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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Brown, A. H. Clegg, M. T. Lin, J. Z. |
| Spatial Coverage | Turkmenistan |
| Description | Author Affiliation: Lin JZ ( Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, USA.); |
| Abstract | Patterns of nucleotide sequence diversity in the predominantly self-fertilizing species Hordeum vulgare subspecies spontaneum (wild barley) are compared between the putative alcohol dehydrogenase 3 locus (denoted 'adh3') and alcohol dehydrogenase 1 (adh1), two related but unlinked loci. The data consist of a sequence sample of 1,873 bp of 'adh3' drawn from 25 accessions that span the species range. There were 104 polymorphic sites in the sequenced region of 'adh3.' The data reveal a strong geographic pattern of diversity at 'adh3' despite geographic uniformity at adh1. Moreover, levels of nucleotide sequence diversity differ by nearly an order of magnitude between the two loci. Genealogical analysis resolved two distinct clusters of 'adh3' alleles (dimorphic sequence types) that coalesce roughly 3 million years ago. One type consists of accessions from the Middle East, and the other consists of accessions predominantly from the Near East. The two 'adh3' sequence types are characterized by a high level of differentiation between clusters ( approximately 2.2%), which induces an overall excess of intermediate frequency variants in the pooled sample. Finally, there is evidence of intralocus recombination in the 'adh3' data, despite the high level of self-fertilization characteristic of wild barley. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 2 |
| Volume Number | 98 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2001-03-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Alcohol Dehydrogenase Genetics Genes, Plant Hordeum Plant Proteins Afghanistan Evolution, Molecular Frameshift Mutation Gene Duplication Gene Frequency Genetic Variation Enzymology Iraq Israel Jordan Linkage Disequilibrium Models, Genetic Molecular Sequence Data Phylogeny Polymorphism, Genetic Recombination, Genetic Sequence Alignment Sequence Homology, Nucleic Acid Syria Turkey Turkmenistan Comparative Study Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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