The extent of linkage equilibrium was estimated among four recently characterized human fibrinogen restriction fragment length polymorphisms (RFLPs) using a randomly selected group of 110 individuals from California. Two coding region RFLPs, RsaI and MnlI (FGA codon 312 and FGB codon 448, respectively), and two RFLPs located in the 5' flanking region of the FGB gene, AluI (HindIII) and HaeIII, were analyzed. Maximum likelihood estimates based on genotypic data indicated that the RsaI polymorphism in the FGA gene was at apparent linkage equilibrium with the MnlI, AluI, and HaeIII sites in the FGB gene, but strong linkage disequilibrium was noted for the MnlI-AluI, MnlI-HaeIII, and AluI-HaeIII RFLP pairs within the latter gene. The discrepancy in disequilibrium relationships among these closely linked RFLPs may indicate a region of increased recombination between the FGA and FGB RFLP loci. The FGA RsaI polymorphism, when used in conjunction with any of the FGB sites examined, will provide more detailed linkage or association data than analyses that would utilize only FGB sites. Effective use of polymorphisms within the fibrinogen locus will aid analysis of the relationships between fibrinogen genotype, plasma fibrinogen levels, and risk of cardiovascular disease.
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http://dx.doi.org/10.1007/BF00202863 | DOI Listing |
Evol Appl
January 2025
Save Our Seas Foundation Shark Research Center, Halmos College of Arts & Sciences Nova Southeastern University Dania Florida USA.
Large-bodied pelagic sharks are key regulators of oceanic ecosystem stability, but highly impacted by severe overfishing. One such species, the shortfin mako shark (), a globally widespread, highly migratory predator, has undergone dramatic population reductions and is now Endangered (IUCN Red List), with Atlantic Ocean mako sharks in particular assessed by fishery managers as overfished and in need of urgent, improved management attention. Genomic-scale population assessments for this apex predator species have not been previously available to inform management planning; thus, we investigated the population genetics of mako sharks across the Atlantic using a bi-organelle genomics approach.
View Article and Find Full Text PDFEcol Evol
January 2025
State Key Laboratory of Breeding Biotechnology and Sustainable Aquaculture, Institute of Hydrobiology Chinese Academy of Sciences Wuhan China.
The black bream () is an economically important species widely distributed in China, with its geographic populations potentially having undergone differentiations and local adaptations. In this study, we presented a chromosome-level genome assembly of this species and investigated genetic differentiations of its populations that are allopatric (the northern one) and sympatric (the Poyang Lake) to its kin species, the blunt-snout bream (), using whole genome resequencing analysis. The results showed that the genome size of black bream was 1.
View Article and Find Full Text PDFAnim Biosci
January 2025
Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou Province/Guiyang City/Huaxi District, China.
Objective: This study aimed to identify polymorphisms in the gene encoding the 3-hydroxy-3-methylglutaryl-CoA synthase 1, HMGCS1, and analyze their association with slaughter characteristics, meat quality, and organ coefficients in Guizhou white goats.
Methods: A total of 153 twelve-month-old Guizhou white goats (78 male and 75 female) were included in the study. Slaughter characteristics, meat quality, and organ coefficients were assessed.
Clin Transl Gastroenterol
January 2025
Key Laboratory of Hepatosplenic Surgery, Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang province, China.
Background: Cholelithiasis is influenced by various factors, including genetic elements identified in genome-wide association studies (GWAS), but their biological functions are not fully understood.
Methods: Analyzing data from the Finngen database with 37,041 cholelithiasis cases and 330,903 controls, this study combined SNP data from GTEx v8 and linkage disequilibrium data from the 1000 Genomes Project. Using the TWAS FUSION protocol and SMR analysis, it investigated the relationship between gene expression and cholelithiasis, employing colocalization tests and conditional analyses to explore causality.
Brain Behav Immun Health
February 2025
Department of Neurosurgery, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan, 450003, China.
Background: Trigeminal neuralgia (TN) is a severe facial pain disorder with complex etiology. Inflammation has been suggested as a contributing factor to TN pathogenesis. This study investigates the causal relationship between inflammatory biomarkers, including 41 circulating inflammatory cytokines, C-reactive protein (CRP), and procalcitonin (PCT), and TN using Mendelian randomization (MR) analysis.
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