Geographic distribution and recombination of genomic fragments on the short arm of chromosome 2 of Arabidopsis thaliana.

Geographic distribution and recombination of genomic fragments on the short arm of chromosome 2 of Arabidopsis thaliana. Research Abstract Details 

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Geographic distribution and recombination of genomic fragments on the short arm of chromosome 2 of Arabidopsis thaliana. Abstract Text:

H Schmuths,M H Hoffmann,K Bachmann,

Range expansion from Pleistocene refugia and anthropogenic influences contribute to the present distribution pattern of Arabidopsis thaliana. We scored a genome-wide set of CAPSs and found two markers with an east-west geographic distribution across the Eurasian range of the species. Regions around the two SNPs were sequenced in 98 accessions, including newly collected plants from Middle Asia and Western Siberia. These regions correspond to a gene ( approximately 1500 bp) and a non-coding region ( approximately 500 bp) 300 kbp apart on chromosome 2. Nucleotide diversities, pi, of the two sequenced fragments were 0.0032 and 0.0130. The haplotypes of both sequences belonged to one of two groups: a rather uniform "Asian" and a more variable "European" haplotype group, on the basis of non-disjunct clusters of SNPs. Recombination between "Asian" and "European" haplotypes occurs where they meet. Especially in the "European" haplotype, many rare SNP variants representing independent mutations are scattered among the shared haplotype-specific SNPs. This agrees with previous suggestions of two large haplotype groups in A. thaliana and the post-glacial colonization of central Europe from the east and the west. A clear correlation between climatic factors and the haplotype distribution may reflect the dispersal history rather than local climate adaptation. The pattern of SNP variation within the contiguous sequences explains why only a minority of SNPs selected across the genome show evidence of this geographic pattern.

Geographic distribution and recombination of genomic fragments on the short arm of chromosome 2 of Arabidopsis thaliana. Publishing Authors By Initials

H Schmuths,MH Hoffmann,K Bachmann,

For similar geographic locations: americas: north america: united states research abstracts see: geographic locations: americas: north america: united states research

PUBMED ID PMID:

MEDLINE DATE: 2004 Mar-Apr

Geographic distribution and recombination of genomic fragments on the short arm of chromosome 2 of Arabidopsis thaliana. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Plant biology (Stuttgart, Germany)

VOLUME: 6

Page Numbers: 128-39

Journal Abbreviation: Plant Biol (Stuttg)

ISSN: 1435-8603

DAY: 7

MONTH: 01

YEAR: 2008

Geographic distribution and recombination of genomic fragments on the short arm of chromosome 2 of Arabidopsis thaliana. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 101148926

Geographic distribution and recombination of genomic fragments on the short arm of chromosome 2 of Arabidopsis thaliana. Keywords Mesh Terms:

KEYWORDS: United States

MESH TERMS: genetics

Chemical & Substance for Abstract: Geographic distribution and recombination of genomic fragments on the short arm of chromosome 2 of Arabidopsis thaliana. Information

Substance Name: DNA, Plant

Registry Number: 0

Grant and Affiliation Information for Geographic distribution and recombination of genomic fragments on the short arm of chromosome 2 of Arabidopsis thaliana.

AFFILIATION: Department of Taxonomy, Institute of Plant Genetics and Crop Plant Research, Gatersleben, Germany. schmuths@ipk-gatersleben.de

Country: Germany

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MEDLINETA: Plant Biol (Stuttg)

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