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Showing 1 to 15 of 15 for “"breeding value"”.
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Derivation, fertility and breeding value of doubled monoploids from the diploid potato species, Solanum phureja
… the potential for their utilization in breeding and warrants further research in the area.
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Genetic Parameters for Udder and Teat. Type Traits in Icelandic Cattle Breed
… teat structure and teat tip are not included in breeding value estimations. The main objective of this study was to estimate genetic parameters for udder and teat type traits of Icelandic Cattle, but also to describe the traits’ phenotypic structure, to estimate their genetic trends, and to …
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Improvement in accuracy using records lacking sire information in the animal model
… identification. Methods 1 and 2 assumed genetic values of cows missing sire identity were population and management group average, respectively. Methods 3 and 4 accounted for genetic values through producing abilities estimated as random and fixed effects, respectively. Correlations between true …
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ΣΥΜΒΟΛΗ ΣΤΗΝ ΚΑΤΑΡΤΙΣΗ ΤΟΥ ΒΕΛΤΙΣΤΟΥ ΣΧΕΔΙΟΥ ΕΠΙΛΟΓΗΣ ΤΩΝ ΧΟΙΡΩΝ ΣΤΗΝ ΕΛΛΑΔΑ
… CAREASS 130 DR/PIG. THE EVALUATION OF THE TOTAL BREEDING VALUE IS BASED ON RESTRICTED SELECTION INDEXES FOR MEAT QUALITY. THE CRITERIONS OF EFFECTIVENESS ALTERNATIVE SELECTION PLANS IN THIS STUDY ARE: (1) NET ECONOMIC RETURN AND (2) SELECTION RESPONSE. THE OPTIMUM BREEDING SELECTION PLAN OF SWINE …
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The Influence of Artificial Insemination in Three Midwestern States
… review to promote progress in dairy cattle breeding. It is important that sires in artificial insemination be of genetic value superior to the population average. This is imperative when it is realized that through artificial insemination, a sire can be mated to many more cows than he could …
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Genomic selection for high quality beef production
… focus on scenarios within the core nucleus breeding herd while the literature review considers the influence of crossbreeding heavily. Chapter two considered a comparison between pedigree and genomics with relationship matrices built from 10,549 and 4,940 individuals respectively. Animal …
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Models and methods for computer simulations as a resource in plant breeding
… related to various aspects of the integrated breeding approach. Four areas related to use of computer simulation and modeling were explored as outlined in respective chapters: 1) To maximize utility, the simulation tool must be based on effective models of the genome and the process of genetic …
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Implications of Connectedness in the Genetic Evaluation of Livestock
… connectedness exists, comparisons of estimated breeding values (EBV) across units may be biased. The objectives of this study were to identify breeding strategies to increase connectedness among units, to evaluate statistics that may reflect the reduction in bias as connectedness increases in …
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The Effect of Selection on Egg Production in Single Comb White Leghorn Fowl
The practical value of any system of breeding for egg production must be demonstrated first to be appreciated by the average poultryman. High egg yield has been found by several workers to be due to the combined influences of early sexual maturity, non-winter pause, high intensity, non-broodiness …
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Genomics of heifer pregnancy, days open, and days to conception in Red Angus heifers
… for a heifer to conceive by the end of the breeding season; Days Open (DO) - days of breeding season a heifer remained open; and Days to Conception (DC) -- the number of days it took for a heifer to get pregnant, are easy to measure fertility traits with enough information to make beef …
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Exploitation of nonadditive variance through nonrandom mating
… to predict additive and nonadditive genetic values also predict specific combining abilities or combination effects among sire and dams or among sires and maternal grandsires (mgs). Current mating programs, utilizing nonadditive genetic variance only by avoiding mating between close relatives …
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Genomic Selection, Quantitative Trait Loci and Genome-Wide Association Mapping for Spring Bread Wheat (Triticum aestivum L.) Improvement
Molecular breeding involves the use of molecular markers to identify and characterize genes that control quantitative traits. Two of the most commonly used methods to dissect complex traits in plants are linkage analysis and association mapping. These methods are used to identify markers associated …
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Estimation of the genetic parameters of boron and sorbitol concentration in fruit from a pear breeding population, and investigation of the relationship between these traits on the occurrence of flesh spot decay
… ten trees from each of twenty families of a breeding population were used in this study. Approximately ten fruit from each tree were assessed for disorder after four weeks post-harvest storage, and a composite sample from each tree was subsequently analysed for B and sugar (including …