Métodos estatísticos para estudo adaptabilidade e estabilidade fenotípica e repetibilidade em genótipos de goiabeiras

• Autor(a) principal: Silva, Clemilton Alves da
• Data de Publicação: 2017
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/7859
• topic: Psidium guajava L.; Interaction genotypes - Environments; Biometrics; Seleção; Interação genótipos - Ambientes; Melhoramento Vegetal; Goiaba; Seleção de plantas - Melhoramento genético; Interação genótipo - Ambiente; Biometria; 631.523

The guava is a species that stands out in Brazilian fruit-growing for its economic, social and food importance. Agronomic research concerning the genetic improvement of the species allows the knowledge about an adaptation of the culture to different environments. The objective of this work was to evaluate an interaction genotype environment and to estimate repeatability coefficients using production variables in 22 guava genotypes in two experiments not located in the state of Espírito Santo: one in the south of the municipality of Mimoso do Sul and the other in the north in the municipality From Linhares. The experimental design was a randomized block design, with four replications, each replicate with a plot composed of two plants. Among the most varied: fruit production by plants; Mass, fruit length and diameter, endocarp and mesocarp thickness, pulp mass and yield, determined fruit diameter ratio. An evaluation of the parameters of adaptability and stability of the genera testimony obtained by different methods: Eberhart & Russell, Lin & Binns, Annicchiarico, Modified centroid method, REML / BLUP and AMMI analysis. As estimates of the repeatability coefficient (r), were obtained by four different methodologies: analysis of variance; Maximum restricted likelihood, applying the basic model of repeatability; Major components based on correlation matrix; And structural analysis based on the matrix of correlations between as repeated measures. The methods analyzed were concordant for the parameters of adaptability and stability. The genotypes Cortibel LM and Cortibel RM are the most recommended for cultivation because they present satisfactory performance as environmental variations. The genotypes Cortibel LG, Cortibel LM, Cortibel BRM, Cortibel V Cortibel III, Cortibel RG presented general adaptability. The genotypes Cortibel SLG, Cortibel BLG, Paluma, 21st Century, Sassaoka presented better performance in favorable environments. The genotypes Cortibel V, Cortibel VII, Cortibel XII had satisfactory performances, deserve special attention in works of genetic improvement. There was agreement on the viii magnitudes of the repeatability coefficients for nine variables analyzed, obtained by different methods. The number of eight harvests used in the work was evaluated to evaluate the true value of the genotypes based on the variables fruit mass, fruit length, pulp mass, pulp yield, fruit size / diameter and fruit production per plant. There was a difference in the magnitude of the repeatability values of the analyzed variables. The number of medications needed to predict the individual's actual value obtained by the main component method were lower than all other methods analyzed.