Cytogenic Behavior of a Knobbed Chromosome 10 in Maize

Abstract

Unlike maize plants heterozygous the abnormal chromosome 10 (K10) and the normal chromosome 10 (k10), those heterozygous for a knobbed chromosome 10 (K(T)10/k10) do not undergo preferential segregation or "meiotic drive." Ting's chromosome 10, however, does show neocentric activity, although the extent of this is not as pronounced as is the case in K10 homozygotes. The K(T)10 chromosome is considerably shorter than and is cytologically distinguishable from the K10 and the k10 chromosomes.