A Physical Map of the Short Arm of Wheat Chromosome 1A

作者：Breen James; Wicker Thomas; Shatalina Margarita; Frenkel Zeev; Bertin Isabelle; Philippe Romain; Spielmeyer Wolfgang; Simkova Hana; Safar Jan; Cattonaro Federica; Scalabrin Simone; Magni Federica; Vautrin Sonia; Berges Helene; Paux Etienne; Fahima Tzion; Dolezel Jaroslav; Korol Abraham; Feuillet Catherine; Keller Beat^*

来源：PLos One, 2013, 8(11): e80272.

DOI：10.1371/journal.pone.0080272

Bread wheat (Triticum aestivum) has a large and highly repetitive genome which poses major technical challenges for its study. To aid map-based cloning and future genome sequencing projects, we constructed a BAC-based physical map of the short arm of wheat chromosome 1A (1AS). From the assembly of 25,918 high information content (HICF) fingerprints from a 1AS-specific BAC library, 715 physical contigs were produced that cover almost 99% of the estimated size of the chromosome arm. The 3,414 BAC clones constituting the minimum tiling path were end-sequenced. Using a gene microarray containing similar to 40 K NCBI UniGene EST clusters, PCR marker screening and BAC end sequences, we arranged 160 physical contigs (97 Mb or 35.3% of the chromosome arm) in a virtual order based on synteny with Brachypodium, rice and sorghum. BAC end sequences and information from microarray hybridisation was used to anchor 3.8 Mbp of Illumina sequences from flow-sorted chromosome 1AS to BAC contigs. Comparison of genetic and synteny-based physical maps indicated that similar to 50% of all genetic recombination is confined to 14% of the physical length of the chromosome arm in the distal region. The 1AS physical map provides a framework for future genetic mapping projects as well as the basis for complete sequencing of chromosome arm 1AS.

• 出版日期2013-11-21
• 单位CSIRO