Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: March 22, 2005
Publication Date: March 23, 2005
Citation: Martin, F.N. 2005. Mitochondrial genome organization in Phytophthora; what P. infestans, P. ramorum and P. sojae tell us [Abstract]. Proceedings of Phytophthora Molecular Genetics Network Workshop. Abstract p.9. Technical Abstract: Sequence analysis of the mitochondrial DNA of P. ramorum and P. sojae are byproducts of the recent effort to sequence the nuclear genomes of these species and provide an opportunity for evaluation of genome evolution by comparison with the previously published mDNA sequences of P. infestans. The genomes reflect molecules with a circular orientation with sizes ranging from 37,957 bp for P. infestans to 42,975 bp for P. sojae. A total of 37 genes, 19 AA and a variable number of ORFs are encoded in these genomes. While the gene order in P. sojae and P. ramorum are the same, P. sojae has 5 additional ORFs. Relative to these two species the gene order in P. infestans differs in two locations due to inversions. Unlike the other two species, there is an inverted repeat of 1,137 bp present in P. ramorum that includes an unidentified ORF, adjacent spacer regions, and flanking regions of specific genes. Sequence alignments of the three genomes reveals that specific regions are more variable than others. Differences in genome organization will be discussed relative to phylogeneic relationships among the species.