Welcome to B-chrom! v 1.0
B-chrom: a database on B-chromosomes of plants, animals and fungi
B chromosomes (Bs) are additional and non-essential constituents of karyotypes. Their most significant traits are that they may be present in some but not all individuals of a population and they fail to recombine with the A chromosomes during meiosis. Taking advantage of the current and powerful literature search engines we have constructed a new resource which includes extensive data on B chromosomes in plants, animals and fungi. This comprehensive and updated catalogue of species presenting Bs will contribute to the knowledge of these elements allowing the analysis of their distribution across the tree of life and their relationship with genome size, chromosome number and ploidy level, among others.
You can use the search box above to start looking for genus or species with B-chromosomes. You can also browse major groups below or in the Browse tab.
Ugo d’Ambrosio, Maria Pilar Alonso-Lifante, Karina Barros, Ales Kovarik, Gemma Mas de Xaxars, Sònia Garcia. B-chrom: a database on B-chromosomes of plants, animals and fungi. New Phytologist 2017, 216(3): 635-642.
Pictures obtained from Wikipedia licensed under the Creative Commons Attribution Share-Alike licenses. Monocots: Lilium regale, from JLPC; eudicots: Rosa rugosa from Kurt Stüber; gymnosperms: Picea glauca, from Karen Johnson; fungi: Nectria peziza, from Lairich Rig; fish: Rutilus rutilus from Karelj; insects: Anthocharis cardamines, from Michael H. Lemmer; mammals, Apodemus flavicollis, from Vojtech Dostal.
B-chrom database 2017