No abstract

Methods for genetic improvement of semi-perennial species, such as passion fruit, often involve large areas, unbalanced data, and lack of observations. Some strategies can be applied to solve these problems. In this work, different models and approaches were tested to improve the precision of estimates of genetic evaluation models for several characteristics of the passion fruit. A randomized block design (RBD) model was compared to a posteriori correction, adding two factors to the model (post-hoc blocking Row-Col). These models were also combined with the frequentist and Bayesian approaches to identify which combination yields the most accurate results. These approaches are part of a strategic plan in a perennial plant breeding program to select promising genitors of passion to compose the next selection cycle.For Bayesian, we tested two priors, defining different values for the distribution parameters of effect variances of the model. We also performed a cross-validation test to choose a priori values and compare the frequentist and Bayesian approaches using the root mean square error (RMSE) and the correlation between the predicted and observed values, called Predictive capacity of the model (PC). The model with the post-hoc blocking Row-Col design captured the spatial variability for productivity and number of fruits, directly affecting the experimental precision. Both approaches applied to the models showed a similar performance, with predictive capacity and selective efficiency leading to the selection of the same individuals.

Objetivou-se com este trabalho avaliar as características morfo-agronômicas do cafeeiro conilon submetido a diferentes manejos de espécies de adubos verdes. Foram avaliados cafeeiros contendo as espécies de adubo verde: feijão guandu, feijão de porco, mucuna preta e margaridão mexicano, em ambas as entrelinhas adjacentes (100%) e apenas na entrelinha localizada na entrelinha superior (50%), além de um tratamento testemunha (adubação convencional). A unidade experimental constituiu-se de uma planta de cafeeiro, variedade clonal “Incaper 8142” Conilon Vitória variedade 12 V (precoce), com espaçamento de 2,30 x 2,60 m, com cinco repetições. Utilizou-se bordadura de uma planta de cafeeiro entre as unidades experimentais. As varáveis avaliadas foram: comprimento do maior ramo ortotrópico (ALT); diâmetro dos ramos ortotrópicos (DRO); número de ramos plagiotrópicos lançados (NRP); número de nós produtivos dos ramos plagiotrópicos (NP); litros de café colhido in natura (LTS); quilogramas de café cereja produzidos por planta (kg). O manejo 50% de feijão guandu foi superior ao convencional para a maioria das características avaliadas, portanto pode ser recomendado, para o primeiro ano de transição.

The aim of this study was to evaluate the fresh mass of scarlet eggplant (kg/pl) and the number of leaves of chicory (nºf/pl) in relation to the spacing used by the farmers of the region for both crops. The experiment evaluated these crops under intercropping cultivation system, varying the number of chicory rows between scarlet eggplant rows as well as harvests (cycle of each crop), for intercropping and monocropping systems. The treatments were T1= scarlet eggplant 0.7x1.1 m (monocropping); T2= intercropped scarlet eggplant, 0.7x1.5 m, with four rows of chicory, 0.2x0.2 m between rows; T3= intercropped scarlet eggplant, 0.7x1.1 m, with three rows and chicory, 0.2x0.2 m; T4= intercropped scarlet eggplant, 0.7x1.3 m, with four rows of chicory, 0.2x0.2 m; T5= intercropped scarlet eggplant, 0.7x1.3 m, with three rows of chicory, 0.2x0.2 m; T6= chicory 0.2x0.1x0.4 m in two double rows, 0.2 m between rows, 0.1 m between plants and 0.4 m between double rows in 1.5 m linear area (monocropping) and T7= chicory 0.2x0.3 m with three simple rows in an 1.5-m area (monocropping). The experimental design was of strip blocks, in a 5x16 factorial scheme, consisting of five spacings of scarlet eggplant (monocropping), 1.5x0.7 m, 1.3x0.7 m and 1.1x0.7 m, alternating the number of chicory rows between rows and 16 harvests in time, once a week. For chicory, the design was also in a 6x12 factorial scheme, with six spacings. The spacing 0.2x0.2 m was intercropped with scarlet eggplant, alternating the number of rows and two monocroppings 0.2x0.1x0.4 m in double rows and 0.2x0.3 m with 12 harvests in time, being performed one harvest per week along with the scarlet eggplant. Intercropped scarlet eggplant in spacing 0.7x1.5 m showed higher averages in some harvests followed by spacing 0.7x1.3 m with four chicory rows between rows. Spacings 0.2x0.1x0.4 m and 0.2x0.3 m were the ones which provided the best averages for chicory crop, except for the 5th harvest, in which spacing 0.2x0.2 m consisting of four chicory rows provided the highest average (5.7 leaves/plant). Regardless of monocropping and intercropping arrangement used for chicory the Area Equivalence Index (IEA) was over 1.6.