搜索结果: 1-15 共查到“畜牧学 selection”相关记录32条 . 查询时间(0.134 秒)
Claw health and feed efficiency as new selection criteria in the Czech Holstein cattle Krupová Z., Wolfová M., Krupa E., Přibyl J., Zavadilová L.
dairy cattle breeding objective selection index economic weights prognosis
2018/11/23
The objective of this study was to calculate economic weights for ten current breeding objective traits and for four new traits characterising claw health and feed efficiency in Czech Holstein cattle ...
Response to selection of a breeding program for Suffolk sheep in the Czech Republic
lamb breeding values growth performance traits performance recording
2018/11/23
Lamb growth performance traits in relation to parental breeding values (BVs) for these traits were evaluated in a purebred Suffolk sheep population in the Czech Republic. The research lasted over 8 ye...
Genetic correlations between first parity and accumulated second to last parity reproduction traits as selection aids to improve sow lifetime productivity
Breeding Swine Genetic Parameters Reproduction Traits Subsequent Reproductive Performance
2017/3/9
The objective of this research was to estimate genetic correlations between number of piglets born alive in the first parity (NBA1), litter birth weight in the first parity (LTBW1), number of piglets ...
Validation of selection accuracy for the total number of piglets born in Landrace pigs using genomic selection
Genomic Selection Total Number of Piglets Born Landrace
2017/3/8
This study was to determine the relationship between estimated breeding value and phenotype information after farrowing when juvenile selection was made in candidate pigs without phenotype information...
Optimization of Swine Breeding Programs Using Genomic Selection with ZPLAN+
Breeding Program Genomic Selection Swine ZPLAN+
2016/5/20
The objective of this study was to evaluate the present conventional selection program of a swine nucleus farm and compare it with a new selection strategy employing genomic enhanced breeding value (G...
Offspring sex ratio in domestic goats: Trivers-Willard out of natural selection
maternal age parental investment sex allocation
2015/7/7
In the present
study we have analyzed an extensive data set on the secondary sex ratio (SSR) including 59 335 goat kids born
in 30 633 litters to 11 644 mothers on farms all over the Czech Republi...
Influence of mating systems and selection intensity on the extent of inbreeding and genetic gain in the Slovak Pinzgau cattle
Pinzgau breed mating strategy breeding program optimization
2015/7/3
The aim of the present paper was to simulate the scenarios for a maximum avoidance of inbreeding (MAI) mating strategy, and compare it with a random mating alternative, with the main focus on inbreedi...
Selection of probiotic bifidobacteria for lambs
bifidobacteria lambs probiotics faecal flora
2015/6/8
Twenty-six bifidobacteria were isolated from faecal samples of lambs. The isolates were identified, functional properties (survival ability at low pH and bile conditions) and antimicrobial activities ...
Changes in egg quality traits associated with long-term selection for lower yolk cholesterol content in Japanese quail
selection yolk cholesterol egg quality traits correlations Japanese quail
2015/6/5
In the present paper we describe the basic results of long-term selection for low yolk cholesterol content in Japanese quail and its influence on development and relationship with other egg quality tr...
Selection indexes for bulls of beef cattle
beef cattle bulls genetic parameters genetic gain breeding values breeding objective selection indexes
2015/6/2
Three selection indexes were constructed for bulls of beef cattle: IM for terminal crossing (in dairy herds), IZ for the selection of foundation sires for beef herd and IS for the selection of bulls f...
Selection index for bulls of Holstein cattle in the Czech Republic
selection index Holstein cattle bulls
2015/6/1
Complex selection indexes are proposed for bulls of Holstein cattle in the Czech Republic. Partial breeding values for milk performance, fertility and body conformation are combined in the index. Conf...
The Outcomes of Selection in a Closed Herd on a Farm in Operation
Closed Herd Selection Inbreeding Genetic Progress
2016/5/18
A herd of Berkshire pigs was established in 2003 and subjected to selection without introduction of any genetic resources until 2007. The complete pedigree, including 410 boars and 916 sows, as well a...
Use of endometrial cytology and metabolic profiles for selection of embryo donor cows
serum chemistry parameters endometritis neutrophils
2014/10/28
The aim of this study was to evaluate the use of endometrial cytology and metabolic profiles for selection of donor cows in embryo transfer programmes. For this purpose, 69 clinically healthy Holstein...
Effect of Production Phase on Growth, Enzyme Activities and Feed Selection of Broilers Raised on Vegetable Protein Diet
Broiler Chickens Feed Selection Growth Vegetable Protein Visceral Organs
2016/5/17
This study consisted of two experiments, conducted to assess the impact of phase at which vegetable protein (VP) diets are introduced to broiler chicks, and preference of birds for diets based on soyb...
Identification of Recently Selected Mutations Driven by Artificial Selection in Hanwoo (Korean Cattle)
Hanwoo Signatures of Selection SNP
2016/5/11
Hanwoo have been subjected over the last seventy years to intensive artificial selection with the aim of improving meat production traits such as marbling and carcass weight. In this study, we perform...