D. NICODEMO, A. PAUCIULLO, A. CASTELLO, I. SOYSAL, M. AYTAÇ, D. Di BERARDINO

A cytogenetic study on the Angora bread of goat (Capra hircus) reared in Turkiye

Ankara Keçi ırkı Türkiye yerli hayvan genetik kaynakları acısından önemli rol oynamasına karşın bu ırkla ilgili kapsamlı bir sitogenetik çalışmaya rastlanmamıştır. Sunulan ön sitogenetik çalışma ırkın temel kromozomal yapısını araştırmak ve populasyon düzeyinde sitogenetik çalışmalara başlangıç yapmayı amaçlamaktadır. Kan kültürleri hem geleneksel metoda göre ve hem de Timidin metoduna göre düzenlenmiştir. Geleneksel ve GTG-RBA-RBG band karyotipleri elde edilerek ırkın kromozomlarının sentromer indeksleri belirlenmiştir. Band modeli karşılaştırmaları Ankara keçi ırkının keçi türü için standardize edilmiş RBA-RBG band modeli ile benzerliğini doğrulamıştır. Bu çalışma sonucunda Ankara keçisi ırkında populasyon düzeyinde sayısal ve yapısal kromozom anomalilerinin taşıyıcılarının tanımlanması, ırkın verim özeliklerinin geliştirilmesinde daha ileri düzeyde sitogenetik çalışmalara ihtiyaç duyulduğu değerlendirilmiştir.

Anahtar Kelimeler:

Angora(keçi), Türkiye, kromozom hataları, kromozomlar, keçi, Capra, karyotip

Türkiye'de yetiştirilen Ankara Keçisi (Capra hircus) ırkında bir sitogenetik çalışma

The Angora breed of goat plays an important role for the Turkiye's Native Animal genetic resources point of view; nevertheless, so far, no comprehensive cytogenetic investigation has been performed on this important economic breed. The present preliminary cytogenetic study has been conducted upon a sample of Angora goat breed reared in Turkiye in order to ascertain the basic chromosomal status of the breed and to start a cytogenetic screening at a population level. Blood cultures have been noted according to the conventional methods and synchronized with thymidine. Conventional and GTG-RBA-RBG-banded karyotypes have been produced to determine the relative length and centromeric index of the chromosomes of the breed. Banding comparison confirmed similarity of the Angora breed of goat with the established standardized RBA-RBG banding a pattern of the goat species. Further cytogenetic studies should now be addressed at a population level to identify carriers of numerical and/or structural chromosomal abnormalities in the Angora breed population for implementation of its productive and reproductive efficiency.

Keywords:

Angora, Turkey, chromosome aberrations, chromosomes, goats, Capra, karyotypes,

PDF

___

Basumatary R (2003). Cytogenetic studies on cows with fertility disorder. M.V.Sc thesis submitted to Assam agricultural University, Guwahati, Assam, India.
Bhatia S and Shanker V (1994). Y-chromosome polymorphism in Bengal goat. Small Ruminant Research 13: 55-61.
Burguete I, Di Berardino D, Lioi MB, Taibi L, Matassino D (1987). Cytogenetic observation on a Robertsonian translocation in Saanen goats. Genet Sel Evol. 19(4) 391-398.
Di Berardino D, Ronne M, Burguete I, Lioi MB, Taibi L, Matassino D (1987). R-banding pattern of the prometaphase chromosomes of the goat. The Journal of Heredity 78:225-230.
Di Berardino D and Burguete I (1998). High resolution RBA-banding comparison between early prometaphase chromosomes of cattle (Bos taurus L.) and goat (Capra hircus L.) at 700 band level. Cytogenet Cell Genet 83: 130-138.
Gustavsson I, Rockborn G (1964). Chromosome abnormality in three cases of lymphatic leukaemia in cattle. Nature 203:990. Gustavsson I (1979). Distribution and effects of the 1/29 Robertsonian translocation in cattle. J Dairy Sci 62:825-835.
Iannuzzi L, Di Meo GP, Perucatti A (1996). G- and R-banded prometaphase karyotypes in goat (Capra hircus L.). Caryologia Vol. 49, n. 3-4: 267-277.
ISCNDB (2001). International system for chromosome nomenclature of domestic bovids (2001). Cytogenet Cell Genet 92: 283.
Soysal ,M.İ.(2007)Native animal Genetic resources of Turkiye (Publication intended to submit preliminary document regarding intr.of An.G.R.of Turkiye based on regist.of An.G.R appeared on http://rega.basbakanlik.gov.tr)
Stranzinger GF, Steiger D, Kneubuhler J, Hagger C (2007). Y chromosome polymorphism in various breeds of cattle (Bos taurus) in Switzerland. J Appl Genet 48(3): 241-245.
Yadav BR (1996). Chromosomal abnormalities in farm animals in relation to reproductive disorders. Training manual on application of cytogenetic techniques in farm animals. Centre for Advanced Studies, Dairy Cattle Breeding Division, National Dairy Research Institute, Karnal, India, pp. 12-15.