[Show abstract][Hide abstract] ABSTRACT: An experiment was conducted in order to investigate the effects of different levels of enzyme (control and 500 g/ton) and different levels of barley (0, 20 and 40% in ration) on broiler performance in a completely randomized design. Body weight and feed conversion ratio were measured weekly, and in the end of week 6, a hen and a rooster were slaughtered and the carcass percent and abdominal fat were measured. The result showed that for up to six weeks, the control ration caused better body gain besides the ration of the enzyme that has the same effect. Feed conversion ratio was the best in the ration that did not have barley (Control), while it was the worst in the ration that had 40% barley. It was observed that different levels of barley had no effect on carcass percent, but they had significant effect on abdominal fat; whereas different levels of enzyme resulted to increase in carcass percent, but they had no effect on abdominal fat.
Preview · Article · Sep 2011 · African journal of agricultural research
[Show abstract][Hide abstract] ABSTRACT: The present study investigated the occurrence of autosomal recessive genetic disease, factor XI (FXI), in Khuzestan native cows and Iranian Holstein cattle. Genomic DNA was isolated from the blood of the cows (n = 330). Exon 12 of the Factor XI gene of the cows was amplified by polymerase chain reaction (PCR). Additionally, all cows were confirmed by DNA sequencing to determine existence of mutant FXI allele. Normal cattle have only one DNA fragment of 244 bp while heterozygous cattle exhibited two DNA fragments of 320 and 244 bp for the FXI gene deficiency. The results of this study showed that none of the animals were carriers of FXI deficiency. Because of the economical significance of the FXI mutation and its recessive mode of inheritance, attention has to be paid to any case of a bull having in his origin any known FXI carrier. Although we did not observe any carrier, widespread screening programs for detection of genetic disorders seems necessary.
Full-text · Article · Feb 2011 · AFRICAN JOURNAL OF BIOTECHNOLOGY
[Show abstract][Hide abstract] ABSTRACT: The present study investigated the occurrence of autosomal recessive genetic diseases, BLAD, DUMPs and CVM in Khuzestan native cows and Iranian Holstein cattle. Genomic DNA was isolated from the blood of the cows (n=330). The polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis was performed to identify carriers of BLAD, CVM and DUMPs diseases. Then to determine existence of mutant, all cows were confirmed by DNA sequencing. This study showed that none of the cows were carriers or mutants of BLAD, DUMPs and CVM deficiency. It is possible that with the mounting selection pressure, the international gene pool may diminish and consequently the risk of dissemination of inherited defects will increase. It is therefore recommended to screen breeding bulls for their breed-specific genetic diseases before they are inducted in artificial insemination programes, to minimize the risk.
No preview · Article · Jan 2011 · Global Veterinaria