Global ETD Search
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 16 of 16 for “"Genetic load"”.
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LEVERAGING EVOLUTION TO UNDERSTAND GENETIC LOAD IN CASSAVA (MANIHOT ESCULENTA)
… and limited sexual reproductive ability. Genetic load due to the accumulation of underlying deleterious mutations has been hypothesized as an underlying cause for these difficulties. In recent years genomic selection has been adopted as a strategy to accelerate genetic gain and quickly …
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Inbreeding depression and segregation distortion in Chinook salmon: Conservation implications of genetic load
… fitness losses. The potential to purge genetic load from a population was shown to take place and the major genetic mechanism driving ID was due to expression of deleterious recessive alleles.
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The biosystematics of pteridophytes: aspects of morphology and reproductive biology of some epiphytic ferns
… produce antheridia, thus promoting outcrossing;Genetic load indicates that L. thunbergianus, M. heterophylla, P. pellucidum, E. alatum, E. callifolium, E. crassifolium and one source of C. angustifolium produce sporophytes mainly through intergametophytic mating whereas P. aureum, P. …
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Using Museomics to Investigate Extinction and Decline in British Butterflies
… conserve species we have to understand their genetic diversity. Conservation of insect species is often difficult as not only do we not have accurate conservation assessment data for many species, studies on metrics of genomic erosion in insects are scarce. In the Natural History Museum in …
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Use of a translocation and a recessive deleterious gene to retard population growth in Blattella germanica (L.)
… Blattella germanica to study the effect of this genetic load on population growth. Five experimental populations and one control were followed by monthly census for eight months. Individual progeny groups were held in separate containers. Various aspects of reproductive behavior of different …
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Resource competition and soft selection in Sabatia angularis
… fitness is a function of the density and genetic composition of competitors, selection is considered ‘soft’. The extent to which soft selection occurs in natural populations remains an open question and a critical one, given it can explain phenomena such as the maintenance of genetic load …
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Boundaries of the cognitive phenotype of autism: social cognition and central coherence in young people with autistic traits and their first degree relatives
… controlled. These results in a sample with a low genetic load suggest ambiguous figures will be important in delineating the broader cognitive phenotype of autism.
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Potato genomics three ways: quantification of endoreduplication in tubers, a romp through the transposon terrain, and elucidation of flower color regulation
… tuberosum) have been hampered by its complicated genetics and high genetic load. This dissertation applies genome reduction techniques to investigate a broad swath of genomic and physiological phenomena. It begins with the presentation and evaluation of a protocol to characterize endoreduplication …
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Produção de fitomassa fresca e seca e de grãos de sorgo (Sorghum bicolor L. Moench) sob adubação orgânica e mineral
… for sorghum cultivars were provided by the genetic load, the maximum yield of fresh biomass and dry biomass sorghum cultivar was provided by SF 120. The increasing amounts of nitrogen and manure applied to the soil does not yield increases in the production of fresh biomass and dry biomass …
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Identification of Deleterious and Disease Alleles in a General Population and Preterm Labor Patients
… allele frequencies due to the genetic linkage with beneficial alleles by the hitchhiking effect.</p> <p>Second, I developed an integrative strategy to predict disease-causing non-coding variants in FSH receptor, a gene known to be associated with preterm birth, as a proof of …
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Polymorphic social organisation in a eusocial insect : the ultimate and proximate causes
… investigating skew, by providing detailed sociogenetic data to show a polymorphism in colony social organisation in a species of ant, Leptothorax acervorum. In multiple queen colonies queens reproduce relatively evenly in most populations (polygyny), but I show that skew is particularly high in …
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Aberrant segregation in human populations
… been due to chance. The second study was on the genetic load of the population in Odate, Japan. Prenatal death was examined with respect to several factors and found to fall into at least three classes: early prenatal death (EPRE), up to four months of gestation; late prenatal death (LPRE), up to …
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Restoration genetics of Murray Mallee and neotropical forests.
… to small population paradigm effects (e.g. genetic drift) that generally dominate conservation genetics and restoration as many other taxa. The reasons for this are that trees tend to (1) undergo regular far-reaching gene flow, even in fragmented landscapes, (2) have many overlapping …
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Genetic and environmental influences on cord blood atopic markers and on atopic sensitisation in infancy
… regime, early identification of the infants genetically "at risk" for atopic disease is essential, since sensitisation begins at birth, or even during intra-uterine life. European and Scandinavian studies have shown that a raised concentration of cord blood serum immunoglobulin E (CBsIgE) is …
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Protoplast Fusion for the Production of Intermonoploid Somatic Hybrids in Cultivated Potato
… represent plant material that is free from the "genetic load" of lethal and severely deleterious alleles normally present in the highly heterozygous cultivated potato species. Field evaluations enabled the identification of agronomically superior monoploid potato genotypes from a population of …
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Evolutionary dynamics of mating systems in populations of North American Arabidopsis lyrata
… markers to determine recent population genetic patterns. The results showed a loss of SI in populations from all three detected cpDNA haplotypes. Microsatellite data showed that predominantly inbreeding populations sharing one of these haplotypes showed high levels of homozygosity and …