搜索结果: 1-15 共查到“动物学 Selection”相关记录18条 . 查询时间(0.125 秒)
Lizard blizzard survivors tell story of natural selection（图）
Lizard blizzard survivors tell story natural selection
2017/9/4
An unusually cold winter in the U.S. in 2014 took a toll on the green anole lizard, a tree-dwelling creature common to the southeastern United States. A new study offers a rare view of natural selecti...
Factors Affecting the Incidence of Angel Wing in White Roman Geese: Stocking Density and Genetic Selection
Angel Wing Stocking Density Genetics White Roman Geese
2016/7/27
The present study investigated stocking density and genetic lines, factors that may alter the severity and incidence of angel wing (AW), in White Roman geese. Geese (n = 384) from two genetically sele...
Selection of Sahiwal Cattle Bulls on Pedigree and Progeny
Sahiwal Cattle Bull Selection Pedigree Progeny Milk Yield
2016/4/25
The objective of the study was to compare ranking of Sahiwal bulls selected on the basis of highest lactation milk yield of their dams with their estimated breeding values (EBVs) using an animal model...
Selection for Duration of Fertility and Mule Duck White Plumage Colour in a Synthetic Strain of Ducks (Anas platyrhynchos)
Duck Duration of Fertilization Fertility Selection Plumage Colour
2016/5/18
A synthetic strain of ducks (Anas platyrhynchos) was developed by introducing genes for long duration of fertility to be used as mother of mule ducklings and a seven-generation selection experiment wa...
Genomic Selection for Adjacent Genetic Markers of Yorkshire Pigs Using Regularized Regression Approaches
Pig, Litter Size Single Nucleotide Polymorphism Regularized Regression
2016/5/17
This study considers a problem of genomic selection (GS) for adjacent genetic markers of Yorkshire pigs which are typically correlated. The GS has been widely used to efficiently estimate target varia...
Selection and Crossbreeding in Relation to Plumage Color Inheritance in Three Chinese Egg Type Duck Breeds (Anas Platyrhynchos)
Egg-type Ducks Plumage Color Inheritance Crossbreeding Selection
2016/5/17
In China and South East Asia, the duck (common duck) is important in egg production for human consumption. Plumage color is a breed characteristic and of economic importance, together with egg product...
Empirical Selection of Informative Microsatellite Markers within Co-ancestry Pig Populations Is Required for Improving the Individual Assignment Efficiency
Microsatellite Markers Pigs Assignment Test
2016/5/16
The Lanyu is a miniature pig breed indigenous to Lanyu Island, Taiwan. It is distantly related to Asian and European pig breeds. It has been inbred to generate two breeds and crossed with Landrace and...
Selection of Reference Genes for Gene Expression Studies in Porcine Whole Blood and Peripheral Blood Mononuclear Cells under Polyinosinic:Polycytidylic Acid Stimulation
Peripheral Blood Mononuclear Cells (PBMC) Polyinosinic:Polycytidylic Acid
2016/5/16
Investigating gene expression of immune cells of whole blood or peripheral blood mononuclear cells (PBMC) under polyinosinic:polycytidylic acid (poly I:C) stimulation is valuable for understanding the...
Selection of Reliable Reference Genes for Real-time qRT-PCR Analysis of Zi Geese (Anser anser domestica) Gene Expression
Reference Genes Real-time qRT-PCR Zi Geese Gene Expression
2016/5/11
Zi geese (Anser anser domestica) belong to the white geese and are excellent layers with a superior feed-to-egg conversion ratio. Quantitative gene expression analysis, such as Real-time qRT-PCR, will...
Lactation Persistency as a Component Trait of the Selection Index and Increase in Reliability by Using Single Nucleotide Polymorphism in Net Merit Defined as the First Five Lactation Milk Yields and Herd Life
Economic Weights Milk Yield Persistency Herd Life Selection Index
2016/5/10
We first sought to clarify the effects of discounted rate, survival rate, and lactation persistency as a component trait of the selection index on net merit, defined as the first five lactation milks ...
Development of an Integrated General Model (IGM) System for Comparison of Genetic Gains from Different Bull Selection Strategies for Korean Brown Cattle (Hanwoo)
Breeding Scheme Hanwoo Integrated General Simulation Model Simulation
2016/5/9
To advance the effectiveness of the current Hanwoo improvement system, we developed a general simulation that compared a series of breeding schemes under realistic user circumstances. We call this sys...
Prey Selection by African Catfish Clarias gariepinus (Burchell, 1822) Larvae Fed Different Feeding Regimes
Clarias gariepinus prey selectivity rotifer copepod betaine
2010/3/26
Live prey selection by African catfish, Clarias gariepinus, larvae was examined under laboratory conditions. Larvae were offered plankton, plankton + trout starter (TS) and plankton + betaine suppleme...
Multi Trait Selection with Restriction for Cutup Carcass Value in Broiler Chicken: Genetic Relatedness of Lines Involved Based on Randomly Amplified Polymorphic DNA
Broiler Chicken Selected Lines Cutup Carcass Genetic Relatedness RAPD Markers
2016/4/20
Five broiler chicken lines, namely HC, BPB2, CPB2, PB2 and UM1, involving in a selection program and differing in selection intensity and genetic background, were screened for randomly amplified polym...
Effect of Family Size and Genetic Correlation between Purebred and Crossbred Halfsisters on Response in Crossbred and Purebred Chickens under Modified Reciprocal Recurrent Selection
Response Genetic Gain M-RRS Genetic Correlation
2016/4/18
Response in a modified reciprocal recurrent selection scheme for egg production was evaluated considering variable family sizes and genetic correlation between purebred and crossbred half sisters. The...
Genetic Status of ESR Locus and Other Unidentified Genes Associated with Litter Size in Chinese Indigenous Tongcheng Pig Breed after a Long Time Selection
Chinese Tongcheng Pigs ESR Locus Litter Size Heritability Breeding Value
2016/4/15
The Tongcheng pig breed is a famous Chinese indigenous breed. The Ministry of Agriculture of China has filed it as 1 of 19 national key conservation breeds selected from more than 100 Chinese indigeno...