Allelism testing of miscellaneous stocks in Maize COOP phenotype only collection --Jackson, JD This report summarizes allele testing of miscellaneous stocks characterized by phenotype only in the Maize Genetics COOP Stock Center collection. Some of these stocks have been found in other COOP stocks and some have been sent in by cooperators over the years. In most cases crosses were made between known heterozygotes and homozygous plants. Plants were scored at the seedling stage and again at maturity. Proposed new designations have been assigned to these alleles. These stocks have been increased and placed on the 2000 stocklist. It is expected that with further sorting and allelism testing of mutations characterized by phenotype only, additional alleles of characterized mutants will be discovered and placed in the main collection.
previous designation allelism test with ra1 allelism test with ra2 new designation
ra*-PI262495 positive 

(ra*/ra1= 24/24 plts.)

(+/ra* // ra1=10/24)

negative ra1-PI262495
ra*-4889 negative

(+/ra* // ra1=0/90)


(+/ra* // +/ra2=0/96)


note: ra1-PI262495 tassel has good ra1 phenotype. Ear has weak or no ramosa phenotype.

gs1-PI262495 may segregate in this stock.

note: ra*-4889 has ramosa-like tassel; ear has no ramosa phenotype.
previous designation allelism test with ps1-Sprague   new designation
ps*-8205 positive (3 out of 3)   ps1-8205
previous designation allelism test with gl1 allelism test with gl8 new designation
gl*-dy positive (2 out of 2) negative gl1-dy

note: gl1-dy traces back to Coop1953-159: Nelson 9947-4. This is also source of mn1 & dy1.

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

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