Resumo -A busca por cultivares produtivas, adaptadas ao local de cultivo e com características tecnológicas desejáveis é uma constante. O objetivo deste trabalho foi avaliar o comportamento de genótipos de feijão, do grupo comercial Carioca, quanto a características agronômicas e tecnológicas. Vinte e nove genótipos foram cultivados na época das águas, nos anos de 2001 e 2002, e distribuídos em blocos casualizados, com quatro repetições. Sobressaíram-se os genótipos IAC-Carioca, FT-Bonito, Rudá, Porto Real, CNFC 8008, CNFC 8011, CNFC 8012, CNFC 8013 e CNFC 8156 com produtividade de grãos acima da média obtida. Destacaram-se com produtividade média de grãos acima de 3.000 kg ha -1 e tempo de cozimento médio em torno de 20 minutos, os genótipos IAC-Carioca, CNFC 8012 e CNFC 8156.Termos para indexação: Phaseolus vulgaris, produtividade, componentes da produção, proteína bruta, hidratação dos grãos. Agronomic and technologic characteristics of common bean genotypes from Carioca commercial groupAbstract -Cultivars with high yield, adaptability and desirable technological characteristics are a must. The objective of this work was to evaluate agronomic and technologic characters of common bean genotypes from carioca commercial group.

Termos para indexação: melhoramento de plantas, parcela, ganho genético, parâmetros genéticos, fenótipos, seleção. SAMPLE SIZE FOR HALF-SIB FAMILY EVALUATION IN MAIZEABSTRACT -This work had the aim to verify the effect of the number of plants per plot in the evaluation of half-sib families. For that, 25 half-sib families of CMS-39 were evaluated with the experimental design being a simple lattice, 5 x 5, with two replications. Each plot was constituted by three lines with 10 m of length. Each plot was subdivided in sub-plots with five plants, being discarded extremities. Associating the contiguous sub-plots it was possible to simulate 270 variance analyses, with the number of plants per plot varying from 5 to 135. Genetic and phenotypic parameters were estimated with their respective errors. Expected selection response yield was also simulated for each sample size. In this simulation, it was verified that the number of plants per plot affected experimental precision. As larger was the number of plants, more accurate were the experiments; plots with the same number of plants, even so distributed in two or three lines, provide greater experimental precision. The selection expected response decreases with the increase in the number of plants per plot.

-The objective of this study was to test the hypothesis that biochar, applied with cattle manure, promotes better development of seedlings of Magonia pubescens St. Hil. The experiment was conducted at the State University of Mato Grosso, Nova Xavantina, Brazil, in 2011. We used a completely randomized design, with twelve treatments and three replications. The substrates formed by the higher levels of cattle manure plus biochar (30%) provided better results of height, diameter and aerial biomass. However, the Dickson Quality Index has not confirmed the quality of seedlings in these treatments. We also observed that the doses of biochar (20 and 30%) when added separately to the Latosol, are not efficient for the growth improvement of the seedlings. Based on the present results, we validate the hypothesis that substrates formed with a mixture of cattle manure and biochar are effective to improve the production of seedlings of M. pubescens.Keywords: Tingui; Cerrado; Cattle manure. INTERAÇÃO ENTRE BIOCHAR E COMPOSTO ORGÂNICO NO DESENVOLVIMENTO DE MUDAS DE Magonia pubescens A. St.-Hil. RESUMO -Este trabalho teve como objetivo testar a hipótese de que o biochar (carvão vegetal), aplicado em conjunto com compostos orgânicos como esterco bovino, promove melhor desenvolvimento de mudas de

The aims of this work were to estimate the coefficient of relatedness within families and the genetic parameters for growth related traits in a progeny test from an open-pollinated variety of Pinus caribaea Morelet hondurensis Barret & Golfari, established in Mato Grosso do Sul State, Brazil. The experimental design was the triple 10 x 10 lattice, with 96 families, three replicates, and ten plants per plot. Fourteen years after planting, the trial was measured for the following traits: total height, diameter at breast height (DBH), and true volume. The estimation of coefficients of relatedness within family from microsatellite loci indicated that families are true half-sibs ( ). Thus, the additive genetic variance ( ) can be estimated assuming that the genetic variance among progenies ( ) accounts for ¼ of additive genetic variance ( ). The estimative of heritability coefficients at individual level ( ) was relatively high (0.28 for DBH and 0.44 for height). The heritability coefficient considering the average families ( ) was also high, ranging among the traits from 0.50 to 0.58. These results suggest that the population can be improved by both massal and among families selection. Additionally, the estimated genetic gains with sequential selection among and within families were high (ranging from 8.92% for height to 37.56% for volume), demonstrating that this method of selection can generate high genetic improvement.

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