McManus Concepta, Louvandini Helder, Gugel Rosilene, Sasaki Luiz Cláudio Bastos, Bianchini Eliandra, Bernal Francisco Ernesto Moreno, Paiva Samuel Rezende, Paim Tiago Prado
Department of Animal Production, Av. Bento Gonçalves, 7712 - Caixa Postal 15100 - CEP 91540-000, Porto Alegre, RS, Brazil.
Trop Anim Health Prod. 2011 Jan;43(1):121-6. doi: 10.1007/s11250-010-9663-6. Epub 2010 Aug 2.
The objective of this study was to evaluate and compare physical parameters in groups of sheep with different phenotypic characteristics in the Centre-west region of Brazil. Five groups of sheep, with nine animals per group, were selected, three groups of Santa Inês animals with different coat colours (white, brown and black), one group with crossbred animals (Santa Inês × Bergamasca) and one group with animals of the Bergamasca breed. The following traits were evaluated: coat thickness, number and length of hair, pigmentation level in the coat and the skin as well as the percentage area of sweats glands in the skin tissue, carried out by histological analysis. The number of hairs and the area of sweats glands were not significantly different between the evaluated groups. The Bergamasca breed showed low pigmentation of the skin and long hairs. The levels of pigmentation of the hair and of the skin were highly correlated. Between the Santa Inês groups, the group with white hair showed the better parameters for heat adaptation, while the brown hair group showed the lower heat adaptation when compared with another hair breed groups.
本研究的目的是评估和比较巴西中西部地区具有不同表型特征的绵羊群体的身体参数。选取了五组绵羊，每组九只，其中三组为不同毛色（白色、棕色和黑色）的圣伊内斯羊，一组为杂交羊（圣伊内斯羊×贝加马斯卡羊），一组为贝加马斯卡品种的羊。通过组织学分析评估了以下特征：被毛厚度、毛发数量和长度、被毛和皮肤的色素沉着水平以及皮肤组织中汗腺的面积百分比。评估组之间的毛发数量和汗腺面积没有显著差异。贝加马斯卡品种的皮肤色素沉着低且毛发长。毛发和皮肤的色素沉着水平高度相关。在圣伊内斯羊组中，白毛组表现出更好的热适应参数，而棕毛组与其他毛发品种组相比热适应能力较低。
