Additional Loci
Mostrando 25-36 de 445 artigos, teses e dissertações.
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25. Chromosome evolution in tiger beetles: Karyotypes and localization of 18S rDNA loci in Neotropical Megacephalini (Coleoptera, Cicindelidae)
Four Neotropical tiger beetle species, three from the genus Megacephala and one from the genus Oxycheila, currently assigned to the tribe Megacephalini were examined cytogenetically. All three Megacephala species showed simple sex chromosome systems of the X0/XX type but different numbers of autosomal pairs (15 in M. cruciata, 14 in M. sobrina and 12 in M. r
Genetics and Molecular Biology. Publicado em: 2005-12
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26. Chromosomal organization and phylogenetic relationships in Hypochaeris species (Asteraceae) from Brazil
The association of cytogenetic and molecular techniques has contributed to the analysis of chromosome organization and phylogeny in plants. The fluorochrome GC-specific CMA3, fluorescent in situ hybridization (FISH) and RAPD (Random Amplified Polymorphic DNA) markers were used to investigate chromosome structure and genetic relationships in Hypochaeris (Aste
Genetics and Molecular Biology. Publicado em: 2005-03
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27. Mapeamento de QTLS no cromossomo 1 de Gallus gallus que influenciam características de desempenho e carcaça. / Mapping QTLS on chicken chromosome 1 affecting performance and carcass traits.
An F2 chicken population was developed by crossing a broiler sire line and a layer line, with the objective of mapping Quantitative Trait Loci (QTL) for performance and carcass traits. A total of 2,063 F2 chicks in 21 full-sib families from 17 hatches were reared as broilers and slaughtered at 6 weeks of age. Nineteen performance and carcass quality traits w
Publicado em: 2004
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28. EstratÃgias de prediÃÃo de cruzamentos nÃo realizados em anÃlise dialÃlica, utilizando informaÃÃes de marcadores moleculares. / Alternatives for predicting effects of missing crosses in diallels, with information from molecular markers.
Diallel crosses are largely used by breeders to assist choosing parents and/or populations. One constraint of such designs is the effort required to obtain crosses, the amount of which grows exponentially as the number of parents increases. This work aimed at evaluation some approaches to predict effects of missing crosses in diallel analysis, comprising 120
Publicado em: 2004
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29. Human mixed infections of Leishmania spp. and Leishmania-Trypanosoma cruzi in a sub Andean Bolivian area: identification by polymerase chain reaction/hybridization and isoenzyme
Parasites belonging to Leishmania braziliensis, Leishmania donovani, Leishmania mexicana complexes and Trypanosoma cruzi (clones 20 and 39) were searched in blood, lesions and strains collected from 28 patients with active cutaneous leishmaniasis and one patient with visceral leishmaniasis. PCR-hybridization with specific probes of Leishmania complexes (L. b
Memórias do Instituto Oswaldo Cruz. Publicado em: 2003-03
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30. Biometrical aspects of QTL detection in cultivated species. / Aspectos biométricos da detecção de QTL S ("Quantitative Trait Loci") em espécies cultivadas.
In general terms, QTL mapping di®ers from other research ac-tivities in genetics. Being basically a multiple test procedure, problems arise which are related to the joint level of signi¯cance of the analysis, and consequently, to its power. Using computational simulation of data, the power of simple marker analysis, carried out through multiple linear regr
Publicado em: 2001
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31. Mexican Trypanosoma cruzi stocks: analysis of minicircle kDNA homologies by cross-hybridization
Homologies of minicircle kDNA of 27 Mexican stocks were studied by cross-hybridization with four kDNA probes derived from three reference stocks belonging to groups Trypanosoma cruzi I (SO34 cl4 and Silvio) and T. cruzi II (MN) and one Mexican stock. High homologies were only observed with Silvio (six stocks) and Mexican probes (11 stocks). After 30 min expo
Memórias do Instituto Oswaldo Cruz. Publicado em: 2000-08
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32. A Genomewide Scan for Type 1–Diabetes Susceptibility in Scandinavian Families: Identification of New Loci with Evidence of Interactions
Type 1 diabetes mellitus (TIDM) has a multifactorial etiology, with major genetic-susceptibility determinants located in the HLA and insulin-gene (INS) regions. Linkage data implicating other disease-susceptibility loci are conflicting. This is likely due to (1) the limited power for detection of contributions of additional susceptibility loci, given the lim
The American Society of Human Genetics.
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33. Discovery of myosin genes by physical mapping in Dictyostelium.
The diversity of the myosin family in a single organism, Dictyostelium discoideum, has been investigated by a strategy devised to rapidly identify and clone additional members of a gene family. An ordered array of yeast artificial chromosome clones that encompasses the Dictyostelium genome was probed at low stringency with conserved regions of the myosin mot
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34. Recessive Alleles Found at R and C Loci in Maize Stocks Showing Aberrant Ratio at the A Locus
Corn stocks showing virus-induced aberrant ratio (AR) at the "A" locus were found to have recessive alleles at the R and/or C loci. Since by the known pedigree these loci should be homozygous dominant, the results suggest an inactivation of maize genes by a mechanism as yet unknown. The presence of recessive alleles at these additional loci can explain the s
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35. Isolation and Regulation of Sinorhizobium meliloti 1021 Loci Induced by Oxygen Limitation
Eleven Sinorhizobium meliloti 1021 loci whose expression was induced under low oxygen concentrations were identified in a collection of 5,000 strains carrying Tn5-1063 (luxAB) transcriptional reporter gene fusions. The 11 Tn5-1063-tagged loci were cloned and characterized. The dependence of the expression of the tagged loci on the FixL/FixJ oxygen-sensing tw
American Society for Microbiology.
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36. Simultaneous Cre catalyzed recombination of two alleles to restore neomycin sensitivity and facilitate homozygous mutations.
Cells homozygous for neo-expressing mutations can be derived by culturing heterozygotes with elevated G418. We demonstrate that this strategy is significantly less efficient if hyg is substituted for neo. Therefore, to introduce additional mutations Cre recombinase was used to remove floxed neo from both alleles of homozygotes at two different loci. The rate