rosário, 3863, Bairro Tiradente, Itacoatiara 69100-000, AM, Brazil
Izamara Oliveira
Programa de Pós-Graduação em Ciências Agrárias, Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Estadual da Paraíba, Bairro Universitário, Campina Grande 58429-500, PB, Brazil
Therezinha de Jesus Pinto Fraxe
Faculdade de Ciências Agrárias, Universidade Federal do Amazonas, Avenida Rodrigo Otávio Ramos, 3.000, Bairro Coroado, Manaus 69077-000, AM, Brazil
Lucifrancy Costa
Faculdade de Ciências Agrárias, Universidade Federal do Amazonas, Avenida Rodrigo Otávio Ramos, 3.000, Bairro Coroado, Manaus 69077-000, AM, Brazil
Maria Teresa Gomes Lopes
Faculdade de Ciências Agrárias, Universidade Federal do Amazonas, Avenida Rodrigo Otávio Ramos, 3.000, Bairro Coroado, Manaus 69077-000, AM, Brazil
The Amazon is a center of diversity for Capsicum chinense Jacq., with wide genetic and morphological variability, but little exploration has been performed there to facilitate their improvement. This study aimed to characterize and evaluate C. chinense genotypes for the development of cultivars by determining the optimal size of the experimental plot and the minimum sample size to ensure a precise estimation of yield. A total of 23 genotypes were evaluated, and in multivariate analyses, the plants were characterized by 21 morphological descriptors and eight quantitative traits related to biometry and yield. The recommended sample size for fruit evaluation was defined based on simulations with subsample resampling and evaluation of the semi-amplitudes of the confidence interval of the mean estimate. The optimal plot size was estimated by the modified maximum curvature method. The similarity coefficients among the genotypes ranged from 0.54 to 0.93, indicating that the established clusters contained important information for future crosses. According to the sample size methodologies, 25 to 40 fruits should be sampled for valid evaluations of biometric traits. Experiments with five to eight plants per plot are recommended to test progenies of the species, ensuring good experimental precision combined with high selection accuracy for yield traits.
