Xl. Xuei et Pl. Skatrud, MOLECULAR KARYOTYPE ALTERATIONS INDUCED BY TRANSFORMATION IN ASPERGILLUS-NIDULANS ARE MITOTICALLY STABLE, Current genetics, 26(3), 1994, pp. 225-227
Clamped homogeneous electric field (CHEF)-gel electrophoresis was used
to define the electrophoretic molecular karyotype of Aspergillus nidu
lans strain OC-1 before and after protoplast-based genetic transformat
ion. The transforming DNA caused alterations in the molecular karyotyp
es in all transformants examined. Rather dramatic changes were observe
d in karyotypes, including apparent chromosome loss, massive size alte
rations, and the appearance of large chromosomes. Changes in molecular
karyotype were mitotically stable.