Re: (Fwd) Re: Genetics (fwd)

Linda,

Yes,  the mechanism is well understood, it's simple maternal 
inheritance through the cytoplasm. C. S. Levings lab at NCSU came up 
with how the susceptibility is coded in the chloroplast DNA, but I 
don't remember details about it, that is whether the susceptibility 
to corn blight is a result of the mechanism of male sterility in 
T-cytoplasm, or whether they are just linked. I think they just found 
the spot that coded for susceptibility.
This does not apply to iris, as iris are not susceptable to the 
causal organism, Helminthosporium maidis.

The other example about the corn seed lot was strictly phenotypic, 
and not inherited. Of course, those hybrids are made again as F1's 
each year, anyway, so that lot was for feed corn production, anyway.
regards,
steve
J. Steven Brown              Mt. Gretna Gardens      
Genetic Consultant          
                             Iris and Daylilies:  
                             Breeding and Production  
2493 Pinch Road
Manheim, PA 17545-9466
USA                     Internet:jsbrown@redrose.net
(717) 664-5080          Homepage:"http://www.success.net/
                                         mggarden/"
      fax 5081
Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index