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Theoretical and Applied Genetics

, Volume 75, Issue 2, pp 282–285 | Cite as

Homologies to chloroplast DNA in the nuclear DNA of a number of Chenopod species

  • M. A. Ayliffe
  • J. N. Timmis
  • N. Steele Scott
Article

Summary

Sequences homologous to chloroplast (ct)DNA have been found in nuclear DNA in five species of the Chenopodiaceae, extending the earlier observations of ‘promiscuous’ DNA in Spinacia oleracea (Timmis and Scott 1983). Using the 7.7 kbp spinach ctDNA Pst I fragment as a hybridization probe, several separately located homologies to ctDNA were resolved in the nuclear DNA of Beta vulgaris, Chenopodium quinoa, and Enchylaena tomentosa. In Chenopodium album and Atriplex cinerea the major region of homology was to a nuclear Eco RI fragment (6 kbp) indistinguishable from that in ctDNA. These homologies may therefore involve larger tracts of ctDNA because the same restriction sites are apparently retained in the nucleus. This suggests that in these latter two species there is a contrasting, more homogeneous arrangement of ctDNA transpositions in the nucleus.

Key words

Chloroplast DNA Nuclear DNA DNA homologies Chenopods 

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References

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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • M. A. Ayliffe
    • 1
  • J. N. Timmis
    • 1
  • N. Steele Scott
    • 2
  1. 1.Department of GeneticsUniversity of AdelaideAdelaideAustralia
  2. 2.Division of Horticultural ResearchCSIROAdelaideAustralia

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