Estimates Of Breed Differences And Genetic Parameters Of Pig Temperament Scores During A Performance Test And Its Relationship With Performance Traits
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Genetics and the Behavior of Domestic Animals
Genetics and the Behavior of Domestic Animals, Third Edition offers the latest and most valuable information on animal science and behavioral genetics, carrying on the book's legacy since its original publication in 1998. This book synthesizes research from behavioral genetics and animal and veterinary science, bridging the gap between these fields. The objective is to show that principles of behavioral genetics have practical applications to agricultural and companion animals. The continuing domestication of animals is a complex process whose myriad impacts on animal behavior are commonly under-appreciated. Genetic factors play a significant role in both species-specific behaviors and behavioral differences exhibited by individuals in the same species. Leading authorities explore the impact of increased intensities of selection on domestic animal behavior. Rodents, cattle, pigs, sheep, horses, herding and guard dogs, and poultry are all included in these discussions of genetics and behavior, making this book useful to veterinarians, livestock producers, laboratory animal researchers and technicians, animal trainers and breeders, and any researcher interested in animal behavior. Genetics and the Behavior of Domestic Animals, Third Edition is the most valuable resource for researchers and practitioners in animal and veterinary science, animal behavior, genetics, ethology, and similar fields. Advanced undergraduate and graduate students in these disciplines will also benefit from the global expertise featured in this newest edition. - Provides full and thorough updates to all chapters, ensuring dissemination of the latest data and research - Synthesizes research from behavioral genetics, animal science, and veterinary literature - Broaches fields of behavior genetics and behavioral research - Includes practical applications of principles discovered by behavioral genetics researchers - Covers many species ranging from pigs, dogs, foxes, rodents, cattle, horses, and cats
Estimates of Breed Differences and Genetic Parameters of Pig Temperament Scores During a Performance Test and Its Relationship with Performance Traits
YODER, CHAD LEWIS. Estimates of Breed Differences and Genetic Parameters of Pig Temperament Scores during a Performance Test and its Relationship with Performance Traits. (Under the direction of Dr. M. Todd See). The objective of this study was to estimate breed differences for temperament scores during a performance test, and estimate the genetic parameters associated with temperament and performance traits. Chester White (CW), Duroc (D), Landrace (L), and Yorkshire (Y) boars and gilts (n=4,774) were used to estimate breed differences in temperament and genetic parameters. Adjusted backfat (BF), adjusted loin depth (LD), days to 113.4 kilograms (DAYS), estimated percent fat-free lean (LEAN), and three temperament scores: load score (LS), scale score (SS), and vocal score (VS) were recorded. All scores ranged from 1 (calm) to 5 (highly excited). While loading into the scale LS was recorded; SS and VS were recorded while in the scale as ultrasound measurements were taken. Temperament scores were evaluated as categorical traits with statistical models including fixed effects of breed, sex, contemporary group (barn-farm-test date), and off-test weight as a covariate. Order in which pigs were loaded into the scale was included in the model for LS. After initial analysis it was determined VS was best described as two categories, vocal and non-vocal, and was analyzed as a binary trait. Statistical models for BF, LD, DAY, and LEAN included fixed effects of breed, sex, and LS, SS, or VS. Growth rate was adjusted to 113.4 kilograms, while BF and LD were adjusted to the mean weight of the respective breed. Breed differences for LS, SS, and VS were estimated as odds ratios. The odds of increased LS were greater for L (1.62, 1.30; P
Agricultural Sciences - Volume I
Agricultural Sciences is a component of Encyclopedia of Food and Agricultural Sciences, Engineering and Technology Resources in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. The theme on Agricultural Sciences with contributions from distinguished experts in the field discusses this multi-disciplinary field that encompasses the parts of exact, natural, economic and social sciences that are used in the practice and understanding of agriculture. These two volumes are aimed at the following five major target audiences: University and College students Educators, Professional practitioners, Research personnel and Policy analysts, managers, and decision makers and NGOs