High-resolution mapping of the Brassica napus Rfp restorer locus using Arabidopsis-derived molecular markers.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Nataša FormanováGregory G Brown

Abstract

The two forms of cytoplasmic male sterility (CMS) native to the oilseed rape or canola species Brassica napus, nap and pol, have novel features that may provide insight into the molecular mechanisms through which CMS/nuclear restorer systems evolve. One such feature is the finding that the distinct nuclear restorer genes for the two systems represent different alleles or haplotypes of the same nuclear locus. Improved understanding of how these systems have evolved will require molecular cloning and characterization of this novel locus. We have employed an approach that exploits the regional co-linearity between the Arabidopsis and Brassica genomes to construct a high-resolution genetic map of the nuclear restorer for the pol system, Rfp. Specifically, Arabidopsis-derived sequences have been used as a set of ordered RFLP probes to localize Rfp to a region of the B. napus genome equivalent to a 115 kb interval on Arabidopsis chromosome 1. Based on the known relationship of physical distances between orthologous segments of Arabidopsis and Brassica chromosomes, it is anticipated that the B. napus restorer locus is now mapped to sufficient resolution to permit its isolation and characterization.

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Citations

Mar 3, 2012·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Yanzhou XieGuangsheng Yang
May 23, 2012·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Zhi LiuGuangsheng Yang
Nov 26, 2010·Biotechnology Advances·Humira SonahTilak R Sharma
Oct 27, 2016·BMC Genomics·Lydiane Gaborieau, Gregory G Brown

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