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The Owen mitochondrial genome in sugar beet (Beta vulgaris L.) : possible mechanisms of extensive rearrangements and the origin of the mitotype-unique regions

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Title: The Owen mitochondrial genome in sugar beet (Beta vulgaris L.) : possible mechanisms of extensive rearrangements and the origin of the mitotype-unique regions
Authors: Satoh, Mizuho Browse this author
Kubo, Tomohiko Browse this author →KAKEN DB
Mikami, Tetsuo Browse this author →KAKEN DB
Keywords: COMPLETE NUCLEOTIDE-SEQUENCE
ARABIDOPSIS-THALIANA
GENES
ORGANIZATION
DIVERSITY
PLANTS
SCALE
DNA
Issue Date: Aug-2006
Publisher: Springer
Journal Title: Theoretical and Applied Genetics
Volume: 113
Issue: 3
Start Page: 477
End Page: 484
Publisher DOI: 10.1007/s00122-006-0312-4
PMID: 16736139
Abstract: The mitochondrial genomes of normal fertile and male-sterile (Owen CMS) cytoplasms of sugar beet are highly rearranged relative to each other and dozens of inversional recombinations and other reshuffling events must be postulated to interconvert the two genomes. In this paper, a comparative analysis of the entire nucleotide sequences of the two genomes revealed that most of the inversional recombinations involved short repeats present at their endpoints. Attention was also focused on the origin of the Owen CMS-unique mtDNA regions, which occupy 13.6% of the Owen genome and are absent from the normal mtDNA. BLAST search was performed to assign the sequences, and as a result, 7.6% of the unique regions showed significant homology to previously determined mitochondrial sequences, 17.9% to nuclear DNA, 4.6% to mitochondrial episomes, and 0.1% to plastid DNA. Southern blot analysis revealed that additional sequences of nuclear origin may be included within the unique regions. We also found that the copies of many short repeat families are scattered throughout the unique regions. This suggests that, in addition to the incorporation of foreign DNAs, extensive duplication of short repetitive sequences and continued scrambling of mtDNA sequences may be implicated in the generation of the Owen CMS-unique regions.
Rights: The original publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/14566
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 久保 友彦

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