Search

Genetic parameters of test day (from birth to sixth month) body weight and body size parameters of Saanen kids were estimated by random regression with third order Legendre polynomial. The analyses were applied to 2673 test day records of 382 Saanen kids (Twin = 328; Single = 54; Female = 204; Male = 178) in a private dairy goat farm in Samsun, at the black Sea region of Turkey. Permanent environmental variances were static for height at sacrum, height at withers and chest depth, increased for body weight and body length on time. Heritability values ranged from 0.2679 to 0.6135 for body weight and Height at withers. Genetic correlations changed between 0.725 and 0.979 in all traits. The positive high genetic correlations among traits suggested that selection for any one of these traits would result in considerable positive change in other traits. [ABSTRACT FROM AUTHOR]

The aim of this study was to investigate the effects of sperm from different bulls on the developmental competence, blastosist quality and cell number of bovine embryos in vitro. In vitro matured bovine oocytes were fertilized with frozen-thawed sperm from five different bulls of Austrian Simmental Fleckvieh and then cultured in Synthetic Oviduct Fluid (SOF) medium at 38.5°C, 5% CO2, 5% O2 and 90% N2 atmosphere with high humidity for 8 days. In the present study, there was no significant effect of bull variations on cleavage, morula, morula/cleavage, blastocyst and blastocyst/cleavage rates of embryos. Additionally, ICM cell numbers and ICM/total cells ratio of blastocysts obtained from in vitro fertilized oocytes with five bull's sperm were similar. However trophectoderm and total cell numbers of blastocysts obtained from in vitro fertilized oocytes with bull 5 sperm were lower than other bulls (P<0.05). In the present study, blastocysts quality was affected by bull variations and the percentage of excellent or good quality blastosist (Grade I) were lower (P<0.05) in embryos from fertilized oocytes with bull 5 sperm than those of other bulls, but the percentage of low quality blastosist (Grade III) were higher (P<0.05). There was a positive correlation between quality and total cell numbers of blastocysts in experimental groups. Result of present study showed that developmental competence of embryos in vitro were not affected by bulls variations, but may be influence blastocyst quality and cell numbers of blastocyst. [ABSTRACT FROM AUTHOR]

Copyright of Kafkas Universitesi Veteriner Fakultesi Dergisi is the property of University of Kafkas, Faculty of Veterinary Medicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)