Molecular Genetics and Genomics

, Volume 268, Issue 2, pp 232–239 | Cite as

Complex organization of the mitochondrial genome of petaloid CMS carrot

  •  M. Robison
  •  D. Wolyn
Original Paper

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.

Cytoplasmic male sterility (CMS) Carrot Mitochondrial DNA Recombination Repeats 

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Copyright information

© Springer-Verlag 2002

Authors and Affiliations

  •  M. Robison
    • 1
  •  D. Wolyn
    • 1
  1. 1.Department of Plant Agriculture, Bovey Building, University of Guelph, Guelph, ON N1G 2W1, Canada

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