Pirate XLVIII 
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Chromosome association in haploid maize, maize-Tripsacum hybrid and the 
triploic hybrid. 1, Meta-anaphase of haploid maize showing 8 univalents 
and one bivalent. 2, Meta-anaphase of maize-Tripsacum hybrid showing 
three bivalents and 22 univalents. 3, Metaphase I of the triploid hybrid 
showing a ring of four maize chromosomes (probably due to exchange be- 
tween two non-homologous chromosomes in the F1) 8 maize bivalents and 
18 Tripsacum univalents. 1, 2 and 8, 800 &. 
