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 …

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

We present here B-chrom (www. bchrom. csic. es), an online database with comprehensive
information on B chromosomes (Bs) for plants, animals and fungi. Data have been extracted …

Supernumerary (B) chromosomes have been shown to contain a wide variety of repetitive
sequences. For this reason, fluorescent in situ hybridisation (FISH) is a useful tool for …

Abstract Background The dispensable maize (Zea mays L.) B chromosome is highly
heterochromatic and widely believed to be devoid of functional genes. Although low-copy B …

B chromosomes (Bs) are dispensable components of the genomes of numerous species. In
contrast with the prevalent view that Bs do not harbor genes, our recent sequence analysis …

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 …

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 …

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 …