Fleece properties of crossbred sheep.
Abstract: Wool samples were collected from 60 ewes (Finn - Barki - 1/2 F.B - 1/4 F.B) present at the Experimental Station of the Faculty of Agriculture, AI- Azhar University. No significant increase (P<0.05) in both grease and clean fleece weights was recorded for either the two types of crosses compared to their local parent and grandparent means being (1.69 and 1.48 Kg) vs. (1.65, 1.45 Kg) for the ½ F.B and ¼ F.B vs. (1.45 & 1.29 Kg) for Barki. No significant increase in wool yield percentage was noticed for ½ F.B and ¼ F.B (87.83 and 87.84 %) compared to their local Barki parents (88.55 %). Fibre lengths and diameters of the crossbreeds were significantly lower (P<0.05) by (-5.66 and - 15.64%) and (-15.63 and - 7.82 %) in ½ and ¼ F.B compared to their local parent and grandparent means. The different values in four breeds studied showed no significant difference and no specific trend for bulk and resilience. True wool percentage in the crossbreeds was below the expected values. It was slightly less by -0.80 % in ½ F.B, while it was considerably decreased by -5.66 % in ¼ F.B compared to local parent and grandparent means. Significant decrease (P<0.05) in medullated fibres percentage was noticed in both half and quarter Finn blood, as it was decreased by - 52.55 and - 25 % in ½ F.B and ¼ F.B compared to their local parent and grandparent means. Kemp fibres percentage was increased significantly (P<0.05) by 18 and 53 % in both ½ F.B and ¼ F.B compared to the local parent and grandparent means.
However, significant increase (P<0.05) in colored fibres percentage was noticed in both half and quarter Finn blood with Barki estimated by 294.16 and 573.33 % compared to the local parent and grandparent means. The result obtained from the histological study of the skin showed that the two grades of crosses were larger than expected, in both density of follicle groups /1mm2 and the number of primary follicles /group, which increased 6.17 and 3.94 % and 2.46 and 3.28 % in ½ F.B and ¼ F.B compared to local parent. Number of secondary follicles / group and S/P follicle ratio were decreased by -18.35 and -21.47 in ½ F.B and -20.93 and -23.43 in ¼ F.B compared to their parent and grand parent means. It was concluded that crossing Finnish Landrace with Barki did not improve the quality of carpet wool produced by the offspring, although it increased significantly the fleece weight.
Publication year 2000
Pages 72
Availability location مكتبة معهد بحوث الانتاج الحيوانى- شارع نادى الصيد - الدقى - الجيزة
Availability number 718
Organization Name
Country Egypt
Department Sheep and Goat Research Department
Author(s) from ARC
Agris Categories Animal physiology - Reproduction
AGROVOC
TERMS		 Crossbreeding. Fibres. Sheep. Wool.
Publication Type Master Thesis
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