A ring chromosome on 2S
--Neuffer, MG

I have been maintaining stock of a ring chromosome (Ring 2S) composed of a centromere and the segment of the short arm of chromosome 2 carrying the B1:Peru allele of the B1 locus. Transmission is through the male only. The stock may be maintained by crossing as a male on the mutant cp*-1122A (also called de*-N1122A), and selecting kernels that are sectored for the collapsed phenotype. These produce seedlings that have chimeras and pale green tassels (for photos, see Figure 1 and Figure 2).

My supply of this stock is very small, so if anyone is interested in having a sample of this material please contact me soon.

Please Note: Notes submitted to the Maize Genetics Cooperation Newsletter may be cited only with consent of the authors

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