Science. 2008 Oct 3;322(5898):101-4.

A physical map of the 1-gigabase bread wheat chromosome 3B.

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Institut National de la Recherche Agronomique, Université Blaise Pascal (INRA-UBP), UMR 1095, Genetics Diversity and Ecophysiology of Cereals, Clermont-Ferrand, France.

Abstract

As the staple food for 35% of the world's population, wheat is one of the most important crop species. To date, sequence-based tools to accelerate wheat improvement are lacking. As part of the international effort to sequence the 17-billion-base-pair hexaploid bread wheat genome (2n = 6x = 42 chromosomes), we constructed a bacterial artificial chromosome (BAC)-based integrated physical map of the largest chromosome, 3B, that alone is 995 megabases. A chromosome-specific BAC library was used to assemble 82% of the chromosome into 1036 contigs that were anchored with 1443 molecular markers, providing a major resource for genetic and genomic studies. This physical map establishes a template for the remaining wheat chromosomes and demonstrates the feasibility of constructing physical maps in large, complex, polyploid genomes with a chromosome-based approach.

PMID:: 18832645; [PubMed - indexed for MEDLINE]

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