ABSTRACT. Breeders normally select simultaneously for several traits in various environments. We investigated the effects of the progeny x environment interaction on success in selection for several traits. The population used was obtained from a cross between the CVIII-85-11 line, which has a semi-erect to prostrate plant architecture and a cream with brown streaks bean type, and the BRS-Supremo cultivar, which has an erect plant architecture and black grains. In experiments conducted in the field, 47 progenies F 4:6 and F 4:7 were evaluated for two seasons for grain yield, plant architecture and grain type score. The variables were standardized and we obtained the sum of Z. The components of genetic variance in the average of the two environments were nil due to the progeny x environment interaction, which would hinder successful simultaneous selection of characters.

-The aim of this study was to estimate the relative contribution of predictable and unpredictable environmental variations to the lines x environments interaction and verify if it is possible to reduce the number of evaluation environments of the Value for Cultivation and Use Trials (VCU) conducted in Minas Gerais, Brazil. We used grain yield data from 166 VCU trials of common bean conducted in the state from 2002 to 2012. Individual and joint analyses of variance of the environments were carried out for each twoyear period and the contribution of each source of variation to total variation was estimated. Subsequently, ecovalence was used, and joint analyses of variance were made considering different numbers of environments by means of resampling. The source of variation that most contributes to the interaction is location. Reduction in the number of environments in the VCU trials is not a good strategy for recommendation of cultivars in Minas Gerais.

-Apparently, there are no custard apple cultivars defined for the northeastern region of Brazil. The establishment of breeding programs aimed at the selection of types from productive locations for later cloning is desirable. This work's objective was to evaluate the yield (during the first three crops) and quality (first crop) of fruits from 20 half-sibling custard apple tree progenies, selected from home orchards. An additional objective was to estimate genetic parameters for the traits evaluated. A micro sprinkling-irrigated experiment was conducted in Mossoró-RN, Brazil, as random blocks with five replications. In characteristics evaluated for periods longer than a year (diameter, height and mean weight of fruits, number of fruits ha -1 and fruit yield (kg ha -1 ), and a split-plot design was adopted, with progenies considered as plots and annual cropping seasons as subplots. The best progenies in terms of fruit yield (A3 and A4) are not necessarily the best for fruit dimensions and fruit mean weight (A2, FE4, JG1, JG2, SM1, SM7, and SM8). These progenies show great potential to be used in future studies on crosses or on vegetative propagation. In this regard, progeny JG2 should be highlighted as promising in terms of yield and fruit size. The progenies are not different with regard to percentages (in relation to mean fruit mass) of pericarp, endocarp, seeds, and receptacle, in the fruit, and fruit volume, number of seeds/fruit, and total soluble solids content in the fruit pulp, but progeny FE4 presents higher total titratable acidity in the fruit pulp. Narrow-sense heritability estimates were relatively high for all characteristics in which there was variability between progenies, with higher values for number of fruits ha -1 (80 %) and fruit yield (78 %). Relatively high coefficients of genotypic variation (around 20%) were observed for number of fruits ha -1 and fruit yield, with lower values for the other characteristics. There were positive genotypic and phenotypic correlations between fruit diameter (FD) and fruit height, FD and mean fruit weight, and number of fruits ha -1 and fruit yield. Index Terms: Annona squamosa L., bullock's heart, sweetsop, heritability, genotypic correlation ESTIMATIVAS DE PARÂMETROS GENÉTICOS DO RENDIMENTO E DA QUALIDADE DO FRUTO DE PROGÊNIES DA PINHEIRARESUMO -Aparentemente não existem cultivares de pinheira definidas para o Nordeste brasileiro. É desejável o estabelecimento de programas de melhoramento, visando à seleção de tipos de locais produtivos para posterior clonagem. O objetivo do presente trabalho foi avaliar o rendimento (nas três primeiras safras) e a qualidade (na primeira safra) dos frutos de 20 progênies de meias-irmãs de pinheiras, selecionadas em pomares caseiros. Um objetivo adicional foi a estimação de parâmetros genéticos para as características avaliadas. O experimento, irrigado por microaspersão, foi realizado em Mossoró-RN, em blocos ao acaso, com cinco repetições. Nas características avaliadas em três safras (diâmetro, altura e peso médio d...

-The objective of this work was to estimate the repeatability of adaptability and stability parameters of common bean between years, within each biennium from 2003 to 2012, in Minas Gerais state, Brazil. Grain yield data from trials of value for cultivation and use common bean were analyzed. Grain yield, ecovalence, regression coefficient, and coefficient of determination were estimated considering location and sowing season per year, within each biennium. Subsequently, a analysis of variance these estimates was carried out, and repeatability was estimated in the biennia. Repeatability estimate for grain yield in most of the biennia was relatively high, but for ecovalence and regression coefficient it was null or of small magnitude, which indicates that confidence on identification of common bean lines for recommendation is greater when using means of yield, instead of stability parameters.Index terms: Phaseolus vulgaris, biometry, genotype by environment interaction, plant breeding, quantitative genetic. Repetibilidade dos parâmetros de adaptabilidade e estabilidade do feijoeiro em ambientes imprevisíveisResumo -O objetivo deste trabalho foi estimar a repetibilidade dos parâmetros de adaptabilidade e estabilidade do feijoeiro entre anos, dentro de cada biênio de 2003 a 2012, em Minas Gerais, Brasil. Os dados de produtividade de grãos provenientes de ensaios de valor de cultivo e uso de feijoeiro-comum foram analisados. A produtividade de grãos, a ecovalência, o coeficiente de regressão e o coeficiente de determinação foram estimados quanto a local e época de semeadura por ano, dentro de cada biênio. Posteriormente, realizou-se análise de variância destas estimativas, e a repetibilidade foi estimada nos biênios. A estimativa de repetibilidade quanto à produtividade de grãos, na maioria dos biênios, foi relativamente alta, mas, quanto à ecovalência, ao coeficiente de determinação e ao coeficiente de regressão, foi nula ou de pequena magnitude, o que indica maior confiança na identificação de linhagens de feijão a serem recomendadas, quando se usam as medidas de produtividade, em vez dos parâmetros de estabilidade.Termos para indexação: Phaseolus vulgaris, biometria, interação genótipo por ambiente, melhoramento de plantas, genética quantitativa.

The occurrence of precipitation / rain in harvest bean causes damage to the product and reduces the yield. The main alternative to mitigate this problem is to obtain cultivars presenting low germination of beans in the pods under conditions of high moisture. The purpose of this study was to verify if there is genetic variability among the common bean inbred lines that are in the phase of recommendation for the South of Minas Gerais, Brazil in regard to tolerance to moisture after harvest, and identify traits that may be routinely used in selection of tolerant lines to these conditions. Ninety-five lines in the phase of recommendation by the Genetic Breeding Program from UFLA were used. After harvest, a sample of plants from each plot was removed for assessments of seed germination in the pods in a moist chamber and water absorption by pod and seed. Eight days after harvest, another sample was removed to assess seed appearance using a scoring scale. The data were submitted to analysis of variance and estimates of the Pearson phenotypic correlations were obtained among traits. Lines differ in relation to tolerance to moisture at the time of harvest, with those of higher tolerance having lighter colored seeds. The main difficulty in selection of common bean lines for tolerance to high moisture at harvest is the repeatability of the environmental conditions among crop seasons. The alternative is assessing the amount of water absorbed by pods.