Estimativa de parâmetros genéticos em populações segregantes de feijoeiro oriundas de genitores de diferentes conjuntos gênicos.

Este trabalho teve por objetivo verificar se populações de feijoeiro oriundas do cruzamento de genitores de diferentes conjuntos gênicos (pools gênicos) contribuem para obtenção de populações com maior variabilidade genética para caracteres quantitativos. Foram utilizadas quatro linhagens adaptadas às condições de cultivo brasileiras, sendo duas de origem Mesoamericana (BRS Valente, BRSMG Majestoso) e duas de origem Andina (ESAL 686 e BRS Radiante). Foram avaliadas 55 progênies F2:3 de cada população em um látice simples 15x15. As características avaliadas foram dias para florescimento, massa de 100 grãos, nota de porte e produtividade de grãos. Os dados foram submetidos à análise de variância e foram obtidas as estimativas de herdabilidade no sentido amplo (ha²) para cada população. Para os caracteres: dias para florescimento, massa de 100 grãos e nota de porte, maior estimativa de herdabilidade foi observada no cruzamento entre genitores de diferentes conjuntos gênicos. Já para o caráter produtividade de grãos as estimativas de herdabilidade não diferiram entre si, contudo nas populações oriundas de genitores de conjuntos gênicos diferentes apresentaram média de produtividade menor que as demais

Características de carcaça e composição corporal de frangos caipiras submetidos à sistema alternativo de criação.

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Mejoramiento de población de arroz para aumentar el contenido de zinc en granos.

El objetivo de este estudio fue obtener progenies de arroz con alta concentración de zinc en los granos pulidos por selección recurrente.PCCMC

Trends in corrected lung cancer mortality rates in Brazil and regions

ABSTRACT OBJECTIVE: To describe the trend in cancer mortality rates in Brazil and regions before and after correction for underreporting of deaths and redistribution of ill-defined and nonspecific causes. METHODS: The study used data of deaths from lung cancer among the population aged from 30 to 69 years, notified to the Mortality Information System between 1996 and 2011, corrected for underreporting of deaths, non-registered sex and age , and causes with ill-defined or garbage codes according to sex, age, and region. Standardized rates were calculated by age for raw and corrected data. An analysis of time trend in lung cancer mortality was carried out using the regression model with autoregressive errors. RESULTS: Lung cancer in Brazil presented higher rates among men compared to women, and the South region showed the highest death risk in 1996 and 2011. Mortality showed a trend of reduction for males and increase for women. CONCLUSIONS: Lung cancer in Brazil presented different distribution patterns according to sex, with higher rates among men and a reduction in the mortality trend for men and increase for women

Comparação de métodos de melhoramento para produtividade de grãos em feijoeiro-comum.

O presente trabalho teve como objetivo comparar o desempenho de famílias obtidas por diferentes métodos de condução de populações segregantes para produtividade de grãos em feijoeiro-comum.CONAFE

Estabilidade de linhagens de feijoeiro comum no ensaio intermediário da Embrapa, ciclo 2007.

O objetivo deste trabalho foi avaliar a estabilidade e a adaptabilidade das linhagens do feijoeiro comum do grupo comercial carioca no Ensaio Intermediário da Embrapa, visando futura indicação de novas linhagens para diferentes regiões produtoras

BRS Sublime - Common bean cultivar with carioca grain, resistance to angular leaf spot and high nutritional quality.

BRS Sublime is a common bean cultivar with carioca grains, high nutritional grain quality, and high yield potential (4667 kg ha-1). It has a normal cycle, upright growth, low loss rates in the mechanical harvest, and is recommended for planting in 19 Brazilian states, in the three main common bean cultivation regions. It is the first cultivar developed in the world with angular leaf spot resistance.Cultivar release

Applying assisted reproductive technology and reproductive management to reduce CO2-equivalent emission in dairy and beef cattle: a review.

Methane emission from beef and dairy cattle combined contributes around 4.5-5.0% of total anthropogenic global methane. In addition to enteric methane (CH4) produced by the rumen, cattle production also contributes carbon dioxide (CO2) (feed), nitrous oxide (N2O) (feed production, manure) and other CH4 (manure) to the total greenhouse gas (GHG) budget of beef and dairy production systems. The relative contribution in standard dairy systems is typically enteric CH4 58%, feed 29% and manure 10%. Herds with low production efficiency can have an enteric CH4 contribution up to 90%. Digestibility of feed can impact CH4 emission intensity. Low fertility herds also have a greater enteric CH4 contribution. Animals with good feed conversion efficiency have a lower emission intensity of CH4/kg of meat or milk. Feed efficient heifers tend to be lean and have delayed puberty. Fertility is a major driver of profit in both beef and dairy cattle, and it is highly important to apply multi-trait selection when shifting herds towards improved efficiency and reduced CH4. Single nucleotide polymorphisms (SNPs) have been identified for feed efficiency in cattle and are used in genomic selection. SNPs can be utilized in artificial insemination and embryo transfer to increase the proportion of cattle that have the attributes of efficiency, fertility and reduced enteric CH4. Prepubertal heifers genomically selected for favourable traits can have oocytes recovered to produce IVF embryos. Reproductive technology is predicted to be increasingly adopted to reduce generation interval and accelerate the rate of genetic gain for efficiency, fertility and low CH4 in cattle. The relatively high contribution of cattle to anthropogenic global methane has focussed attention on strategies to reduce enteric CH4 without compromising efficiency and fertility. Assisted reproductive technology has an important role in achieving the goal of multiplying and distributing cattle that have good efficiency, fertility and low CH4