This study examined two female offspring of a somatic cell cloned Holstein cow that had reproduction problems and milk production performance issues. The two offspring heifers, which showed healthy appearances and normal reproductive characteristics, calved on two separate occasions. The mean milk yields of the heifers in the first lactation period were 9,037 kg and 7,228 kg. The relative mean ...

Records of the first three lactations of cows were obtained from the file of the Dairy Herd Testing Association in Hokkaido. The data were divided into 10 files containing approximately 24,000 cows each. The derivative-free REML method was used to estimate variances with a repeatability model. The model contained herd-year, calving month, and the linear and quadratic effects of age at calving a...

BACKGROUND: Methionine has been suggested as the firstlimitingamino acid for milk production in ruminants. It is importanthow to increase milk protein yield and milk fat in dairy ruminants.OBJECTIVES: This study was set to investigate the effect of rumenprotected methionine (RPMet) on milk composition of lactatingCashmere Rayeni goats. METHODS: 40 healthy singletonCashmere Rayeni goats about 3 ...

the study was carried out on 120 crossbred holstein × shahiwal dairy cows for a period of 150 days to quantify the influence of dietary energy and protein intake on yield and composition of milk. total 12 dairy farms having similar housing systems and holding at least 20 dairy cows in between mid to late lactation were selected for study purposes. the farms were located in the peri-urban and ur...

In recent years, the production of nutritious snacks has received much attention. Food industry by-products represent an abundant source of nutrients and are often used as an animal feed. Sunflower seed meal is high in protein and essential amino acids, minerals and vitamins and mohammadi rose (R. Damascena) waste, contains high amounts of phenolic compounds. In the present study, sunflower see...

this study was aimed to determine the effects of different dietary levels of methionine and protein on the growth performance and carcass characteristics of broiler chickens. a total of 240 broiler chicks were distributed into a completely randomized design with a 2 × 3 factorial arrangement. experimental factors were: two levels of protein (20% or 24% for starter and 18% or 22% for grower), an...

The proportion of genetic variation in complex traits explained by rare variants is a key question for genomic prediction, and for identifying the basis of "missing heritability"--the proportion of additive genetic variation not captured by common variants on SNP arrays. Sequence variants in transcript and regulatory regions from 429 sequenced animals were used to impute high density SNP genoty...

The study of the link between genes controlling protein polymorphism and milk performance traits domestic animals has great economic importance from a selection point view, as it reduces generation interval, leading to increased productivity in livestock. objective this paper was establish influence genetic ? -lactoglobulin on quantity quality simmental breed Serbi?. For research blood samples ...