New evidence fromSinapis albaL. for ancestral triplication in a crucifer genome
- 1 March 2006
- journal article
- research article
- Published by Canadian Science Publishing in Genome
- Vol. 49 (3), 230-238
- https://doi.org/10.1139/g05-099
Abstract
We present clear evidence of ancestral genome triplication in Sinapis alba, a close relative of the cultivated Brassica species. Exceptionally high levels of heterozygosity in the parents of an F1intercross permitted the mapping of an estimated 87% of all detected restriction fragment length polymorphism (RFLP) loci, with each RFLP probe typically detecting 2 or 3 loci. These duplicated loci were arranged in 8 triplicated homologous linkage blocks and 2 small, duplicated, homologous linkage blocks covering the majority of the S. alba genome. Several large-scale inversions and translocations appear to have rearranged the order of loci within homologous blocks. The role of successive polyploidization events on the evolution of crucifer species is discussed.Key words: polyploidy, yellow mustard, Brassica hirta, genome duplication, hexaploid ancestor, paralogous loci.Keywords
This publication has 27 references indexed in Scilit:
- Genome redundancy and plasticity within ancient and recent Brassica crop speciesBiological Journal of the Linnean Society, 2004
- Gene for gene alignment between the Brassica and Arabidopsis genomes by direct transcriptome mappingTheoretical and Applied Genetics, 2003
- Genetic analysis and genome mapping inRaphanusGenome, 2003
- Patterns of Chromosomal Duplication in Maize and Their Implications for Comparative Maps of the GrassesGenome Research, 2001
- Analysis of the genome sequence of the flowering plant Arabidopsis thalianaNature, 2000
- An EST-enriched Comparative Map of Brassica oleracea and Arabidopsis thalianaGenome Research, 2000
- Collinearity between a 30-centimorgan segment ofArabidopsis thalianachromosome 4 and duplicated regions within theBrassica napusgenomeGenome, 1998
- Polyploidy in angiospermsTrends in Plant Science, 1997
- The Oxford GridAnnals of Human Genetics, 1991
- MAPMAKER: An interactive computer package for constructing primary genetic linkage maps of experimental and natural populationsGenomics, 1987