Prós e contra da resistência genética dos ovinos aos helmintos gastrintestinais.

É possível selecionar ovinos mais resistentes às parasitoses dentro do próprio rebanho; Fenótipos; A seleção por OPG permite respostas favoráveis à obtenção de ovinos mais resistentes aos parasitos gastrintestinais; Tipos de desafio; Correlação da seleção por OPG com características produtivas; Programas de seleção; Desafio de campo.bitstream/item/55753/1/DT-79.pdfDisponível no formato online

Otimização dos microssatélites BM4311, BMC1207, BMS1004, BMS1617, BMS6026 e CSKB074 em multiplexes.

Processo de otimização; Descrição sucinta da técnica; Caracterização; Impactos esperados.bitstream/item/55769/1/DT90.pd

Otimização dos microssatélites DIK4755, INRA192 e DIK4913 em multiplexes.

Descrição sucinta da técnica; Caracterização; Impactos esperados.bitstream/item/31744/1/CT-39online.pd

Genetic parameters of wool colour and skin traits in Corriedale sheep.

Clean wool colour (CWC) is an important wool price determinant and has been related to suint characteristics, i.e. sudoriparous and sebaceous gland secretions, such as suint percentage and suint K content. In this work heritability, phenotypic and genetic correlations among wool colour and skin traits were examined. The genetic estimates were assessed by Restricted Maximum Likelihood (REML) procedures using average information algorithm (AIREML) in a Corriedale flock. The traits analysed were wool colour traits (CWC), yellow predictive colour (YPC), and Visual Score; suint traits such as suint percentage and potassium and sodium concentrations in suint, and physiological traits such as potassium and sodium concentrations in the skin, including plasma and red blood cells. The objectives of this study were to assess phenotypic and genetic correlations between wool colour and skin traits, and to find the suitability of these traits as indirect selection criteria for clean wool colour. Suint traits were highly genetically correlated to YPC. Suint K, but not suint percentage, was found to have a high genetic correlation with CWC. Skin K, Visual Score, YPC and suint K were amongst the best indirect selection criteria for clean wool colour. However, selection using these traits was expected to reduceCWCfrom 52% to 49% of that estimated under direct selection

O efeito tosquia na produção ovina: uma revisão.

bitstream/item/110443/1/O-EFEITO-TOSQUIA-NA-PRODUCAO.pd

Melhoramento de espécies aquícolas com foco na resistência a doenças.

Introdução. Aspectos a serem considerados no melhoramento genético com foco em doenças. Estimativas de herdabilidade e de correlações genéticas entre resistência a doenças e outras características. Cuidados no desenho experimental dos desafios para a fenotipagem de animais. Considerações finais. Referências.bitstream/item/136151/1/CNPASA2015doc17.pd

Indirect selection criteria against clean wool colour in Corriedale sheep and their effects on wool production traits.

The potential of greasy wool colour subjective assessment Visual Colour Score (VCS) and the yellow predictive test (YPC) as indirect selection criteria for reduction of clean wool colour (CWC) in Corriedale sheep was examined. The heritability of these wool colour traits and the wool production traits, greasy (GFW) and clean fleece weights (CFW), and mean fibre diameter (MFD) and the phenotypic and genetic correlations among these traits were estimated from a Corriedale flock using AIREML procedures. A high genetic correlation between YPC and CWC was observed, indicating that YPC could be a suitable indirect selection criterium for CWC. However, direct selection against CWC was predicted to produce faster genetic improvements in CWC than that expected under indirect selection via YPC. Single trait selection based on VCS or YPC were expected to reduce the response in CWC to 51% and 49% of that estimated for direct selection. The positive genetic correlations of CWC, YPC and VCS with CFW and MFD would cause a reduction in both MFD and CFW to result from selection that reduces wool colour. The results showed that the most effective way to genetically improve CWC was through indirect selection to reduce MFD, CFW or GFW, followed by direct selection, but the premiums for CWC in the Corriedale breed may not be sufficient to justify the expected losses in CFW

Curso de atualização sobre Tristeza Parasitaria Bovina (TPB).

A tristeza Parasitária Bovina (TPB) é um complexo de doenças que no nosso meio é causado principalmente por Babesiose e Anaplasmose, além de envolver a presença do carrapato Boophilus microplus. Este conjunto de enfermidade é uma das principais senão a maior preocupação dos produtores de bovinos da Região Sul do Brasil, pois traz importantes prejuízos econômicos por mortalidade e morbidade. Portanto é oportuno trazer o assunto à discussão para a atualização do conhecimento de técnicos e produtores rurais.bitstream/item/110567/1/CURSO-DE-ATUALIZACAO-SOBRE.pd

A putative resistant DNA marker for wool yellowing susceptibility in sheep.

An Australian Merino flock was screened for low (resistant) and high (susceptible) yellow predictive colour (YPC) breeding values in order to compare extreme individuals using the differential display of mRNA technique. One differentially expressed cDNA band was visualised only in the resistant group. This band showed no identity with the DNA sequences of public databases; however, they showed short homologies with three database sequences related to transmembrane signalling functions. The use of these candidate genes as DNA markers needs to be confirmed against sheep with a wide range of susceptibility to wool yellowing to verify the results

Monitoramento por OPG e cultura de fezes de ovinos de uma propriedade rural na região de Bagé (2007-2009).

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