Mitochondrial genome diversity in soybean: repeats and rearrangements

C. A. Moeykens, S. A. Mackenzie, R. C. Shoemaker

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19 Scopus citations


Mitochondrial (mt) genome organization in soybean was examined at the molecular level. This study builds upon previous reports that four soybean cytoplasmic groups, Bedford, Arksoy, Lincoln, and soja-forage, are differentiated by polymorphisms detected with a 2.3 kb Hind III mtDNA probe [12]. The variation detected results from DNA alterations in a region within and around a 4.8 kb repeat. The Bedford-type cytoplasm is the only cytoplasm that contains copies of a 4.8 kb repeat in four different genomic environments, evidence that it is recombinationally active. The Lincoln- and Arksoy-type cytoplasms each contain two copies of the repeat, as well as unique fragments that appear to result from rare recombination events outside, but near, the repeat. The soja-forage-type cytoplasm contains no complete copies of the repeat, but does contain a unique truncated version of the repeat. Sequence analysis indicates that the truncation is a result of recombination across a 9 bp repeated sequence, CCCCTCCCC. The structural rearrangements that have occurred in the region surrounding the 4.8 kb repeat may provide a means to dissect species relationships and evolution within the subgenus soja.

Original languageEnglish (US)
Pages (from-to)245-254
Number of pages10
JournalPlant molecular biology
Issue number2
StatePublished - Oct 1995

All Science Journal Classification (ASJC) codes

  • Genetics
  • Agronomy and Crop Science
  • Plant Science


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