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Complex organization of the mitochondrial genome of petaloid CMS carrot

Complex organization of the mitochondrial genome of petaloid CMS carrot The petaloid trait in carrot is a mitochondrially associated homeotic-like conversion of stamens into petals which results in cytoplasmic male sterility (cms), but little is understood about the phenomenon at the molecular level. Identification of region(s) of the mitochndrial (mt) genome that are causally implicated in cms may be aided by a physical map of cms-associated mtDNA. The mt genome of petaloid cms carrot is 255 kb in length and contains three pairs of repeated sequences, two in direct orientation and one in inverted orientation. All regions of the genome are present in equal stoichiometries, but the arrangement of the repeated sequences prevented the representation of the entire genome as a single master circle or multiple subgenomes. An alternative model of mtDNA replication that accounts for our data is discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Molecular Genetics and Genomics Springer Journals

Complex organization of the mitochondrial genome of petaloid CMS carrot

Molecular Genetics and Genomics , Volume 268 (2) – Oct 27, 2002

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References (36)

Publisher
Springer Journals
Copyright
Copyright © 2002 by Springer-Verlag
Subject
Life Sciences; Cell Biology; Biochemistry, general; Microbial Genetics and Genomics; Plant Genetics & Genomics; Animal Genetics and Genomics
ISSN
1617-4615
eISSN
1617-4623
DOI
10.1007/s00438-002-0740-z
pmid
12395197
Publisher site
See Article on Publisher Site

Abstract

The petaloid trait in carrot is a mitochondrially associated homeotic-like conversion of stamens into petals which results in cytoplasmic male sterility (cms), but little is understood about the phenomenon at the molecular level. Identification of region(s) of the mitochndrial (mt) genome that are causally implicated in cms may be aided by a physical map of cms-associated mtDNA. The mt genome of petaloid cms carrot is 255 kb in length and contains three pairs of repeated sequences, two in direct orientation and one in inverted orientation. All regions of the genome are present in equal stoichiometries, but the arrangement of the repeated sequences prevented the representation of the entire genome as a single master circle or multiple subgenomes. An alternative model of mtDNA replication that accounts for our data is discussed.

Journal

Molecular Genetics and GenomicsSpringer Journals

Published: Oct 27, 2002

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