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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"random mating"”.
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Simulated Mass Selection Experiments in Random Mating Autotetraploid Populations
Made available in DSpace on 2014-12-12T00:17:45Z (GMT). No. of bitstreams: 1 7207081.pdf: 4333397 bytes, checksum: f25d81267c8933e3656d09b547a55239 (MD5) Previous issue date: 1971
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A study of a random-mating population of fixed size
This paper is divided into two parts. The first part is devoted to a study of absorption in a genetic population model and the second part to introducing a new method of matrix inversion. The author begins Part I by presenting the haploid population model under consideration, a constant-size …
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ASSOCIATION MAPPING OF GENE REGIONS FOR DROUGHT TOLERANCE AND AGRONOMIC TRAITS IN SORGHUM
… from 19 founder lines through ten generations of random mating, aided by genetic male sterility (GMS) system. This was followed by seven cycles of self-pollination through single seed descent (SSD) to form 1000 MAGIC lines. Two hundred of these were genotyped using a high throughput …
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Exploitation of nonadditive variance through nonrandom mating
… sires and maternal grandsires (mgs). Current mating programs, utilizing nonadditive genetic variance only by avoiding mating between close relatives to prevent inbreeding depression, could be improved upon by use of predicted combination effects due to nonadditive variation beyond inbreeding. …
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Genetic Variation Among Geographically Disparate Yellow Perch Broodstock Populations
… observed indicating significant departures from random mating. Instantaneous measures of inbreeding within these populations ranged from near zero to moderate (median F = 0.16) and overall inbreeding levels averaged FIS = 0.18. Estimates of genetic diversity, Φ ST and genetic distance were …
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Population genetics and transmission dynamics of Plasmodium falciparum in the Kavango East and Zambezi regions of Namibia
… of genetic diversity, low genetic relatedness, random mating and population admixture. Secondly, there are high levels of importation contributing to local transmission. Lastly, population genetic matrices are good surrogate markers for measuring malaria transmission intensity and importation.
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Towards an Information Theoretic Framework for Evolutionary Learning
… for ensembles. We extend Price's Theorem to non-random mating, give it an effective fitness interpretation and decompose it to show the key factors influencing heritability and evolvability. We argue that heritability and evolvability of our information theoretic indicators are high. We …
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The evolution of a sex-linked genetic factor
… significance of mutation, selection, and random mating in the case of sex-linked factors when the generation structure of the population is overlapping. To facilitate the application of mathematical theory, we assume the population size at any time is large and constant denoted by N. …
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Microcomputer simulation of management practices affecting timing of net income in dairy cattle
… at first calving, 12% involuntary culling, and random mating had earliest time to payoff (54.0 mo) and highest net income ($.485/d). Options with 32 mo age at first calving, 24% involuntary culling, and random mating had latest payoff (74.3 mo) and lowest net income (S.246/d). Herds and years …
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Speciation dynamics of an agent-based evolution model in phenotype space
… are organisms, described as branching-coalescing random walkers, which are characterized by their coordinates in a two-dimensional phenotype space. Neutral evolutionary conditions are assumed, such that no organism has a fitness advantage regardless of its phenotype location. Lineages of organisms …
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Evaluation of phenotypic and genetic trends in weaning weight in Angus and Hereford populations in Virginia
… factors (to eliminate the bias due to non-random mating and culling levels) to estimates of sire genetic trends in the regression analyses produced estimates more similar to the estimates obtained from the ML procedure. The average annual genetic trends over the study period from the ML …
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Sequence capture as a tool to understand the genomic basis for adaptation in angiosperm and gymnosperm trees
… and economic importance. Owing to their random mating system and widespread geographical distribution, they harbor abundance genetic variation both within and among populations. Despite their importance, research in forest trees has been underrepresented majorly due to their large and …
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Selection and Assortative Mating
Theoretical aspects of selection and assortative mating were considered separately and jointly. Selection based on the conditional mean of the merit variable given the data maximizes the expected value of the merit variable when the proportion selected is constant. This is optimal even if …
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Distributed computation and inference
… do this when we assume that both inheritance and mating are governed by some simple stochastic processes. This builds on previous work that posed the problem without a "random mating" assumption. Our second inference result concerns the problem of corruption detection on networks. In this problem, …
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Characterisation of the population genetics of farm-bred Haliotis midae using microsatellite DNA markers
… this is most likely due to the occurrence of non-random mating on the lacobsbaai abalone farm. This study has successfully demonstrated that a combination of micro satellite loci with high allelic diversity can potentially be employed as a tool for distinguishing between fast and slow growing …
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Olfactory Communication, Mate Choice, And Reproduction In A Pair-Bonded Primate (aotus Spp.)
… humans. Still, compared to other social and mating systems, little is known about olfactory communication in strictly monogamous non-human primates. Here, a comprehensive approach using chemical, behavioral, and hormonal data is used to explore how putative olfactory signals may mediate the …
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The generalized inbreeding coefficient and the generalized heterozygosity index in a recurrent selection program
… derived for the cases: one-locus, two-allele, random selection; k independent loci and random selection; one-locus, two-allele and effective directional selection; and k linked loci with effective directional selection. These formulas Involved defining a generalized inbreeding coefficient and a …
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Drivers and Fitness Consequences of Dispersal and Structure in Wild Sockeye Salmon Populations (Oncorhynchus nerka)
… and demographic barriers result in non-random mating among many locally adapted subpopulations. The resulting spatial and temporal diversity across heterogeneous landscapes can buffer metapopulations against disruptive events that influence any one subunit. Dispersal and gene flow within …
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A System for Making Selective Matings in Dairy Cattle
<p>The term “selective matings” implies the selection of a sire to breed to each female on an individual, rather than a group or herd basis. Mating systems, other than random mating, may be classed either as the mating of like to like or as the mating of unlikes. This likeness or unlikeness may be …
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Co-operation and conflict in societies of the ponerine ant genus Pachycondyla
… of the population was found. The deviation from random mating presumably was probably due to small, localised nuptial flights. Virgin queens do not mate near their natal nest and disperse before founding colonies. The analysis of cuticular hydrocarbons obtained from live queens revealed …
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