Sima Savar Sofla; Mahnaz Salehi
Volume 18, Issue 3 , October 2016, , Pages 635-646
Abstract
This was a study to investigate quantitative and qualitative characteristics of fiber extracted from crossbred goats derived from female hair goats indigenous of Qom and male Cashmere goats of South of Khorasan. From a total of 75 indigenous and cross goats aged 1-3, qualities such as the percentage ...
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This was a study to investigate quantitative and qualitative characteristics of fiber extracted from crossbred goats derived from female hair goats indigenous of Qom and male Cashmere goats of South of Khorasan. From a total of 75 indigenous and cross goats aged 1-3, qualities such as the percentage of cashmere in fleece, percentage of hair in fleece, hair staple length, cashmere staple length, cashmere fiber length, hair fiber length, and fiber diameter was investigated. Taking into account the effect of genetic group, sex and age characteristics, the data were analyzed with SAS software. The average fleece weight of goats was 300.2 ± 19.4 grams with a minimum of 99 and maximum of 713 grs. The length of hair fiber in the male goats fleece (12.8 ± 0.7 cm) was more than female ones (10.2 ± 0.5 cm); It was 12.0 ± 0 .6, 10.3 ± 0.4 and 12.2 ± 1.1 cm in indigenous goats, first and second generation cross goats respectively. The fleece weight in crossbred goats showed 21 grams increase compared to Qom indigenous goats; the difference was not statistically significant; While the percentage of cashmere in crossbred goats was almost twice as the indigenous goats (p<0.01). Based on the results, crossbreeding between the female hair goats of Qom and male cashmere goats of South of Khorasan improves the quality and quantity of extracted fiber.
Mokhtar Ali Abbasi; Sima Savar Sofla
Volume 17, Issue 1 , April 2015, , Pages 1-8
Abstract
This study was evaluated some strategies and determined the suitable selection index for Afshari sheep using simulated data. The relative importance of traits was determined based on the estimated economic values and consequently, the most benefit traits were applied to selection indexes construction. ...
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This study was evaluated some strategies and determined the suitable selection index for Afshari sheep using simulated data. The relative importance of traits was determined based on the estimated economic values and consequently, the most benefit traits were applied to selection indexes construction. The interest indexes were different combination of traits including ewe body weight (EBW), annual wools weight (AWW) and total weaning weight for each exposed ewe (TWWEE). The index 1 was included all three mentioned traits. The indexes two, three and four were included (AWW, TWWEE), (EBW, TWWEE) and (TWWEE), respectively. The results indicated that the aggregate genotype, selection index and economic progress increased by increasing in the population size and decreasing in ram ratio, but made reduction in inbreeding average, in all indexes. In more cases, the aggregate genotype decreased by removing a trait in the index. The comparisons among indexes indicated that the most suitable selection index for this breed is index 1 which included EBW, AWW and TWWEE. This index had a maximum selection index average, aggregate genotype and economic progress.