Summary
Analysis of cloned SalI fragments coding for the 26S rRNA in wheat mitochondria (Triticumaestivum L.) shows that the 26S gene is contained within the same basic structural unit RS (which is about 6.6 kbp long). This repeated sequence is flanked by four different sequences I, II, III, IV in the orientations: I-RS-III, I-RS-IV, II-RS-III and II-RS-IV. This organization of the 26S gene, similar to the organization found for the 5S and 18S gene, suggests again that reciprocal intra-and/or intermolecular recombination occurs within these repeated sequences. S1 mapping and R loop mapping indicate that the 26S gene is about 3.5 kbp and has no intron.
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Falconet, D., Delorme, S., Lejeune, B. et al. Wheat mitochondrial 26S ribosomal RNA gene has no intron and is present in multiple copies arising by recombination. Curr Genet 9, 169–174 (1985). https://doi.org/10.1007/BF00436966
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DOI: https://doi.org/10.1007/BF00436966