Location of the genes for cytochrome oxidase subunits I and II, apocytochrome b, ?-subunit of the F1 ATPase and the ribosomal RNA genes on the mitochondrial genome of maize (Zea mays L.)

The mitochondrial S13 ribosomal protein gene is silent in wheat embryos and seedlings

“…The close physical linkage of the wheat mitochondrial S13 and ATPase 6 genes is unlike the gene organization observed for these, or any other, genes that have been mapped in maize (15) or Brassica (6). In those plants, the genes are far apart and both the ATPase 6 and S13 genes are present as single genomic copies.…”

“…14). Those mitochondrial genes that have been localized on physical maps in maize (15) and B.campestris (6), are scattered around the genome on both strands and show no conservation of gene order.…”

Sequence and transcriptional analysis of a chloroplast insert in the mitochondrial genome ofZea mays

“…Regions containing significant similarity to a 3' portion of the chloroplast 235 RNA, 4.55 RNA, 55 RNA and arginine tRNA are indicated ct235, ct4.55, ct5S and ctR respectively mtDNA genome is not near any previously identified coding region or ctDNA inserts. It resides about 15 kb from one copy of the gene for ATPase a, 50 kb from the other and entirely within a region flanked by two 12 kb direct repeats (Dawson et al 1986;Falconet et al 1984).…”

Rearrangements in maize mitochondrial genes

“…Recombinations among numerous repeats of the master mitochondrial chromosome generate subgenomic circles of various sizes (Dawson et al 1986;Lonsdale et al 1984). The differing propensities of the various repeats to recombine coupled with different rates of replication for the subgenomic circles suggest that the subgenomic circles may be present in complex stoichiometries (Schardl et al 1984).…”

“…Shortly after mapping the Brassica genome, the map of the maize mitochondrial genome was established (Dawson et al 1986;Lonsdale et al 1984). The situation In maize is similar to Brassica, although more complicated.…”