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2 edition of Some genetic and environmental factors affecting performance and carcass measurements in swine found in the catalog.

Some genetic and environmental factors affecting performance and carcass measurements in swine

David Tupper Spurr

Some genetic and environmental factors affecting performance and carcass measurements in swine

by David Tupper Spurr

  • 363 Want to read
  • 32 Currently reading

Published .
Written in English

    Subjects:
  • Swine -- Breeding.

  • Edition Notes

    Other titlesSome genetic and environmental factors affecting ... swine.
    Statementby David Tupper Spurr.
    The Physical Object
    Pagination119 leaves, bound :
    Number of Pages119
    ID Numbers
    Open LibraryOL14328331M

    Identifying and evaluating alternative genetic sources can be a daunting task for producers. Large numbers of live animal and semen suppliers exist, and all claim to have the ideal genetic package to meet the industry needs. While the claims may indeed be true, producers must be able to understand the fundamental process of evaluating genetic “value” and how genetic improvement principles. 1) sow productivity (number in litter/litter weight at 21 days), 2) growth weight, 3) feed efficiency, 4) carcass traits (pounds of acceptable-quality pork), 5) skeletal soundness ___________ in swine is widely used whereby the outstanding traits of 2+ breeds are combined and heterosis increases the pounds of market pigs sold per litter.

    Poultry production and the environment – a review 3 without litter are sold for VND4 to 6 while 20 kg bags of manure with litter are sold for VND1 to 2 Local disturbances Poultry facilities are a source of odour and attract flies, rodents and other pests that create local nuisances and carry Size: 2MB.   The classical twin design is a natural experiment that relies on the different levels of genetic relatedness between monozygotic (MZ) and dizygotic (DZ) twins to estimate the relative contribution of genetic and environmental factors to individual differences in a phenotype of interest, in this case nutrient by:

    A review of feed efficiency in swine: biology and application John F. Patience*, Mariana C. Rossoni-Serão and Néstor A. Gutiérrez genetic selection solely for improved feed efficiency may reduce growth rate [5]. Another example Failure to appreciate basic factors affecting the measurement of feed efficiency can lead toCited by: Table 2 presents the heritabilities and genetic and phenotypic correlations for growth, carcass, and quality traits. The growth traits - feed conversion ratio (FCR), average daily gain (ADG), days to pounds (D), pH, tenderness of cooked pork (TEND), Minolta color (COLOR), and drip loss (DRIP) - are all moderately heritable.


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Some genetic and environmental factors affecting performance and carcass measurements in swine by David Tupper Spurr Download PDF EPUB FB2

The level of performance did not increase, over the period studied, for any of the traits studied except loin eye area. The lack of increase in level of performance may be due to a lack of sufficient selection pressure, detrimental environmental effects or the depression in performance due to by: 1.

Some genetic and environmental factors affecting performance and carcass measurements in swine the effects of population structure\ud and inbreeding on the components of phenotypic variance and\ud heritability for measures of litter size and average daily gain.\ud The Oregon State University swine herd is composed of a\ud partly closed line.

SOME GENETIC AND ENVIRONMENTAL FACTORS AFFECTING PERFORMANCE AND CARCASS MEASUREMENTS IN SWINE I. INTRODUCTION Performance merit in livestock is determined by their capacity for economical reproduction and production. In swine this is a com-posite of fecundity, liveability, rate of gain, efficiency of feed utiliza-tion and carcass quality.

A Genetic analysis of carcass and production traits in swine James Stephen Brinks Iowa State University The purpose of this study is to investigate the genetic and environmental factors influencing production end carcass cass weight on various carcass measurements, using data con­ Cited by: 1.

is due to both genetic and environmental factors that affect both traits. For example, availability of food or exposure to disease organisms probably af-Figure 1. A diagrammatic representation of the proportion of phenotypic differ-ences, which are expected to be due to differences in breeding value for a trait with a heritability of   In this paper, we evaluated the power of microbiome measures taken at three time points over the growth test period (weaning, 15 and 22 weeks) to foretell growth and carcass traits in Cited by: 3.

The aim of this study was to characterize the genetic (crossbreeding and additive genetic) and environmental factors affecting reproduction of sows on an outdoor production system.

