Pioneer Hi-Bred International, Inc.
Linkage between Ms44 and C2
--Marc C. Albertsen and Mary R. Trimnell
We reported earlier that Ms41 and Ms44, both located on chromosome 4L, were determined to be non-allelic and separated by 14±2cM (Albertsen, MC and Neuffer, MG, MNL 64:52). We have subsequently obtained linkage of Ms44 with C2. We crossed Ms44 C2 with a c2 tester stock, ms44 c2. Male-sterile F1 plants, Ms44 C2/ms44 c2 were backcrossed to the c2 tester.
Progeny segregated 1:1 for purple and yellow kernels. Purple kernels
were separated from yellow kernels, planted and classified for sterility.
The following was obtained:
|Purple k's||Yellow k's|
|# sterile plants||# fertile plants||# sterile plants||# fertile plants|
|Ear row #1||17||0||0||16|
These results indicate that the Ms44 locus is located virtually
at the C2 locus. We are repeating the grow-out to determine if the
1 sterile plant from the yellow kernel class was a fluke or a true recombinant.
Dr. Steve Briggs suggested using C2-Idf to independently verify
these results. The initial crosses will be accomplished in our 1991 winter
to the MNL 66 On-Line Index
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