Meiotic configuration at microsporogenesis was examined in several wil
d tetraploid and hexaploid taxa of tuber-bearing Solanum. A high frequ
ency of bivalents was observed in all of the species studied: four tet
raploid and one hexaploid taxa in Series Conicibaccata, one tetraploid
taxon in Series Piurana, a Mexican tetraploid species in Series Longi
pedicellata, and three hexaploid taxa in Series Demissa. An outlook on
evolutionary significance of the cytologically disomic behavior in th
e polyploid taxa of the tuber-bearing Solanum was presented. Further,
a genetic efficiency in introgression was discussed for an efficient g
enetic manipulation with these valuable, but under-utilized polyploid
genetic resources.