--Philip S. Stinard
We report the results of a two-point linkage test between a2 and the dominant mutant amylose-extender allele, Ae-5180, on chromosome 5. The testcrosses were made as indicated in Table 1.
Table 1. Two-point linkage data for a2 and Ae-5180. Testcross:
(a2 Ae-5180/A2 Ae) X a2 a2 Ae Ae.
The following linkage relationship was established: a2-19.3-Ae-5180.
This result is consistent with the a2-ae distance of 22cM reported
on the 1991 maize linkage map, but shows a greater distance between a2
and Ae-5180 than does our previously reported data (13.1cM; MNL
62:11-13). This discrepancy may be due to differences in genetic background,
or environmental influences, and demonstrates how linkage data can vary
from replication to replication.
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