A5056828417- Genetic and phenotypic traits in livestock
- Animal Behavior and Welfare Studies
- Genetic Mapping and Diversity in Plants and Animals
- Animal Nutrition and Physiology
- Effects of Environmental Stressors on Livestock
- Genetics and Plant Breeding
- Hematological disorders and diagnostics
- Linguistic Studies and Language Acquisition
- Acute Myeloid Leukemia Research
- Liver Disease Diagnosis and Treatment
- Cancer, Hypoxia, and Metabolism
- Blood disorders and treatments
- Animal Genetics and Reproduction
- Culinary Culture and Tourism
- Diet, Metabolism, and Disease
University of Nebraska–Lincoln
2018-2022
North Carolina State University
2016-2019
National Cancer Registry
2013
American Gastroenterological Association
1993-2012
American Association for the Study of Liver Diseases
2012
American College of Gastroenterology
2012
American Heart Association
1992
Abstract Numerous methods have been suggested to incorporate crossbred (CB) phenotypes and genotypes into swine selection programs, yet little research has focused on the implicit trade-off decisions between generating data at nucleus or commercial level. The aim of this study was investigate impact altering proportion purebred (PB) CB in genetic evaluations response performance. Assuming PB performance with moderate heritabilities (h2=0.4), a three-breed crossbreeding scheme simulated...
Professor See made some valuable remarks on the above subject.He divided methods of treatment into four- 1. Bouillaud's "jugulating" system (large bleedings). 2.
The objective was to evaluate 4 generations of divergent selection for age at puberty (young = YOUNG; old OLD) in swine. Composite Landrace × Large White animals (n 4,941) were reared the North Carolina Department Agriculture Tidewater Research Station. At 130 d age, gilts exposed mature boars 7 min daily. Estrous detection continued 90 d. Puberty defined as first observed standing reflex presence a boar. Reproductive and performance traits included: (AGEPUB), probability gilt reaching by...
Abstract The aim of this study was to investigate different inclusion rates purebred (PB) and CB phenotypes genotypes in genetic evaluations. Assuming PB traits with moderate heritabilities (h2 = 0.4), a three-way swine crossbreeding scheme simulated, selection practiced for 6 generations. goal increase the phenotype. Phenotypes, pedigrees three breeds (each consisting 25 males 175 females), F1 crosses (400 females) terminal cross progeny (2500) were simulated using AlphaSimR. genome...
Summary Selection for increased litter size in swine has potentially resulted a correlated increase preweaning mortality. Additional selection criteria should be considered when selecting to account associated decreases piglet quality, specifically survival, initial weight and growth. Traits such as gestation length ( GL ), which have been with performance, could utilized improve development survivability. The objective of this study was conduct genome‐wide association identify genomic...
Continued selection for increased gilt body weight could negatively impact age at puberty (AP) in gilts. The purpose of this study was to compare the genetic potential growth that reducing swine. Females utilized (n = 1,079) were produced over a 6-yr period from population developed determine energy restrictions and influences on sow development longevity. From 120 235 d age, BW collected every 14 attainment tested. Age defined as first observed standing estrus presence mature boar. All...
Abstract This study investigated using imputed genotypes from non-genotyped animals which were not in the pedigree for purpose of genetic selection and improving gain economically relevant traits. Simulations used to mimic a 3-breed crossbreeding system that resembled modern swine breeding scheme. The simulation consisted three purebred (PB) breeds A, B, C each with 25 425 mating males females, respectively. Males A females B crossed produce AB (n = 1,000), crossbreds (CB; n 10,000). genome...
Inclusion of crossbred (CB) data into traditionally purebred (PB) genetic evaluations has been shown to increase the response in CB performance. Currently, it is unrealistic collect on all animals swine production systems, thus, a subset must be selected contribute genomic/phenotypic information. The aim this study was evaluate selective genotyping strategies simulated 3-way crossbreeding scheme. scheme and produced for 6 generations with 3 distinct PB breeds each 25 175 mating males...
Selective genotyping of crossbred (CB) animals to include in traditionally purebred (PB) dominated genetic evaluations has been shown provide an increase the response selection for CB performance. However, inclusion phenotypes from selectively genotyped animals, without their non-genotyped cohorts, could cause bias estimated variance components (VC) and subsequent breeding values (EBV). The objective study was determine impact selective on VC estimates EBV when are not included evaluations....
The objective of the study was to determine impact growth and body composition traits on puberty attainment. Multigenerational records were compiled from PIC Landrace × Large White composite gilts (n = 1573) reared at NCDA Tidewater Research Station. Females housed in a curtain-sided building with fully slatted floors natural ventilation. Sprinklers activated when temperatures reached 27°C. Gilts placed pens 15 (0.84 m2 per pig). At 130 d age, each group exposed mature boars for 7 min daily,...
The objective was to evaluate the impact of divergent genetic selection for age at puberty on sow colostrum production and litter performance. Genetic lines were formed NCDA Tidewater Research Station (Plymouth, NC) by selecting gilts young (YOUNG) or old (OLD). Second parity females (n=120) from generations three four used. In generation four, YOUNG OLD 163 183 d, respectively. Females housed in modern, environmentally controlled facilities with ad libitum access water. Sows fed gestation...