Characteristics of the wool produced by ewes raised for meat production

The objective of this study was to evaluate the characteristics of wool produced by ewes of different genetic groups, ages, and reproductive statuses. A total of 115 ewes, of the following genetic groups, were used: 10 Corriedale, 37 Hampshire Down, 26 1/2 Hampshire Down + 1/2 Corriedale, 24 1/2 Ile de France + 1/2 Corriedale, and 18 1/2 Suffolk + 1/2 Corriedale. Age was determined by the number of permanent incisors, ranging from four teeth to eight teeth. Ewes were further classified by their reproductive status into: lambed, having reared one lamb; and not-lambed. Hampshire and half-blood Suffolk ewes were heavier (53.2 and 52.7 kg, respectively), while Corriedale animals were lighter (40.1 kg). Older ewes and not-lambed ewes were heavier as well. Fleece weight was higher for the Corriedale and its crossbred ewes (average of 2.9 kg). Genetic group did not affect yield after scouring (61.6%). Ewe age, reproductive status, and year of evaluation did not affect greasy fleece weight or yield. Fiber diameter and number of crimps were not affected by any tested variables, with mean values of 29.8 μm and 5.8 crimps per centimeter, respectively. Staple length was influenced only by genetic group, in which the Hampshire ewes showed the shortest staple (6.2 cm). In general, the character was classified as good to regular, and the worst was found in the Hampshire. That genetic group grew rough wool, while the others were rated as slightly soft to rough. All genetic groups presented wools with some medullation. The majority of the samples were classified from "Cruza 1" to "Cruza 3" in all five groups and, for quality, the majority of the samples were rated as Good. Wool produced by meat breeds presents variations of quantity and quality that should be considered by producers and industry.

[1]  P. D. Waquil,et al.  The evolution of sheep production in Rio Grande do Sul and Uruguay: a comparative analysis of structural change , 2013 .

[2]  I. Y. Mizubuti,et al.  Performance from birth to weaning of Santa Inês lambs born to ewes fed different levels of energy , 2012 .

[3]  F. Júnior,et al.  DESEMPENHO DE CORDEIROS DO NASCIMENTO AO DESMAME FILHOS DE OVELHAS ALIMENTADAS COM DIFERENTES NÍVEIS DE ENERGIA , 2012 .

[4]  I. Y. Mizubuti,et al.  Influence of pre and postnatal energy restriction on the productive performance of ewes and lambs , 2012 .

[5]  C. Tayana.  Genética e melhoramento animal de caprinos e ovinos , 2011 .

[6]  A. Ceyhan,et al.  The relationship between body weight and body condition score some indigenous sheep breeds in Turkey. , 2011 .

[7]  I. Y. Mizubuti,et al.  Productive performance of ewes mated in summer or autumn in Northern Paraná , 2008 .

[8]  I. Y. Mizubuti,et al.  Desempenho produtivo de ovelhas submetidas a acasalamentos no verão ou no outono no Norte do Paraná 1 Productive performance of ewes mated in summer or autumn in , 2008 .

[9]  Antonio Pereira de Souza,et al.  Epidemiologia das helmintoses gastrintestinais de ovinos no Planalto Catarinense , 2004 .

[10]  E. Cunha,et al.  Utilização de carneiros de raças de corte para obtenção de cordeiros precoces para abate em plantéis produtores de lã , 2000 .

[11]  I. Y. Mizubuti,et al.  Aspectos quantitativos e qualitativos da lã de ovelhas hampshire down , 1997 .

[12]  D. Mccall,et al.  Relative wool production of wethers and ewes of different rearing status , 1989 .