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International Journal of Morphology

On-line version ISSN 0717-9502


FLORES QUINTANA, C; YANEZ, E; CARLINO, M  and  BANGHER, G. Skin Morphology and Wool Production on Merino Multipurpose from Absorbent Crosses. Int. J. Morphol. [online]. 2012, vol.30, n.4, pp.1434-1441. ISSN 0717-9502.

Textile market trends show that fine wools are more suitable to reach the preferences of textile industry. Production of fine wool in Argentina are insignificant, which is a limitation on the development of the country. The need to develop new alternatives of production leads us consider the Multipurpose Merinos as an option. Crossbreeding with these animals began at Corrientes state in order to achieve a reduction in the diameter of fiber and an impact on the weight of the fleece. These crossbreedings with Corriedale sheep were carried out with the objective of analyzing changes on wool production, quality and skin characteristics. Evaluation parameters were fiber diameter, density of follicles and Secondary/Primary relation. Follicle count primary and secondary were made from skin biopsies and were performed with the aid of a punch. Features regarding the production and quality of wool from sheep were considered in contemporary animals, evaluating fleece weight and clean dirty, length of strands, washing yields, coefficient variation of fiber and W / D3. The comparison made in this paper would attribute the decrease in fiber diameter to the crossing with MPM. The follicle density on Corriedale ewes, Corriedale ewe lambs in and the F1 (Corriedale x MPM) were significantly different. The S / P was 9,08 ± 2,32 ; 9.46 ± 1.57 and 11,93 ± 2,18 respectively. The fleece weight in the F1 ewe lambs (Corriedale x MPM) was lower and significantly different from its Corriedale contemporaries. The yield on wash fleece at Corriedale ewe lambs was higher than ewe lambs crossbred with MPM. The differences were significant in length of strands between Corriedale and Corriedale sheep x MPM. Expected results from the crossbreeding could not be substantiated under the conditions realized. Additional studies will be needed to support possible morphological and productive investment.

Keywords : Sheep; Skin histology; Follicular density; Relationship secondary/primary.

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