Data from the Experimental Swine Unit of Facultad de Agronomía, Progreso, Uruguay, were by: 2. being evaluated, is a necessity in pig improvement schemes. There is a paucity of information on non-genetic factors affecting carcass characteristics of centrally tested pigs in South Africa.

The purpose of this study was to evaluate non-genetic effects on growth and carcass traits within the two major South African commercial pig breeds. The environmental component is not passed from parent to progeny and, therefore, needs to be accounted for when determining the genetic value of an animal.

Some of the environmental factors such as parity of sow or sex can be accounted for mathematically. However, other factors such as health, management and feed cannot be accounted for as easily. Genetic Relationships Between Performance Traits. For genetic improvement through selection, variation amongst animals is required.

Variation observed in a population is composed of two primary factors, genotype and environment. Conventional selection relies on the fact that use of exceptional individuals, as parents of the next generation will.

To improve growth rate and carcass performance some farmers have begun cross-breeding wild boar with domestic pigs within their breeding programme, known as hybrids.

Abiotic environmental factors, such as temperature or radiation, are impractical to control in an outdoor production : M. Jordana Rivero, Vicente Rodríguez-Estévez, Silvana Pietrosemoli, Cecilia Carballo, Andrew S.

Cook. A study was conducted to establish non-genetic factors affecting growth and carcass traits in Large White and Landrace pigs.

This study was based on 20 and 12 growth and 5 and 2 carcass data collected on performance tested pigs between and from Large White and Landrace breeds respectively. The traits analyzed were backfat thickness (BFAT), test period gain Cited by: 6.

Outline. Introduction Domestication of swine and breed development Methods of selection and mating systems Traits of economic importance Initial development of molecular genetic approaches QTL, candidate genes and genetic improvement Sequencing the pig genome Genomic selection Databases Cloning, transgenics, gene editing, and breeding pigs as Author: Benny E.

Mote, Max F. Rothschild. There are many factors involved in reaching good feed efficiency including genetic, diet, feed, management, housing and environment.

Temperature is the single most important environmental. After live estimates were statistically compared with carcass measurements, the coefficients of determination of either a weight-adjusted or a weight-unadjusted basis indicated that trained personnel could account for more than half of the variation in carcass traits and that their estimates account for, on the average, over twice the variation accounted for by untrained personnel.

The pig’s performance is the result of two influences: genetics and environment. Because the genetics of a pig plays an important role in its performance and meat quality, all pig producers should be familiar with the potential and application of genetic selection.

More recently, swine breeding programs have aimed to include pork quality and novel carcass (e.g., specific primal cuts such as the Boston butt or belly that are not commonly used in selection indexes) and belly traits together with growth, feed efficiency and carcass leanness in the selection indexes of terminal-sire lines, in order to efficiently produce pork with improved quality at a low.

For example increased growth rate in pigs is often associated with increased fat deposition. The total phenotypic relationship is due to both genetic and environmental factors that affect both traits. For example, availability of food or exposure to disease organisms probably affects both growth and backfat, but some genes also affect both traits.

Factors influencing litter size in pigs Article in CAB Reviews Perspectives in Agriculture Veterinary Science Nutrition and Natural Resources 10() April with Reads How we measure. The measurement of backfat thickness by live probing techniques is comparatively recent (Hazel and Kline, ), so that most studies of backfat thickness are based on carcass rather than live measure­ ments.

While the two measurements are not identical they are highly correlated. Carcass traits such as backfat thickness are, in general, moreAuthor: David Frame Cox. INTRODUCTION. The demand for higher quality meat by consumers has been steadily growing. Both meat quality and carcass composition traits are becoming important in swine breeding programs because of their increased economic value (Dransfield et al., ).Until the recent past, producers were paid for the weight of carcass as opposed to the weight of each primal cut (Miar et Cited by: 2.Genetic and environmental influences on growth Table 1 Independent variables included in the analysis of data on height Table 2 Final model using stepwise regression procedurein the representative sample (England and Scotland combined) and the inner city sample.

The dependent variable child's height is expressedin standard deviation units.Start studying Animal Genetics. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. The more accurate the measurement of performance in a trait the increase heritability and repeatability.

3. must adjust for environmental factors. Three factors that determine magnitude of selection.