B-chromosomes and plasticity of the species

Abstract

The examples of various members of the animal and plant species shows a possible role of population variability in the number and morphological types of B-chromosomes in plasticity of the species.

B‐chrom: a database on B‐chromosomes of plants, animals and fungi

“…Thousands of reports on Bs have been produced during the last two centuries, yet an overview of its distribution across the tree of life is still missing, as well as a clear understanding of their role. As more and more organisms have been found to harbour accessory genetic materials over the last decades, the number of literature reviews on Bs has increased substantially, including overarching examinations (Borisov, 2014), revisions based on taxonomic groups (e.g. Jones et al (2007) and Datta et al (2016) for plants, Palestis et al (2010) for orthopterans, Makunin et al (2014) for mammals, or Galazka & Freitag (2014) and Stukenbrock & Croll (2014) for fungi), as well as reviews analysing their putative role in genetics and evolution (Camacho et al, 2000;Banaei-Moghaddam et al, 2015).…”

First Report of B Chromosomes in Caecilians (Amphibia: Gymnophiona)

“…These sequential acquisitions of particular DNA sequences by B chromosomes eventually create a multi-chromosomal mosaicism (Palestis et al, 2004a;Borisov, 2014;Houben, 2017;Valente et al, 2017).…”