Integration of Brassica A genome genetic linkage map between Brassica napus and B. rapa

Genome. 2008 Mar;51(3):169-76. doi: 10.1139/G07-113.

Abstract

An integrated linkage map between B. napus and B. rapa was constructed based on a total of 44 common markers comprising 41 SSR (33 BRMS, 6 Saskatoon, and 2 BBSRC) and 3 SNP/indel markers. Between 3 and 7 common markers were mapped onto each of the linkage groups A1 to A10. The position and order of most common markers revealed a high level of colinearity between species, although two small regions on A4, A5, and A10 revealed apparent local inversions between them. These results indicate that the A genome of Brassica has retained a high degree of colinearity between species, despite each species having evolved independently after the integration of the A and C genomes in the amphidiploid state. Our results provide a genetic integration of the Brassica A genome between B. napus and B. rapa. As the analysis employed sequence-based molecular markers, the information will accelerate the exploitation of the B. rapa genome sequence for the improvement of oilseed rape.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Brassica napus / genetics*
  • Brassica rapa / genetics*
  • Chromosome Mapping
  • Genetic Linkage*
  • Genome, Plant*
  • Polyploidy