Resumen

NEIMAUR, K et al. Phenotypic associations between mean fiber diameter and its variability with other fleece characteristics in Corriedale. Veterinaria (Montev.) [online]. 2015, vol.51, n.200, pp.4-4. ISSN 0376-4362.

Summary The objective of the essay was to determine wool fiber diameter, its variability and association with other fleece characteristics of subjective and objective evaluation in two experimental Corriedale flocks. A total of 871 hoggets were used, 477 females and 394 males. Prior to shearing, fleeces characteristics were subjectively evaluated (crimp definition, handle, color, staple thickness, staple formation and dust penetration). At shearing, greasy fleece weight was recorded and a wool sample from midside was extracted. Mean fire diameter and its variability (coefficient of variation and comfort factor), wool yield, clean fleece weight and staple length were determined. An analysis of variance was performed to study fixed effects of experimental station, year and sex on the evaluated characteristics; correlations between traits were estimated. Mean fiber diameter and its variability were affected by year, sex and experiment station. Mean fiber diameter was positively and significantly correlated with handle and staple thickness (0.31 and 0.29, respectively). The coefficient of variation of fiber diameter presented a moderate correlation with staple thickness and a positive and significant association with the rest of the characteristics subjectively appreciated except with dust penetration. The phenotypic associations found suggest a tool that could be possibly used to select animals with better characteristics of fiber diameter and wool quality. It would be important conducting genetic studies of fiber diameter and its associations with wool characteristics of subjective and objective evaluation in this breed.

Palabras clave : sheep; wool; mean fiber diameter; subjective wool traits.

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