Objective: The aim of this study is to determine genetic correlations between linear type traits, yield characteristics and first lactation profitability for use in selection programs. Material and Methods: The research was carried out in Hatay province between 2012-2017. A total of 810 cows in the first lactation were used in the study. Analysis of variance and covariances of genetic parameters was carried out with Multivariate Limited Maximum Likelihood test. Results: The average first lactation net profit, 305-d milk yield, first calving age, conception rate at first service, and calving ease rate were determined as 540 US$, 6008 kg, 793 d, 61.6%, and 91.7%, respectively. Heritabilities of linear type and production traits ranged from 0.10 to 0.42 and 0.04 to 0.39, respectively. The genetic correlations between first lactation profitability and type traits ranged from -0.08 and 0.42, while between first lactation profitability and production traits ranged from 0.06 and 0.34. The highest genetic correlation was between first lactation profitability and central ligament (0.42), while the lowest genetic correlation was between first lactation profitability and udder depth (-0.08). The highest genetic correlation was between first lactation profitability and lactation protein yield (0.34), while the lowest genetic correlation was between first lactation profitability and conception rate at first service (0.09). Genetic correlations between type and production traits varied from -0.42 (FA and CFS) to 0.49 . Conclusion: These results showed that primiparous cows having more angular, strong fore udder attachments, strong foot and legs structure were more profitable and opportunities of selection programs by using genetic correlations between linear type traits and production characteristics. It also concluded that the first lactation profitability could be used successfully in Turkish dairy cattle breeding programs. ÖZAmaç: Bu çalışmanın amacı, ıslah programlarında kullanılmak üzere doğrusal tip özellikleri, verim özellikleri ve birinci laktasyon karlılığı arasındaki genetik korelasyonların tespitini yapmaktır. Materyal ve Metot: Araştırma 2012-2017 yılları arasında Hatay ilinde yürütülmüştür. Araştırmada toplam 810 baş birinci laktasyonda olan inek kullanılmıştır. Genetik parametrelerinin varyans ve kovaryanslarının analizi ise Multivariate Limited Maximum Likelihood testi ile gerçekleştirilmiştir. Bulgular: Ortalama inek başına birinci laktasyon net kar, 305-gün süt verimi, ilk buzağılama yaşı, ilk tohumlamada gebe kalma oranı ve kolay doğum oranı 540 US$, 6008 kg, 793 gün, %61.6 ve %91.7 olarak belirlenmiştir. Doğrusal tip özellikleri ile verim özelliklerinin kalıtım dereceleri sırasıyla; 0.10-0.42 ve 0.04-0.39 arasında tahmin edilmiştir. Birinci laktasyon karlılığı ile doğrusal tip özellikleri arasındaki genetik korelasyonlar -0.08 ve 0.42 arasında, birinci laktasyon karlılığı ile verim özellikleri arasındaki korelasyonlar 0.06 ve 0.34. arasında tahmin edilmiştir. Birinci laktasyon karlılığı ile en yüksek korelas...

In this study, Path analysis was used to determine the direct and indirect effects of some morphological traits such as wither height, sacrum height, body length, chest depth, chest girth and chest width on the weaning weight of sheep. The data was obtained from 200 heads of Awassi lambs raised in Gaziantep province. The results of the path analysis indicated that the variants of sacrum height and body length sustained the most significant effect on the weaning weight. Consequentely, chest girth and body length were the most favorable measurements to estimate weaning weight in Awassi and could be used as a reliable criteria for practical selection in Awassi lambs.

The referees list / Hakem listesi Journal of Animal Production is a peer-reviewed journal. List of referees is given in the last press issue of the year. Hayvansal Üretim hakemli bir dergi olup, hakem listesi her yılın son sayısında basılı yayınlanmaktadır. Journal of Animal Production is published two times in a year (May and November) by Ege Animal Science Association in Turkey. Detail information about Ege Animal Science Association and Journal of Animal Science could be finding from the web site of the Ege Animal Science Association or correspondence address of the journal given below. Guidelines to authors are also given at the end of each issue of the journal. Hayvansal Üretim dergisi, Ege Zootekni Derneği'nin "yaygın süreli" bir yayınıdır. Yılda iki kez (Mayıs ve Kasım aylarında) yayınlanmaktadır. Ege Zootekni Derneği ve Hayvansal Üretim dergisine ilişkin ayrıntılı ve güncel bilgiler Ege Zootekni Derneği'nin internet sitesinden veya dergi yazışma adresinden öğrenilebilir. Yazım kuralları derginin her sayısının sonunda verilmektedir.

Mobile phone use has arisen and rapidly been increased during last decades and therefore electromagnetic radiation or heat sourcing from mobile phones and its possible damages has become focus of interest. The aim of the present study was to investigate the effects of mobile phone signals on in vitro maturation of bovine oocytes. A total of 224 bovine cumulus oocyte complexes were matured in vitro and separated into two groups, and only treatment group received mobile phone signals for 100 min by calling 5 min/h. Following maturation period, oocytes were stained by fluorescent stain to assess maturation rates. The results showed that oocytes reaching Metaphase I and Metaphase II stage were 35.2±2.24 % and 48.2±2.21 % for treatment group whereas 11.9±1.45 % and 73.8±4.60 % for controls, respectively (P<0.01). In conclusion, bovine oocyte maturation has been significantly reduced by mobile phone signals.

During the thousand years of human evolution, the male to female ratio was practically equal, but it has recently changed in some way. The aim of this study was to investigate the effects of electromagnetic radiation from mobile phones on in vitro fertilization, embryo growth, and sex differentiation in cattle embryos. MII oocytes obtained from ovaries taken from slaughterhouse were used as research material. Gametes were exposed to electromagnetic fields by having a mobile phone inside the incubator that would periodically ring. On days 7 and 8, blastocyst development stages and embryo cleavage rates were evaluated. Additionally, the rates of cleavage for different time intervals after in vitro fertilization were noted. The sex determination of the embryos produced in vitro was determined by using polymerase chain reaction (PCR). As a result, it was found that exposure to radiofrequency electromagnetic fields could mainly reduce blastomere count, embryo diameter, and embryo quality rather than a having major adverse effect on the development of cattle embryos. Additionally, it was shown that exposure to electromagnetic fields appears to drastically reduce the chances of male survival.