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Showing 1 to 20 of 116 for “"introgression"”.
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Cytology and Morphology of Saccharum--Sorghum Introgression
Made available in DSpace on 2014-12-14T14:37:23Z (GMT). No. of bitstreams: 1 7804011.pdf: 3162989 bytes, checksum: d31d15a0d4a18bee5c0db124108854ec (MD5) Previous issue date: 1977
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Introgression of genes from rape to wild turnip
Introgression of genes from crops into ruderal populations is a multi-step process requiring sympatry, synchronous flowering, chromosomal compatibility, successful pollination and development of the zygote, germination, establishment and reproduction of hybrid progeny. The goal of this thesis was …
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Morphological Detection of Genetic Introgression in Red Junglefowl (Gallus Gallus)
… status. However, evidence suggests that genetic introgression from free-ranging, escaped, and feral domestic chickens might be so widespread and pervasive that Red Junglefowl may be endangered or even extinct in the wild. Because genetic markers have yet to be identified, detection of …
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Introgression, Population Structure, and Systematics of the Sphagnum capillifolium complex
… were not random, suggesting the presence of introgression, in addition to incomplete lineage sorting (ILS). Analyses of introgression signals using ABBA/BABA tests and branch length distributions (QuIBL) showed that there were several possible introgression events within the S. capillifolium …
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Effects of selective genetic introgression from wild soybean to soybean
Commercial soybean [Glycine max (L.) Merr.] breeding in the U.S. currently relies on a narrow genetic base in which more than half of the genetic contribution, calculated by pedigree analysis, comes from only 5 ancestral lines. For decades, but more intensely in recent years, efforts have been made …
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Genetic introgression from Glycine tomentella to soybean to increase seed yield
The student, Abraham Akpertey, accepted the attached license on 2015-04-21 at 13:53.
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Molekulargenetische und zytogenetische Untersuchungen zur paternalen Introgression beim gynogenetischen Amazonenkärpfling, Poecilia formosa
… Nachkommen weitergegeben werden kann (paternale Introgression). Sowohl in natürlichen Lebensräumen als auch unter Laborbedingungen konnten nur zwei Formen paternaler Introgression identifiziert werden: Kommt es aufgrund von Karyogamie zu einer tatsächlichen Befruchtung der diploiden Oozyte durch …
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Genetic introgression and female mate choice within the Calendulauda albescens/C. barlowi hybrid zone
… of these individuals to determine if possible introgression is occuring from C. albescens to C. barlowi. Mitochondrial DNA from 13 lark individuals found in the C. albescens/C. barlowi hybrid zone was analysed. A 358 base pair cytochrome-b sequence was obtained. The neighbour-joining …
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Hybridization And Introgression In Marine Invertebrates: Population Genomics Of Phymactis Papillosa And Asterias Sea Stars
<p>Hybridization and introgression are evolutionary significant processes in marine invertebrates (Sanford & Kelly,2011) yet genome-wide investigations of gene flow in these taxa remain limited relative to vertebrate systems (Marchi et al., 2021). This thesis presents genomic analyses of …
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Use of Comparative Genomics for Non-coding Rna Prediction and Investigation of Dna Introgression in Yeast
… this sequence obtained from var. grubii. The introgression event likely occurred via an incomplete inter-varietal sexual cycle creating a hybrid intermediate where mobile elements common to both lineages mediated the exchange. The subsequent duplication in laboratory strains of a fragment of …
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Introgression of desirable traits from temperate maize Zea mays L.)into tropical maize for low phosphorus soils
… sources of desirable yield enhancing alleles for introgression to improve tropical maize on phosphorus deficient soils. Inbred-line J185 was the best general combiner and source of desirable alleles followed by Mo17. Hybrids L151xJ185, L151xMo17, L152xJ185, L1212xMo17, 152xMo17, L1212xJ185 and …
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Introgression of desirable traits from temperate maize Zea mays L.)into tropical maize for low phosphorus soils
… sources of desirable yield enhancing alleles for introgression to improve tropical maize on phosphorus deficient soils. Inbred-line J185 was the best general combiner and source of desirable alleles followed by Mo17. Hybrids L151xJ185, L151xMo17, L152xJ185, L1212xMo17, 152xMo17, L1212xJ185 and …
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Nuclear and cytoplasmic genetic variation in Picea: DNA markers for evaluating past migration, introgression and evolutionary history
… and P. glauca . Inter-species hybridization and introgression are discussed as possible reasons behind such incongruencies.</p>
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Patterns of Archaic Hominin DNA in Modern Human Genomes
… genomes, I identify signatures of introgression from an unknown archaic hominin with an apparent divergence time with modern humans that is similar to the divergence time of Neanderthals. In a sample of 379 European and 279 East Asian genomes, I identify on average 1/4 of each …
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The genetic basis of reproductive isolation in house mice: Studies of a European hybrid zone
… This idea motivates a detailed study of introgression for X-linked loci across a European hybrid zone between two species of house mice, Mus domesticus and M. musculus (Appendix A). Allele frequency patterns at 13 molecular markers with known chromosomal positions identify one region with …
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Analysis of Hybridization Between Native and Invasive Pupfishes (Cyprinodon)
… through rapid hybridization and genetic introgression. <em>Cyprinodon rubrofluviatilis </em>is native to the Brazos, Wichita and Red Rivers but<em> </em>fish collected between 2006-2012 from the Brazos River expressed intermediate morphological traits suggesting hybridization had …
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Evolutionary history and hybridization in Passerina buntings
… maintaining biological diversity. By comparing introgression patterns of different loci, researchers can begin to identify genetic regions that contribute to reproductive isolation between hybridizing taxa. In taxa, like birds, with heterogametic females, Haldane’s rule predicts that mtDNA and …
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Introgression of the Genes for Sesquiterpene Carboxylic Acid Synthesis From a Wild Tomato, Lycopersicon Hirsutum, Into the Cultivated Tomato for Increased Host -Plant Resistance to Insect Pests
F2 and backcross progeny were assayed for the presence of polymorphic molecular markers using the Amplified Fragment Length Polymorphism (AFLP) protocol. Progeny of each generation were separated into high and low classes for SCA levels and the DNA combined of individual plants within the …
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Interspecific Hybridization Among Black Basses (Micropterus spp.) in the Chattahoochee River, Columbus Georgia
… more abundant parent, resulting in asymmetrical introgression. The objective of this study was to determine the extent and apparent direction of hybridization between shoal bass {Micropterus cataractae), a rare endemic species to the Apalachicola drainage, and spotted bass (M. punctulatus), an …
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