B chromosomes (Bs) are dispensable components of the genome exhibiting non-Mendelian
inheritance and have been widely reported on over several thousand eukaryotes, but still …

Supernumerary B chromosomes (Bs) are extra karyotype units in addition to A
chromosomes, and are found in some fungi and thousands of animals and plant species. Bs …

The endemic cichlid fishes in Lake Victoria are a model system for speciation through
adaptive radiation. Although the evolution of the sex-determination system may also play a …

Abstract Background Supernumerary B chromosomes (Bs) are a major source of
intraspecific variation in nuclear DNA amounts in numerous species of plants. They favour …

The past decade has witnessed an explosion of genome sequencing and map** in
evolutionary diverse species. While full genome sequencing of mammals is rapidly …

B chromosomes represent additional chromosomes found in many eukaryotic organisms.
Their origin is not completely understood but recent genomic studies suggest that they …

Background One of the biggest challenges in chromosome biology is to understand the
occurrence and complex genetics of the extra, non-essential karyotype elements, commonly …

Though hundreds to thousands of reports have described the distribution of B chromosomes
among diverse eukaryote groups, a comprehensive theory of their biological role has not yet …

For many years, parasitic B chromosomes have been considered genetically inert elements.
Here we show the presence of ten protein-coding genes in the B chromosome of the …

B chromosomes constitute a heterogeneous mixture of genomic parasites that are
sometimes derived intraspecifically from the standard genome of the host species, but result …