Show simple item record Houben, Andreas Jones, R. Neil Viegas, W. 2009-05-21T08:50:01Z 2009-05-21T08:50:01Z 2008-04-01
dc.identifier.citation Houben , A , Jones , R N & Viegas , W 2008 , ' A century of B chromosomes in plants : So what? ' Annals of Botany , vol 101 , no. 6 , pp. 767-775 . DOI: 10.1093/aob/mcm167 en
dc.identifier.issn 1095-8290
dc.identifier.other PURE: 101345
dc.identifier.other PURE UUID: b0b8e301-aa24-4284-9235-9917af74fd42
dc.identifier.other dspace: 2160/2270
dc.identifier.other DSpace_20121128.csv: row: 1645
dc.identifier.other IBERS: 0000017462
dc.identifier.other Ibers_20121112_1204.csv: row: 197
dc.identifier.other Scopus: 48849086231
dc.identifier.uri en
dc.description Jones, R. N., Viegas, W., Houben, A. (2008). A century of b chromosomes in plants: so what?  Annals of Botany, 101, (6), pp. 767-775 IMPF: 02.75 en
dc.description.abstract Background: Supernumerary B chromosomes (Bs) are a major source of intraspecific variation in nuclear DNA amounts in numerous species of plants. They favour large genomes, and create polymorphisms for DNA variation in natural populations. By studying Bs we can gain useful knowledge about the organization, function and evolution of genomes. There are also significant biological questions concerning the origin and structural organization of Bs, and the way in which these selfish elements can establish themselves by exploiting the replicative machinery of their host genome nucleus. Scope: It is a sine qua non that Bs originate from the A chromosomes, in a variety of ways. We can study their modes of drive and ask how it is that chromosomes which apparently lack genes can have control over their own drive process which leads to their survival in natural populations. Molecular cytogenetic studies are opening up new avenues of investigation. Population equilibria for B frequencies are determined by a balance between accumulation and harmful effects. Bs are also subject to meiotic loss due to polysomy and to elimination at meiosis as univalents. These balancing forces can be seen in the context of host/parasite interaction, based on a dissection of the genetic elements in both As and Bs (in maize) which interact to bring about a stable equilibrium, at least for a snapshot in time. Conclusions: Aside from their intrinsic enigmatic properties, B chromosomes make useful experimental tools to study genome organization. Thus far they have not been exploited for their applications, other than through the use of A-B translocations used for gene mapping in maize; but there are opportunities to use them to modulate the frequency and distribution of recombination, to diploidize allopolyploids, to study centromeres and to be developed as plant artificial chromosomes; given that they can be structurally modified and their inheritance stabilized. en
dc.format.extent 9 en
dc.language.iso eng
dc.relation.ispartof Annals of Botany en
dc.rights en
dc.subject B chromosomes en
dc.subject DNA polymorphisms en
dc.subject host-parasite interaction en
dc.subject mitotic/meiotic drive en
dc.subject applications en
dc.subject genome organization/evolution en
dc.subject centromeres en
dc.title A century of B chromosomes in plants : So what? en
dc.type /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article en
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en

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