Türkiye DSYMB döl kontrolü projesinde çekirdek sürü ıslah sistemi ilkeleri uygulanarak etkinliğin artırılması olanakları konulu alt proje kapsamında aday boğa kullanımı, düvelerde doğum zorluğu ve yavrularda gelişme özelliklerine ait ön sonuçlar
Küçük Resim Yok
Tarih
2011
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Türkiye Damızlık Sığır Yetiştiricileri Merkez Birliği (DSYMB) ile Tarım ve Köyişleri Bakanlığı (TKB) tarafından yürütülen döl kontrolü projesinde çekirdek sürü ıslah sistemi ilkeleri uygulanarak aday boğaların test edilmesi aşamasındaki etkinliğin artırılması amacıyla bir alt proje yürütülmektedir. Bu makalenin amacı, söz konusu alt projede aday boğa kullanımıyla ilgili ön sonuçların ortaya konulması ve ayrıca aday boğa sperması ile gebe kalan düvelerde doğum zorluğunun ve aday boğa yavrularında gelişme özelliklerinin incelenmesidir. Haziran 2005 tarihinde başlayan alt proje Ege Üniversitesi Ziraat Fakültesi Menemen Araştırma, Uygulama ve Üretim Çiftliği Sığırcılık Ünitesinde yürütülmektedir. Anılan tarihten itibaren, yaklaşık 170 baş boğa altı dişiden oluşan Siyah Alaca sürünün büyük bölümü DSYMB’nin teste aldığı aday boğalara ait spermalarla tohumlanmakta ve boğa başına ortalama 10-15 gebelik ve sonrasında 3-5 adet kıza ait ilk laktasyon süt verim bilgileri elde edilmesi hedeflenmektedir. Diğer yandan doğum zorluğu, gelişme, dış yapı ve süt kalite özellikleri gibi ekonomik öneme sahip diğer özellikler de saptanmaktadır. Alt projenin Mart 2011 tarihine kadar olan aşamasında değişik dönemlerden toplam 53 adet aday boğaya ait spermalar kullanılarak düve ve ineklerde 746 adet gebelik elde edilmiş, bu gebeliklerden 586 adet buzağı doğmuştur. Aday boğa sperması ile gebe kalan düvelerde, gerçekleşen toplam 153 adet buzağılamadan 19’u (%12.4) çok zor, 46’sı (%30.1) ise zor doğum olarak sınıflandırılmıştır. Düvelerde ortalama buzağılama yaşı 26.6 ay, ortalama buzağı doğum ağırlığı 39.8 kg’dır. Aday boğaların düve ve ineklerden elde edilen yavrularında ortalama doğum ağırlığı erkeklerde 41.8 kg, dişilerde 38.9 kg olarak saptanmıştır. Doğumdan 6. ay, 9. ay ve 12. aya kadar olan gelişme hızları erkeklerde sırasıyla 755.0, 767.5 ve 835.5 g/gün, dişilerde ise sırasıyla 701.6, 722.8 ve 753.0 g/gün olarak saptanmıştır. Erkeklerde 12-15. ay arası canlı ağırlık artışı ise 1066.7 g/gündür. Kullanılan aday boğaların sürüye toplam 296 adet dişi yavrusu katılmıştır. Bunlardan 108 tanesi ilk buzağılamalarını yapmış ve laktasyonun değişik dönemlerinde bulunmaktadır. Aynı döneme ait aday boğaların aynı işletmede 3-5’şer adet kız verimi ile temsil edilmesi, süt verim ölçütleri için gerçekleştirilecek damızlık değer hesaplamalarında, tahminlerin isabet derecesine belli düzeyde katkı sağlayacaktır.
