To counteract this, diets are supplemented with inorganic phosphorus and phytase.
The ability to replace high dietary calcium concentrations with lower dietary calcium concentrations supplied by a highly soluble calcium source has the potential to alleviate the problems associated with high dietary calcium while maintaining optimal bird performance and skeletal health.
We tried to explain the phenotype variance in genomic level, and explored the candidate genes for cattle growth and carcass traits using genome-wide association studies analysis.
This study detected a total of 18 candidate genes and their harboured associated regions, which will facilitate mark-assist selection in Chinese Simmental cattle.
Elevated concentrations of methaemoglobin indicate that replacing urea with nitrate in supplements for use in the northern rangelands is inappropriate where supplement intake cannot be controlled and forage quality is seasonally variable.
High dietary calcium concentrations in poultry diets have a negative effect on bird performance, due mainly to a reduction in phytate-phosphorus digestibility.
Genetic parameters for docility score were estimated using a threshold animal model from a Bayesian analysis.
The heritability of docility score was estimated as 0.21 and 0.39 in Angus and Limousin, respectively.
The activity of MMP-2 collagenase (but not of MMP-9) was higher on Day 1 after the induced ovulation than on Day 5, inversely to the collagen concentration, demonstrating that activation of MMP-2 is a key factor of cervical collagen remodelling in anoestrous ewes around induced ovulation.
The cryopreservation process compromises the sperm DNA integrity, and spermatozoa with a high level of damaged DNA might have low potential for fertilization.
In this study the comet tail measures were used to assess the extent of DNA damage to frozen-thawed spermatozoa and detected marked inter-boar variability to cryo-induced sperm DNA damage.
It can be suggested that the comet-assay parameters have the potential to be a powerful tool to improve the sperm evaluation of post-thaw semen quality.
The optimum substitution rate of ground corn grain with steam-flaked sorghum grain was 2/3 (DM basis).