An operation of a balanced lethal system in line 394 was reported previously by Salerno (MNL 58:52). This line was later crossed to a series of genetic markers to determine the chromosomal location of chlorophyll lethal genes involved in this line. The results from the F2 and F3 families of these crosses revealed that the chlorophyll lethal genes involved in this line were linked with the floury-2 gene on chromosome 4. The chromosomal location of this linkage group will be important for the future finding of heterotic regions in the maize genome.
Juan C. Salerno
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