O trabalho teve como objetivo avaliar o comportamento fenológico de cagaiteiras (Eugenia dysenterica DC.), nativas e cultivadas do cerrado de Goiás. As cagaiteiras cultivadas encontram-se implantadas na área experimental da Escola de Agronomia e Engenharia de Alimentos, da Universidade Federal de Goiás (EA/UFG), em Goiânia-GO, e a população nativa localizada no município de Senador Canedo-GO. Os dados climatológicos foram obtidos da Estação Evaporimétrica da EA/UFG. Foram estudadas as fenofases de folhação, floração e frutificação da cagaiteira no período de janeiro de 2004 a novembro de 2005. As cagaiteiras, nas duas condições (cultivadas e nativas), apresentaram o mesmo comportamento em relação às variáveis estudadas. Observou-se que a folhação das cagaiteiras ocorrem durante todo o ano e em intensidade no período de renovação das folhas, nos meses de setembro a outubro. Já o florescimento foi sincrônico e abundante. A frutificação foi menor em plantas mais novas, enquanto o desenvolvimento e a maturação dos frutos ocorrem entre 30 a 40 dias da antese das flores, coincidindo com o período chuvoso. As plantas mais velhas apresentam maior produção de cagaita nas duas épocas avaliadas.

The objective of this research was to accompany and to register the phenological behavior of the cagaiteira (Eugenia dysenterica DC.), relating the frequency of the phenophases in four E. dysenterica populations to the climate conditions of the studied period. Three of those populations are located at the Escola de Agronomia e Engenharia de Alimentos, Universidade Federal de Goiás (EA/UFG), in Goiânia, Goiás State (Brazil). A fourth population comprises native E. dysenterica plants, located in the municipality of Senador Canedo, Goiás State. Climatological data were obtained from the first class station at EA/UFG. The studied cagaiteira populations presented the same behavior of the appraised phenophases. The cagaiteira leafing in the studied populations behaves in a continuous way, during the whole year and at greater intensity in the period of total leaf renewal, coinciding with the increase of the relative air humidity and temperature in the months of September and October. The cagaiteira flowering is synchronic o and abundant. The fruiting was smaller in younger plants. The development and maturation of the fruit was fast (30 to 40 days) and coinciding with the start of the rainy season. Older and more developed cagaiteiras (Senador Canedo) presented higher production, some reaching over 2,000 fruits per year.

O objetivo deste trabalho foi estimar a adaptabilidade e estabilidade de genótipos de trigo irrigado, nas condições do Cerrado do Brasil Central. O rendimento de grãos de cinco cultivares e nove linhagens de trigo irrigado foram aferidos no ensaio de valor de cultivo e uso. Os ensaios foram conduzidos nos anos de 2005 e 2006, em seis locais em Minas Gerais, três em Goiás e um no Distrito Federal. Os dados de rendimento de grãos foram submetidos à análise de variância individual e à análise de variância conjunta, para a estimativa dos parâmetros de adaptabilidade e estabilidade. Verificaram-se diferenças significativas, entre os genótipos, em 14 dos 16 ambientes avaliados. Nenhum dos genótipos avaliados apresentou o comportamento ideal preconizado pelo método de Cruz e colaboradores. Destacaram-se a cultivar BRS 264 e a linhagem CPAC 02167, pela superioridade em todas as condições do Cerrado do Brasil Central (adaptabilidade geral). Entre os demais genótipos avaliados, destacaram-se as cultivares BRS 207 e EMBRAPA 22, responsivas à melhoria das condições ambientais, e as cultivares BRS 254 e EMBRAPA 42, pela adaptabilidade específica a ambientes desfavoráveis ao cultivo de trigo irrigado.

The aim of this work was to estimate the adaptability and stability of irrigated wheat genotypes under conditions of Central Brazil savannah area. Grain yield of five cultivars and nine lines of irrigated wheat was measured in assays of cultivation value and use. The assays were conducted during the years 2005 and 2006, in six locations in Minas Gerais State, three in Goiás State and one in Federal District. The data of grain yield were submitted to individual and joint ANOVA, in order to estimate the adaptability and stability parameters. Significant differences were detected between genotypes in 14 of the 16 locations evaluated. None of the evaluated genotypes have presented the behavior predicted by the method of Cruz and collaborators. Cultivar BRS 264 and the CPAC 02167 lineage were superior in all the tested conditions in the Central Brazil savannah (general adaptability). Among the other evaluated genotypes, it can be highlighted the responsiveness of the cultivars BRS 207 and EMBRAPA 22 to the improvement of environmental conditions, and the specific fitness of BRS 254 and EMBRAPA 42 cultivars to environments unfavorable to irrigated wheat.

The Brazilian Cerrado (Savannah) is a biome with great biodiversity. Many of the species found in this biome have unlimited economic potential and are used by the local population for various purposes. With the opening of the agricultural frontiers in this region, much of the native flora has been replaced by extensive areas of monocultures. Thirteen populations of the Eugenia dysenterica DC species were sampled in the northeast of the state of Goiás, Brazil, to analyze their genetic structure. Morphological traits were measured for all the progeny obtained and some of them were analyzed by using RAPD markers. The natural populations of the species showed high levels of variability for the morphological traits. The phenotypic, genotypic and genetic variabilities as structured in these populations were highly significant among populations, although most of the variability was detected within populations. The phenotypic and genetic variabilities were structured spatially as shown by the positive and highly significant correlation coefficients between the phenotypic and genetic distance matrixes and the geographic distance matrix. The ideal conservation strategy for the species in the region requires sampling of a high number of individuals of each population and also a significant number of populations to ensure suitable effective population sizes.