Productivity assessment of sheep from the Karnobat Fine Fleece Breed by genealogical lines
Keywords:
Karnobat fine fleece breed, genealogical lines, live weight, wool yield, clean wool yield, clean fibreAbstract
Subject of the study were 341 sheep from the Karnobat Fine Fleece breed, ownership of the
Institute of Agriculture – Karnobat. The productivity of animals born between 2013 and 2017 was
analyzed. The genealogical structure of the flock included 3 breeding lines – 777, 2081 and 1825. The
main selection traits that were studies were: live weight at weaning, at 1.5 years and 2.5 years, wool
yield and staple length at 1.5, 2.5 and 3.5 years, clean wool yield and clean fibre at 1.5 and 2.5 years.
This information was collected from the Pedigree book of the farm. The data were obtained through
standard methods and instructions provided in the Instruction for control of productive traits (2011),
issued by the Association for Breeding Fine Fleece Sheep in Bulgaria. The following measurements
were made: 951 measurements of live weight, 870 measurements of wool yield and staple length and
579 samples were analyzed for clean wool yield and clean fibre. The data were processed according to
the variation statistics methods and adjusted for the influence of the year. The study on the Karnobat
Fine Fleece breed reported a positive lineage effect for the 1825 line for live weight at 1.5 and 2.5 years
– 54,100 kg and 59,230 kg and for staple length at all ages – 13.62, 11.52 and 11.40 cm. Animals from
the 2081 line exhibited higher results for the wool yield trait – 7.950 kg and 7.280 kg, clean wool yield
trait – 65.81% and 66.50% and clean fibre trait – 5.230 kg and 4.840 kg at 1.5 and 2.5 years. Minimal
linear differentiation on the basis of live weight and wool productivity traits in sheep of the Karnobat
Fine Fleece breed was found. Narrowed genetic diversity does not allow successful selection and
genetic progress on the studied traits in the population.
References
Antonova, V. (1973). Study on the histostructure of the skin and the qualities of wool in crosses between the Karnobat sheep and Caucasian rams. Doctoral dissertation. Sofia. 136. (Bg)
Balevska, R., Lazarov, V., Popov, G., Todorov, R., & Yaneva, P. (1979). The use of crosses of Australian rams in the Stavropol breed in our country and the newly created Fine Fleece breed for Southeastern Bulgaria. C: Breed structure in sheep breeding, Sofia. (Bg)
Boykovski, S., Georgiev, D., Stefanova, G., & Iliev, T. (2009). Merinos and Fine Fleece sheep breeds reared in our country. Shumen, 140. (Bg)
Boykovski, S. (2011). Breeding program for Merinos and Fine Fleece sheep in Bulgaria. pp. 36. (Bg)
Boykovski, S., Stefanova, G., Tsonev, T., & Anev, G. (2012). Productivity of Fine Fleece sheep reared in Bulgaria. Shumen, 150. (Bg)
Boykovski, S., Georgiev, D., & Tsonev, T. (2015). Askanian sheep breed. Shumen, 143. (Bg)
Boykovski, S., Georgiev, D., & Tsonev, T. (2018). Influence of the Australian Merino and Booroola breeds on the productivity and fertility of Fine Fleece sheep. Shumen, 162. (Bg)
Dimitrov, D. (2006). Wool yield and natural wool length of sheep from the North East Bulgarian Fine Fleece breed – Shumen type. Bulgarian Journal of Animal Husbandry, 2, 27-32. (Bg)
Dimitrov, P. (1987). Study on the phenotypic and genetic parameters of the factory-breeding herd in the village of Veselinovo, Yambol district and basic principles of selection for its improvement. Doctoral dissertation, Sofia, 144. (Bg)
Iliev, M. (1999). Study on the effect of genetic and non-genetic factors on productivity and selection system in sheep of the Karnobat Fine Fleec breed with a view to its preservation and improvement. Doctoral dissertation. Sofia. 156. (Bg)
Iliev, M. (2001). Characteristics of Karnobat Fine Fleece sheep lines. Bulgarian Journal of Animal Husbandry, 1, 93-96. (Bg)
Iliev, M. (2010). Productive characteristics of sheep from Karnobat Fine Fleece breed. Bulgarian Journal of Animal Husbandry, 2, 22-27. (Bg)
Iliev, M., Slavova, P., Laleva, S., & Krastanov, Z. (2017). Fattening and slaughter qualities of the lambs by Karnobat local breed and crosses with Karnobat fine wool breed. Zhivotnov’dni Nauki/Bulgarian Journal of Animal Husbandry, 54(1), 3-9.
Iliev, M., & Staykova, G. (2019). Study of correlations between traits, characterizing wool productivity in sheep from the Karnobat fine-wool breed. Zhivotnovadni Nauki, 56(1), 3-8.
Lazarov, V. (1981). Study on the octogenetic development of sheep, genetic and non-genetic determination of live weight and meat productivity. Doctoral dissertation. Sofia, 149. (Bg)
Mihaylova, L., Lazarov, V., Popov, G., Todorov, R., & Yaneva, P. (1979). Histostructure of the skin and certain properties of sheep of the Fine Fleece breed for South East Bulgaria with blood of Australian merinos. Increasing the milk and meat production from sheep. Sofia. 55-58. (Bg)
Panayotov, D., & Damilola, I. (2000). Condition and guidelines for the development of Fine Fleece sheep farming in Bulgaria. Association for breeding Fine Fleece sheep in Bulgaria /Material for constituent assembly/. (Bg)
Slavov, R. (2007). Opportunities for improvement of sheep from the North-eastern Bulgarian fine-fleece breed–Dobrudjan type (Doctoral dissertation, Doctoral dissertation, PhD Dissertation, Stara Zagora).
Slavova, P. (2000). Study on the variability of the selection traits in sheep from the Thracian fine fleece breed and possibilities of improvement by crossing with Australian merino rams (Doctoral dissertation, Dissertation, S., 189 pp.(Bg)).
Slavova, P., Dimova, N., Peeva, J., Laleva, S., & Popova, J. (2012). Study the relationship between certain exterior measurements, body condition and productivity in sheep of Thracian Fine Fleece breed. Bulgarian Journal of Animal Husbandry, 2, 3-11. (Bg)
Slavova, P., Dimitrov, I., Laleva, S. & Popova, J. (2016). Study the dynamics in the change of wool yield in sheep of the Thracian Fine Fleece breed. Bulgarian Journal of Animal Husbandry, 3-6, 52-58. (Bg)
Slavova, P. (2019). Thracian Fine Fleece breed of sheep in the Agricultural Institute – Stara Zagora. Stara Zagora, 144. (Bg)
Staikova, G., & Stancheva, N. (2010). Phenotypic and genotypic characteristic of the main productive traits of the Ascanian sheep breed. Zhivotnov’dni Nauki, 47(5), 16-21.
Stancheva, N., Slavova, P., Laleva, S., Krustanov, J., Iliev, M., Staikova, G., Kalaydzhiev, G., & Tzonev, T. (2015). Present status, development and productivity of Bulgarian fine fleece of sheep breeds in some herds of Agricultural Academy. Animal Science, 5, 62-71.
Tsonev, T. (2014). A productive feature of Fine Fleece sheep grown in Bulgaria. Doctoral Doctoral dissertation. Sofia, pp. 124. (Bg)
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