GrainGenes Home

 
Query (optional)   in Class 

GrainGenes Reference Report: TAG-117-181

[ Printable Version ]  [ Submit comment/correction ]

Reference
TAG-117-181
Title
A high-density intervarietal map of the wheat genome enriched with markers derived from expressed sequence tags.
Journal
Theoretical and Applied Genetics
Year
2008
Volume
117
Pages
181-189
Author
[ Hide all but 1 of 15 ]
Xue S
Zhang Z
Lin F
Kong Z
Cao Y
Li C
Yi H
Mei M
Zhu H
Wu J
Xu H
Zhao D
Tian D
Zhang C
Ma Z
Abstract
Bread wheat (Triticum aestivum L.) is a hexaploid species with a large and complex genome. A reference genetic marker map, namely the International Triticeae Mapping Initiative (ITMI) map, has been constructed with the recombinant inbred line population derived from a cross involving a synthetic line. But it is not sufficient for a full understanding of the wheat genome under artificial selection without comparing it with intervarietal maps. Using an intervarietal mapping population derived by crossing Nanda2419 and Wangshuibai, we constructed a high-density genetic map of wheat. The total map length was 4,223.1 cM, comprising 887 loci, 345 of which were detected by markers derived from expressed sequence tags (ESTs). Two-thirds of the high marker density blocks were present in interstitial and telomeric regions. The map covered, mostly with the EST-derived markers, approximately 158 cM of telomeric regions absent in the ITMI map. The regions of low marker density were largely conserved among cultivars and between homoeologous subgenomes. The loci showing skewed segregation displayed a clustered distribution along chromosomes and some of the segregation distortion regions (SDR) are conserved in different mapping populations. This map enriched with EST-derived markers is important for structure and function analysis of wheat genome as well as in wheat gene mapping, cloning, and breeding programs.
External Databases
http://dx.doi.org/10.1007/s00122-008-0764-9
Map Data
Wheat, Nanda2419 x Wangshuibai
Probe
MAG1884
[ Show all 2548 ]

GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.