The Growth and Survival Characteristics of Lambs Produced by Commercial Crossbreeding Kıvırcık Ewes with F2 Rams with the German Black-Headed Mutton Genotype
This study was conducted to compare the growth and survival characteristics of crossbred lambs produced by mating Kıvırcık ewes with German Black-Headed Mutton (GBM) x Kıvırcık (F2) rams, GBM x Merino (F2) rams, as well as the growth and survival characteristics of purebred Kıvırcık lambs. The data were obtained from 59 (GBM x Kıvırcık) x Kıvırcık, 59 (GBM x Merino) x Kıvırcık, and 60 purebred Kıvırcık lambs. The birth weights of (GBM x Kıvırcık) x Kıvırcık, (GBM x Merino) x Kıvırcık, and purebred Kıvırcık lambs were 4.08, 4.32, and 3.85 kg, respectively. The differences of birth weight between the genotype groups were statistically significant (P < 0.001). The weaning weights of these groups were 19.33, 19.38, and 17.58 kg, respectively. The difference in weaning weights between the crossbred genotypes was not significant (P > 0.05), whereas the differences between the crossbred lambs and the purebred Kıvırcık lambs were significant (P < 0.05). The effects of genotype, birth type, sex, and age of dam on the growth of lambs were investigated. All these effects, except age of dam, were significant. Among the genotypes, 88.13%, 91.53%, and 90.00% of the lambs survived to be weaned, respectively. The results of this study showed that crossbred lambs produced by the use of F2 rams, which carry the GBM genotype, had higher growth performance than purebred Kıvırcık lambs, although they had similar survival rates.
The Growth and Survival Characteristics of Lambs Produced by Commercial Crossbreeding Kıvırcık Ewes with F2 Rams with the German Black-Headed Mutton Genotype
This study was conducted to compare the growth and survival characteristics of crossbred lambs produced by mating Kıvırcık ewes with German Black-Headed Mutton (GBM) x Kıvırcık (F2) rams, GBM x Merino (F2) rams, as well as the growth and survival characteristics of purebred Kıvırcık lambs. The data were obtained from 59 (GBM x Kıvırcık) x Kıvırcık, 59 (GBM x Merino) x Kıvırcık, and 60 purebred Kıvırcık lambs. The birth weights of (GBM x Kıvırcık) x Kıvırcık, (GBM x Merino) x Kıvırcık, and purebred Kıvırcık lambs were 4.08, 4.32, and 3.85 kg, respectively. The differences of birth weight between the genotype groups were statistically significant (P < 0.001). The weaning weights of these groups were 19.33, 19.38, and 17.58 kg, respectively. The difference in weaning weights between the crossbred genotypes was not significant (P > 0.05), whereas the differences between the crossbred lambs and the purebred Kıvırcık lambs were significant (P < 0.05). The effects of genotype, birth type, sex, and age of dam on the growth of lambs were investigated. All these effects, except age of dam, were significant. Among the genotypes, 88.13%, 91.53%, and 90.00% of the lambs survived to be weaned, respectively. The results of this study showed that crossbred lambs produced by the use of F2 rams, which carry the GBM genotype, had higher growth performance than purebred Kıvırcık lambs, although they had similar survival rates.
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- Akçapınar, H.: Koyun Yetifltiriciliği. İsmat Matbaacılık, Ankara, 2000. 2. Yalçın, B.C.: Türkiye’de koyun yetifltiriciliği ve sorunları. Doğu Anadolu Hayvancılık Sempozyumu, Elazığ. 1985; 167-176. 3.
- Altınel, A., Evrim, M., Özcan, M., Baflpınar, H., Deligözoğlu, F.:
- Studies on possibility of producing high quality lambs by
- crossbreeding among Sakız, Kıvırcık and German Black Headed
- Çep, S., Aydoğan, M.: Hampshire Down ve Alman Siyah Bafllı Etçi ırklarının Akkaraman ırkı ile kullanma melezlemesi yönünden karflılafltırılması. Lalahan Hayv. Arafl. Enst. Derg., 1998; 38: 24- 40.
- Kaymakçı, M., Sönmez, R., Kızılay, E., Taflkın, T., Ergül, N.: Investigation on developing sire lines for lamb production (first stage). Turk. J. Vet. Anim. Sci., 1999; 23: 255-259.
- Küçük, M., Ünal, N., Akçapınar, H.: Akkaraman ve Alman Siyah Bafllı Etçi x Akkaraman melezi G1kuzularda büyümeye etki eden bazı çevre faktörleri. Lalahan Hayv. Arafl. Enst. Derg., 1999; 39: 41-55.
- Öztürk, A., Aktafl, A.H.: Effect of some factors on birth weight of Konya Merino (KM) and Hampshire x KM, German Blackhead Mutton Sheep x KM and Lincoln x KM crossbred (F) lambs. Turk. J. Vet. Anim. Sci., 1996; 20: 415-418.
- Akçapınar, H., Tekin, M.E., Kadak, R., Akmaz, A., Müftüoğlu, fi.: Merinos, Alman Siyah Bafllı Etçi x Merinos, Hampshire Down x Merinos ve Lincoln x Merinos (F1) kuzuların büyüme, besi ve karkas özellikleri. Hayv. Arafl. Derg., 1992; 2: 18-23.
- Akmaz, A., Kadak, R., Tekin, M.E., Deniz, S., Nazlı, M.: Konya Merinoslarında farklı dönemlerde sütten kesmenin kuzularda büyüme ile koyunlarda süt ve yapağı verimine etkisi. Hayv. Arafl. Derg., 1992; 2: 1-7.
- Demirsoy, S., Akçapınar, H.: Kuzularda büyümeyi etkileyen çevresel faktörlerin kovaryans analizi ile incelenmesi. Lalahan Hayv. Arafl. Enst. Derg., 1997; 37: 37-55.
- Özcan, M., Yılmaz, A., Akgündüz, M.: Investigation on improving the meat production of slaughter lambs by crossbreeding studies between Turkish Merino, Chios and Kıvırcık sheep breeds. Turk. J. Vet. Anim. Sci., 2002; 26: 517-523.
- Yılmaz, A., Altınel, A.: The effects of some environmental factors affecting on the milk production and growth characteristics of the German Black-Headed Mutton x F1 (Chios x Kıvırcık) crossbreds in comparison with Kıvırcık and Turkish Merinos. İstanbul Üniv. Vet. Fak. Derg., 2003; 29: 259-266.
- Sönmez, R., Kaymakçı, M., Türkmut, L., Sarıcan, C.: The possibilities of developing dam and sire lines for lamb production. Turk. J. Vet. Anim. Sci., 1991; 16: 121-132.
- Kızılay, E.: Batı Anadolu ve Trakya’da yetifltirilen koyun tiplerinin verimle ilgili özellikleri ve bölge koflullarına uygunlukları üzerinde mukayeseli arafltırmalar. Ege Üniv. Zir. Fak. Derg., 1976; 13: 217-232.
- Kutsal, A., Alpan, O., Arpacık, R.: İstatistik Uygulamalar, Bizim Büro Basımevi, Ankara, 1990.
- Harvey, W.B.: Least-squares of Data with Unequal Subclass Number. Report of Agricultural Research Service H-4, USDA, 1975.