Partial Addition of Parental Mt Subgenomes
- Leading to Novel Configurations: Mt
Types "R1" and "R2".
|The autoradiography shows signals of probe m100
with total DNA from hybrids cut with EcoRI (lane1-10). Probe m100 contains
rpl5, rps14 and cob gene. Lane 12 and 13 represent fusion
parents mt types a and
The different banding patterns detect the origin a
or b of
the corresponding genome regions in the hybrids. R1 and R2 identify the
generated recombination types. The formation of novel mitochondrial genomes
in somatic hybrids is explained in a schematic model.
|In the present study the rearrangements generated
novel configurations between plastomes and chondriomes, such as mt types
R1 and R2, which were not observed in the mt genomes of 200 different clones
representing different evolutionary branches. Moreover in view of the multiple
copies of ´normal´ mt chromosomes in a single cell it remains
unknown, in which manner just a distinct recombined mt type asserts itself
during regeneration phase. The results show, that both parents can contribute
to the new mt genome of the hybrid regenerant. Partial addition of parental
mt genome regions indicate that subunits of the mitochondrial chromosome
coexist with the main chromosome of these organelles.
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Cytoplasm Genome Research
Andreas LÖSSL, 15.10.2010