Ethnicity and Human Genetic Linkage Maps

dc.contributor.authorJorgenson, Eric
dc.contributor.authorTang, Hua
dc.contributor.authorGadde, Maya
dc.contributor.authorProvince, Mike
dc.contributor.authorLeppert, Mark
dc.contributor.authorKardia, Sharon
dc.contributor.authorSchork, Nicholas
dc.contributor.authorCooper, Richard
dc.contributor.authorRao, DC
dc.contributor.authorBoerwinkle, Eric
dc.contributor.authorRisch, Neil
dc.date.accessioned2019-08-14T14:59:21Z
dc.date.available2019-08-14T14:59:21Z
dc.date.issued2005
dc.description.abstractHuman genetic linkage maps are based on rates of recombination across the genome. These rates in humans vary by the sex of the parent from whom alleles are inherited, by chromosomal position, and by genomic features, such as GC content and repeat density.We have examined—for the first time, to our knowledge—racial/ethnic differences in genetic maps of humans. We constructed genetic maps based on 353 microsatellite markers in four racial/ethnic groups: whites, African Americans, Mexican Americans, and East Asians (Chinese and Japanese). These maps were generated using 9,291 subjects from 2,900 nuclear families who participated in the National Heart, Lung, and Blood Institute–funded Family Blood Pressure Program, the largest sample used for map construction to date. Although the maps for the different groups are generally similar, we did find regional and genomewide differences across ethnic groups, including a longer genome-wide map for African Americans than for other populations. Some of this variation was explained by genotyping artifacts—namely, null alleles (i.e., alleles with null phenotypes) at a number of loci—and by ethnic differences in null-allele frequencies. In particular, null alleles appear to be the likely explanation for the excess map length in African Americans. We also found that nonrandom missing data biases map results. However, we found regions on chromosome 8p and telomeric segments with significant ethnic differences and a suggestive interval on chromosome 12q that were not due to genotype artifacts. The difference on chromosome 8p is likely due to a polymorphic inversion in the region. The results of our investigation have implications for inferences of possible genetic influences on human recombination as well as for future linkage studies, especially those involving populations of nonwhite ethnicity.
dc.description.urihttp://www.sciencedirect.com/science/article/pii/S0002929707625798
dc.identifierhttps://doi.org/10.13016/qtnq-msxo
dc.identifier.citationJorgenson, Eric and Tang, Hua and Gadde, Maya and Province, Mike and Leppert, Mark and Kardia, Sharon and Schork, Nicholas and Cooper, Richard and Rao, DC and Boerwinkle, Eric and Risch, Neil (2005) Ethnicity and Human Genetic Linkage Maps. Am J Hum Genet, 76. pp. 276-290.
dc.identifier.otherEprint ID 457
dc.identifier.urihttp://hdl.handle.net/1903/22553
dc.subjectResearch
dc.subjectstudies
dc.subjectGenetics and Race
dc.subjecthuman genetic linkage map
dc.subjectethnicity
dc.titleEthnicity and Human Genetic Linkage Maps
dc.typeArticle

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