... between the knob (K7L) and the telomere, as discussed below. Another hypothesis to interpret the origin of knob amplification would be the occurrence of unequal sister chromatid recombination at the knob site. Maize knobs are heterochromatic regions that are variable in size and number among varieties...

...Yu-Lun Chien; Chien-Yu Lin; Kuan-Lin Lo; Ya-Ming Cheng The CL-repeat is a repetitive sequence that is unique to the maize B chromosome, where it resides in the centromeric knob and the first 3 distal heterochromatic regions of the long arm. Given this organization, it would be desirable to identify...

... examined in the root meristem, elongation and maturation zones of maize primary roots. Overall, the cells of the maturation zone displayed the highest level of multiple histone modifications. The lowest level of histone modification was detected in the root meristem. H3K9ac was enriched in the euchromatin...

...R.E. Masonbrink; J.A. Birchler Multiple copies of B chromosomes in maize (Zea mays) can accumulate in the genome using the B chromosome’s accumulation mechanism, specifically nondisjunction at the second pollen mitosis and preferential fertilization of the egg. Using this mechanism, we accumulated...

...C. Yu; T. Danilova; J. Zhang; J. Birchler; T. Peterson We describe the production of chromosome segmental duplications and deletions of defined length in maize. The method utilizes a collection of previously isolated transposon-induced reciprocal translocations with sequence-defined breakpoints...

...P.S. Albert; Z. Gao; T.V. Danilova; J.A. Birchler Maize is a highly diverse species on the gene sequence level. With the recent development of methods to distinguish each of the 10 pairs of homologues in somatic root tip spreads, a wide collection of maize lines was subjected to karyotype analysis...

...C.N. Topp; R.J. Okagaki; J.R. Melo; R.G. Kynast; R.L. Phillips; R.K. Dawe We report a neocentromere event on maize chromosome 3 that occurred due to chromosome breakage. The neocentromere lies on a fragment of the short arm that lacks the primary centromere DNA elements, CentC and CRM...