Colombia is going through a dynamic research and technology transfer effort in order to improve its livestock enterprise.Animal production systems of twenty-two ecoregions in the lowland tropics are being characterized for ex-ante analysis to define technological alternatives.The Valley of Cesar in northern Colombia is a micro-region where agriculture has been its traditional production system, but now, 80% of the land ...

Rice blast has challenged plant breeders when they were searching for durable resistance in Colombia. Rapid resistance breakdowns were commonly observed in newly bred cultivars and they are attributed to frequent appearance of new pathotypes. Recent population studies of the rice blast pathosystem have shown that Pyricularia grisea in a given region, typically expresses a phylogenetic organization of distinct lineages ...

The capacity to degrade the cellular wall of Bouteloua repens of 12 isolates of Ruminococcus flavefaciens and 17 isolates of Fibrobacter succinogenes was determined. A procedure was developed to standardize both, the inoculum and the substrate concentration for in vitro incubations of pure culture isolates.The ruminal bacteria were isolated from either Bos indicus cattle from the Alto Magdalena region of Colombia, ...

Curly dock (Rumex crispus, ‘lengua de vaca’) and smartweed (Polygonum segetum, ‘gualola’), are two common weed species that grow in subtropical areas of the world, where cause great losses in crops and grasslands due to their aggressiveness. In Colombia they are found on lands over 2000 m.o.s.l., and as they propagate by both, sexual and vegetative ways, it is very difficult to manage them. Several experiments were ...

The induced humoral immune response against structural proteins of Indiana and New Jersey serotypes of the vesicular stomatitis virus was compared using serum obtained from vaccinated bovine, natural and experimentally infected ones. It was used Western blot technique to observe the recognition of protein G by serum of vaccinated animals, and the response to proteins G and N by serum of infected animals. Serum of ...

Expansion of human activities has major impact on the environment, generating changes that must be countered, such as climate change and dispersion of pollutants from industry and agriculture, through strategies that enable the conservation of soil and water reserves. The implementation of strategies with systems approach, covering mathematical simulation models, enables better decision making and a better understanding ...

Identification of papaya sex can only be done four months after transplanting. The possibility of earlier sex identification either with isoenzymatic patterns or physical seed traits were evaluated in two commercial seeds: the hybrid Tainung 1 and Improved Sunrise Solo 72/12 four experiments were carried out in the Lavras municipality, Minas Gerais (Brazil). The first two experiments evaluated the relationship of seed ...

Maize is an important crop in the well drained savannas in the Colombian eastern planes (known as ‘Llanos Orientales’) because of its economical potential in the balanced feed industry for livestock. However, insects like the brown stinkbug, Euschistus rufimanus (Hemiptera : Pentatomidae), is among the entomological problems that can seriously affect this crop. It causes malformation and decrease of leaf area index on ...

We describe the development of expressed sequence tags - simple sequence repeats (ESTSSRs) or genetic microsatellites of camu-camu, a small round native fruit of the Amazon rain forest, which that has the highest known amount of natural vitamin C of any plant. Two thousand sequences from a camu-camu ESTs library were analyzed and 219 ESTSSRs were selected for the development of SSRs markers, of which 74.2% were ...