Ile de France IF X Akkaraman AK G 1 Erkek Kuzularının Testis Özelliklerine Ait Katılım Dereceleri

Öz

Bu araşt ı rmada, Ile de France IF x Akkaraman AK G İ erkek kuzularda baz ı testis özelliklerine ait kal ı t ı m dereceleri tahmin edilmi ştir. Kesimden önce saptanan testis özelliklerinden sol ve sa ğ testis çap ı , sol ve sa ğ testis uzunluğu, sol ve sa ğ testis hacmi ve skrotum çevresine ili şkin kal ı t ı m dereleri s ı ras ı yla 0,21, 0,24, 0,04, 0,00, 0,31, 0,15 ve 0,00 olarak tahmin edilirken, kesimden sonra saptanan testis özelliklerinden sol ve sa ğ testis hacmi, iki testis a ğı rl ığı , sol ve sağ testis çevresi ve iki testis çevresine ait kal ı t ı m dereceleri s ı ras ı yla 0,05, 0,00, 0,00, 0,33, 0,27 ve 0,00 olarak tahmin edilmi ştir.

Anahtar Kelimeler

• erkek kuzu
• testis özellikleri
• kal ı t ı m derecesi

Heritabilities of Testes Characteristics of Ile de France IF x Akkaraman AK B i Male Lambs

Abstract

In this research,the heritabilities of some testes characteristics in Ile de France IF x Akkaraman AK Bİ male lambs were estimated. While the heritabilities of left and right testes diameters, left and right testes lengths, left and right testes volumes and scrotal circumference determining before slaughtering were estimated as 0,21, 0,24, 0,04, 0,00, 0,31, 0,15 and 0,00,respectively, the heritabilities of left and right testes volumes, both testes weights, left and right testes circumference determining after slaughtering were estimated as 0,05, 0,00, 0,00, 0,33, 0,27 and 0,00, respectively.

Keywords

• male lamb
• testes characteristics
• heritability

References

1. Alshorepy, S. A. and D. R. Notter, 1996. Genetic variation and covariation for ewe reproduction, lamb growth and lamb scrotal circumference in a fall-lambing sheep flock. J. Animal Sci., 74 (7) 1490-1498.
2. Ayied, A. Y., H. A. Abdul Latif and M. N. R. AL- Saigh. 1994. Genetical and environmental relationship among testicular measurements and body weight of arabi lamat different ages. Indi. J.of Animal Sci., 64 (3) 285-289.
3. Fogarty, N. M., D. D. Lunstra, L. D. Young and G. E. Dickerson, 1980. Breed effects and heritability of testes measurements in sheep. J. Anim. Sci, 55 (Suppl.1) 117 (Abstr).
4. Fosceco, S. C. and D. R. Notter, 1995. Heritabilities and genetics correlations of body weight, testes growth and ewe lamb reproductive traits in crossbred sheep. Animal Sci., 60 (2) 185-195.
5. Harvey, W. R. 1987. User's Guide for LSMLM-WPC-1 Version Mixed Model Least Squares and Maximum Likelhood Computer Program. Ohi State Univ. Columbus, Mimeo.
6. Kaymakç ı , M., C. Sar ı can ve O. Karaca, 1988. Ac ı payam erkek kuzular ı nda testis özellikleri üzerinde araşt ı rmalar. Ege Üniv. Ziraat Fak. Dergisi, 25, 2, 109-123.
7. Knight, T. W. 1997. Methods for the indirect estimation of testes weight and sperm numbers in marino and romney rams. New Zeland J. of Agricultural Research, 20, 291-297.
8. Land, R. B. and W. R. Carr, 1975. Testes growth and plasma LH contration following hemicastration and its relation with female prolificacy in sheep. J. Reprod. Fertil, 45,495.

9. Land, R. B. 1973. The expression of female sex limited characters in the male. Nature, 241, 208-209.
10. Lee, G. J. and C. S. Halley, 1990. Body weight adjusted testes size as a selection criterion to improve production efficiency in sheep. Proceedings of the 4thWorld Congress on Genetics Applied to Livestock Production. Edinburg 23-27 July.
11. Nowasowki, P. and A. Cwikla, 1994. Seasonal variation in testes size in polish merino rams and its relationship to reproductive performance in spring. Theriogenology, 42 (4) 613-622.
12. Sönmez, R. ve M. Kaymakç ı , 1997. Koyunlarda Döl Verimi. Ege Üniv. Ziraat Fak. Yay. No: 404. İ zmir.