Estado da arte do sequenciamento genômico na pecuária

There has been a lot of advance in genomics since 1975 when the possibility to determine the nucleotide sequence of a genome was described. In the 90’s the human genome sequencing was started and it was greatly favored by advances in computer technologies. In the last ten years the development of next generation sequencing technologies allowed the sequencing of millions of bases at low cost and in a shorter time compared to the previous technologies. After the conclusion of the human genome project, several initiatives to sequence the genome of domestic animal species were taken, resulting in a large amount of data that is redirecting the goals of genetic studies in domestic animals. The aim of this review was to describe the present situation of the sequencing initiatives on the main domestic animal species of economical interest as well as to list the most important tools available to access the genomic information.

Desempenho de discos de corte de semeadora-adubadora em diferentes quantidades de cobertura vegetal

The quality and efficiency in straw cutting are determinants in the sowing process, according to the occurrence of "tamp" and stops, the magnitude of the straw removal or even the known effects of the seed "envelopment" where the cutting mechanism can not cut the remaining straw. Thus, the objective of this study was to evaluate the performance of different mechanisms for straw cutting of a seeder individualized in different amounts of crop coverage artificially added in a clay soil. The experiment was conducted at Unesp – Sao Paulo State University in the Experimental Farm Lageado, belonging to the College of Agricultural Sciences - Unesp, Botucatu. The experimental design was split plot with four replications, with main plots consisting of five quantities of black oat straw, in area with no-tillage system and subplots of three opening furrows mechanisms, which are: plane disk (PD), corrugated disk (CD) and wavy disk (WD). The wavy disk provided greater rolling resistance, reducing the speed of the set (tractor and equipment). The plane cutting disk showed the highest values of mobilized soil area, deeper penetration into the soil, requiring lower values of vertical force and higher values of lateral force. Regarding the type of waste and doses used, they offered no resistance to cutting and there was no change in the horizontal force on straw.

Influência da Motilidade Gastrintestinal no processo de desintegração de comprimidos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)