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Showing 1 to 20 of 56 for “"genetic parameters"”.
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Estimation of genetic parameters in two maize recurrent selection programs
… of favorable alleles, while maintaining adequate genetic variability for continued selection. Iowa Stiff Stalk Synthetic (BSSS) is a maize population that has undergone continuous recurrent selection for more than 50 years as the base population for two independent selection programs (intra- and …
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Selection for feed conversion : direct and correlated responses and genetic parameters
Digitized by Kansas Correctional Industries
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Genetic Parameters and Genetic Trends of Female Fertility in Icelandic Dairy Cattle
… by calving interval, has been included in the genetic evaluation of Icelandic dairy cattle since 1993. In spite of this an unfavourable genetic trend is seen and, recent implementation of test-day models for the genetic evaluation of milk production has changed the premise of using calving …
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Genetic Parameters for Udder and Teat. Type Traits in Icelandic Cattle Breed
… 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 review the current breeding value estimations of udder and teats for Icelandic …
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Estimates of Genetic Parameters Necessary for Constructing Selection Indexes for Beef Cattle
Made available in DSpace on 2014-12-05T17:47:29Z (GMT). No. of bitstreams: 1 0016391.pdf: 2195037 bytes, checksum: aaf068e944214453e3c6eae0b1ed2caa (MD5) Previous issue date: 1956
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Genetic parameters and genomic analysis of semen quality and fertility traits in pigs
… pig industry by assisting and disseminating the genetic progress. Currently, young boars are selected for AI based on their breeding values for production traits and selecting boars for semen traits, such as volume, concentration, motility and morphology, and for low variation in semen quality …
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Avoidance Conditioning in the Absence of External Stimulation: Some Experimental and Genetic Parameters
Made available in DSpace on 2014-12-03T23:50:55Z (GMT). No. of bitstreams: 1 0020888.pdf: 4173216 bytes, checksum: f4e2889c44fbc30b45fdd8e7ab7652d6 (MD5) Previous issue date: 1957
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Estimates of Genetic Parameters From a Liguleless Corn Synthetic Grown at Two Plant Populations
Made available in DSpace on 2014-12-14T14:37:20Z (GMT). No. of bitstreams: 1 7714932.pdf: 2220099 bytes, checksum: 65999241659c2f8cb6a80c2735f3d02b (MD5) Previous issue date: 1977
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ESTIMATION OF QUANTITATIVE GENETIC PARAMETERS OF THE EASTERN OYSTER (CRASSOSTREA VIRGINICA) IN THE GULF OF MEXICO
… oysters bred for habitat-specific optimal genetic characteristics. In this work, genetic parameters for performance in habitats with different salinity were estimated. In September 2020, 102 males and 102 females sourced from 17 natural reefs across the northern Gulf were bred according to …
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Genetic Parameters of Foal Inspection Scores in the International Sporthorse Registry and Oldenburg Registry North America
… North America were used for statistical and genetic analysis. Scored traits include type and conformation (TC), athletic ability of movement (AM), overall development as related to age (OD), and total score (TS) calculated as a weighted average of TC, AM, and OD. Premium status (PS) was …
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GENETIC PARAMETERS FOR HEAT AND SALINITY STRESS TOLERANCE IN NORTHERN GULF OF MEXICO EASTERN OYSTER, CRASSOSTREA VIRGINICA
… (h<sup>2</sup>) of tolerance traits and genetic correlations were estimated using linear mixed models. Heritability of heat stress tolerance in seed was low and did not differ significantly from zero (0.216±0.199). Heat stress tolerance in adults and condition index in juveniles were both …
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Estimation of genetic parameters for development of alternative selection criteria for increased litter size in Rambouillet sheep
… needed to estimate heritabilities of and genetic correlations among litter size, ovulation rate, scrotal circumference and body weight in Rambouillet sheep were estimated using REML (Restricted Maximum Likelihood) via an EM (Expectation-Maximization) type algorithm. Data were obtained from …
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Response to S1 recurrent selection and estimation of genetic parameters in effective population sizes of the BS11 maize population
… into that due to additive and dominance genetic components, and (3) to examine changes in the correlated traits. Four effective population sizes 5, 10, 20, and 30 were developed by S1-progeny selection in the BS11 maize population using a 20% selection intensity designated as 5-S1, 10-S1 …
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Line characterization and evaluation of genetic parameters of serum cholesterol levels, activity, feed intake, growth and body moisture in selected and unselected lines of laboratory mice
… control (C). Heritability (h²), phenotypic and genetic correlations of SCL, activity, growth, and body moisture content were estimated for 466 sire-son pairs of mice from an unselected line. Blood samples were obtained by sinus orbital bleeding at 35 and 70 days of age in the line …
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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
… This study was carried out to estimate genetic parameters, in particular narrow-sense heritabilities and additive genetic correlations, of boron (B) and sorbitol contents and FSD in pear fruit. Approximately ten trees from each of twenty families of a breeding population were used in …
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Genetic Evaluation and Parameter Estimation Using Marker and Trait Information
Genetic evaluation by BLUP using marker and trait information requires knowledge of genetic parameters, such as the recombination rate ( r) between a marker locus and a marked QTL. Maximum likelihood methods are widely used to estimate genetic parameters. This thesis presents a new approximation to …
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Inter-Population Maize Improvement in the F(2) and in the Bc(1) Following Elite Line by Broadbase Population Crosses (Linkage, Intra-Population Parameters)
Estimates of genetic parameters from 3 x 3 Design II analyses, pooled over 32 sets and evaluated at two locations, of crosses among random F(,2)S(,1) lines of B73 x B Comp. with random F(,2)S(,1) lines of Mo17H x A Comp. and among random BC(,1)S(,1) lines (backcrossed to the inbreds) of the two …
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Integrated genetic evaluation of breeding field test traits, competition traits and test status in Icelandic horses
… to bias in estimated breeding values and retards genetic improvement. The main aim of this thesis was to study integrated genetic evaluation of competition traits and breeding field test traits for Icelandic horses where the effects of preselection in the data were accounted for. Genetic …
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