A subproject has been carried out to increase the effectiveness in the progeny testing programme, which has been carried out by the Cattle Breeders Association of Turkey (CBAT) under supervision of the Ministry of Agriculture and Rural Affairs, in the stage of the young (candidate) bulls testing by using principles of nucleus breeding systems. The aims of this study are to give preliminary results related to use of young bulls in subproject mentioned above and to present dystocia rate in heifers inseminated with sperma from young bulls as well as growth characteristics in progeny of young bulls. The subproject which started on June 2005 has been carried out at the dairy cattle herd in the Menemen research farm of the Agricultural Faculty of Ege University. Since that date a big part of the Holstein herd of nearly 170 cows and heifers have been inseminated with sperma from test bulls under progeny testing programme of CBAT and it was planned to obtain 10 to 15 pregnancies and thereafter first lactation records from 3 to 5 daughters from each test bull. On the other hand, some economically important traits such as dystocia, growth performance, type traits and milk quality traits have been determined. From the beginning of the subproject to March 2011, by using sperma of 53 test bulls from different periods 746 pregnancies were obtained in heifers and cows, and from these pregnancies 586 calves were born. Of 153 calvings in heifers conceived with sperma from test bulls, 19 (12.4%) were classified as extremely difficult calving and 46 (30.1%) as difficult calving. For these heifers, mean age at calving was 26.6 months and mean calf birth weight was 39.8 kg. Mean calf birth weights of all progeny of test bulls were 41.8 and 38.9 kg for males and females, respectively. Growth performances from birth to 6, 9 and 12 months of age were 755.0, 767.5 and 835.5 g/day for males, respectively, and 701.6, 722.8 and 753.0 g/day for females, respectively. Weight gain between 12 and 15 months of age in males was 1066.7 g/day. There are 296 daughters in different ages in the herd from the test bulls. Of the daughters, 108 freshened and have been in different stages of their lactation. In the same herd, presentation of all bulls from the same period with 3 to 5 daughters will help to improve the accuracy of the breeding value estimations for milk traits.
A subproject has been carried out to increase the effectiveness in the progeny testing programme, which has been carried out by the Cattle Breeders Association of Turkey (CBAT) under supervision of the Ministry of Agriculture and Rural Affairs, in the stage of the young (candidate) bulls testing by using principles of nucleus breeding systems. The aims of this study are to give preliminary results related to use of young bulls in subproject mentioned above and to present dystocia rate in heifers inseminated with sperma from young bulls as well as growth characteristics in progeny of young bulls. The subproject which started on June 2005 has been carried out at the dairy cattle herd in the Menemen research farm of the Agricultural Faculty of Ege University. Since that date a big part of the Holstein herd of nearly 170 cows and heifers have been inseminated with sperma from test bulls under progeny testing programme of CBAT and it was planned to obtain 10 to 15 pregnancies and thereafter first lactation records from 3 to 5 daughters from each test bull. On the other hand, some economically important traits such as dystocia, growth performance, type traits and milk quality traits have been determined. From the beginning of the subproject to March 2011, by using sperma of 53 test bulls from different periods 746 pregnancies were obtained in heifers and cows, and from these pregnancies 586 calves were born. Of 153 calvings in heifers conceived with sperma from test bulls, 19 (12.4%) were classified as extremely difficult calving and 46 (30.1%) as difficult calving. For these heifers, mean age at calving was 26.6 months and mean calf birth weight was 39.8 kg. Mean calf birth weights of all progeny of test bulls were 41.8 and 38.9 kg for males and females, respectively. Growth performances from birth to 6, 9 and 12 months of age were 755.0, 767.5 and 835.5 g/day for males, respectively, and 701.6, 722.8 and 753.0 g/day for females, respectively. Weight gain between 12 and 15 months of age in males was 1066.7 g/day. There are 296 daughters in different ages in the herd from the test bulls. Of the daughters, 108 freshened and have been in different stages of their lactation. In the same herd, presentation of all bulls from the same period with 3 to 5 daughters will help to improve the accuracy of the breeding value estimations for milk traits.
Açıklama
Anahtar Kelimeler
Ziraat, Sütçülük ve Hayvan Bilimleri
Kaynak
Hayvansal Üretim
WoS Q Değeri
Scopus Q Değeri
Cilt
52
Sayı
1
