Localization and organization of tRNA genes on the mitochondrial genomes of fertile and male sterile lines of maize
- 1 September 1990
- journal article
- research article
- Published by Springer Nature in Molecular Genetics and Genomics
- Vol. 223 (2) , 224-232
- https://doi.org/10.1007/bf00265058
Abstract
Maize mitochondrial (mt) tRNA genes were localized on the mt master circles of two fertile lines (WF9-N and B37-N) and of one cytoplasmic male sterile line (B37-cmsT) of maize. The three genomes contain 16 tRNA genes with 14 different anticodons which correspond to 13 amino acids. Out of these 16 tRNA genes, 6 show a high degree of homology with the corresponding chloroplast (cp) tRNA genes and were shown to originate from cp DNA insertions and to be expressed in the mitochondria. The organization of the mt tRNA genes in both fertile lines is similar. The same genes are found, in the same environment, as judged from the restriction maps, in fertile and male sterile lines that have the same nuclear background, but the relative organization of the mt tRNA genes on the master circle is completely different.Keywords
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