The use of fine and coarse bucks and G4 does for breeding for cashgora production


D.J. Paterson, A.J. Litherland, S-A.N. Newman, D.K. Edmonds

MAF Technology, Flock House Agricultural Centre, Private Bag, Bulls, New Zealand

Proceedings of the New Zealand Society of Animal Production. 1991, 51: 429-436

Two hundred and six mixed age Angora x Feral (G4) does with a mean fibre diameter of 20.4 microns were randomly mated to three bucks with mean fibre diameter of 18.8 microns (Group 1) and three bucks with mean fibre diameter of 22.2 microns (Group 2) in June 1987. The progeny were shorn at 10 months (August 1988), 16 months (March 1989) and 22 months (August 1989) of age. The fleeces were measured for fleece weight, mean fibre diameter, yield by weight of down, and colour. Down weight was then calculated. The fibre was visually classed according to Mohair-Cashmere Warehouse fibre lines and an economic value put on the fibre.

Group 1 progeny were heavier and had finer fleeces and lower down weights than group 2 progeny at all three shearing date. Group fleeces were 0.6, 0.9 and 1.0 micron finer and 71, 86 and 109 grams lighter than Group 2 at the three shearing dates respectively. Fibre diameter increased during the experiment to a greater extent in Group 2 (3.8±0.1 microns) than group 1 (3.4±0.1 microns). Group 1 had a lower yield percentage of down (12%, 10% and 6% lower) than Group 2 at all three shearings.

At the first shearing fleeces from Group 1 were classed predominantly into the cashmere lines, however at the last shearing fleeces were classed predominantly into the cashgora lines. Group 2 fleeces at the first shearing were classed equally into cashmere and cashgora lines but by the last shearing fleeces were classed into cashgora and mohair lines. Group 2 returned an additional fibre return of $4.80 at the first shearing but thereafter the fleece returns were similar in the two groups.

Keywords: NZSAPAB; Goats; cashgora; cashmere; fibre diameter; yield; fleece weight; down weight; fibre classing


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