Table 1. The plant regeneration of maize
inbreeds with cytoplasm analogies. Summary. (%).
As is shown in the table, the frequency of regeneration was the highest in A654 S. The reason for differences in regeneration potentials among inbreds is clear - different frequencies of genes controlling regeneration. The question about relations between A 654 (normal cytoplasm) and their male sterile analogs A654 S, A654 C in respect to their regeneration potential is more complicated. Maybe the explanation should be searched for in the connections between nucleus and cytoplasm at the physiological and genetic levels. A genetic aspect may be very attractive if one speculates about the relationship (or lack of relationship) between nucleus genes and genes located in cytoplasm - mitochondria, chloroplasts.
This work was supported by grant B-602
from the National Fund of Scientific Investigations of the Bulgarian Ministry
of Education and Science.
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