B-chromosomes and the plasticity of the species

Borisov, Yuriy Mikhaylovich

doi:10.1134/s2079059714050025

Cited by 4 publications

(4 citation statements)

References 23 publications

(29 reference statements)

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“…Despite the substantial increase of B chromosome literature reviews [6,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42] discussing their complex genetics, a deeply understandable concept of their origin is still missing. Although most of these review papers and the latest omics-based research has proposed several models to explain the origin of Bs, these models lack a clear and advanced understanding of the molecular mechanism involved during the formation of Bs.…”

Section: Genome Composition Origin and Evolution Of Bsmentioning

confidence: 99%

The Modern View of B Chromosomes Under the Impact of High Scale Omics Analyses

Ahmad

Martins

2019

Cells

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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 are uniquely characterized due to their non-Mendelian inheritance, and represent one of the best examples of genomic conflict. Over the last decades, their genetic composition, function and evolution have remained an unresolved query, although a few successful attempts have been made to address these phenomena. A classical concept based on cytogenetics and genetics is that Bs are selfish and abundant with DNA repeats and transposons, and in most cases, they do not carry any function. However, recently, the modern quantum development of high scale multi-omics techniques has shifted B research towards a new-born field that we call “B-omics”. We review the recent literature and add novel perspectives to the B research, discussing the role of new technologies to understand the mechanistic perspectives of the molecular evolution and function of Bs. The modern view states that B chromosomes are enriched with genes for many significant biological functions, including but not limited to the interesting set of genes related to cell cycle and chromosome structure. Furthermore, the presence of B chromosomes could favor genomic rearrangements and influence the nuclear environment affecting the function of other chromatin regions. We hypothesize that B chromosomes might play a key function in driving their transmission and maintenance inside the cell, as well as offer an extra genomic compartment for evolution.

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Section: Genome Composition Origin and Evolution Of Bsmentioning

confidence: 99%

The Modern View of B Chromosomes Under the Impact of High Scale Omics Analyses

Ahmad

Martins

2019

Cells

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“…The results obtained by many authors allow us to consider that and B chromosomes are of importance for organisms and possibly may play a role in their adaptations. Plants with B chromosomes are more polymorphic and adaptive to changing environment (Jones & Rees, 1982;Kunakh, 2010;Borisov, 2014;Borisov & Myshliavkina, 2019;and others). Origin and fixing of B chromosomes give the possibility to raise the adaptive possibilities of organisms.…”

Section: B Chromosomes In Different Parts Of the Ranges And Provenanc...mentioning

confidence: 99%

“…B chromosomes (Bs), supernumerary, accessory or additional chromosomes, are extra ones to ordinary (regular) chromosome sets (A chromosomes, As). They are found in vertebrate and invertebrate animals, fishes, amphibians, fungi, ferns, gymnosperm and angiosperm plants (Müntzing, 1974;Orlov, 1974;Jones, 1975Jones, , 1995Jones & Rees, 1982;Jones & Houben, 2003;Green, 2004;Palestis et al, 2004;Trivers et al, 2004;Jones et al, 2008;Kunakh, 2010;Houben et al, 2011Houben et al, , 2013Houben et al, , 2014Borisov, 2014;Datta et al, 2016;Borisov & Myshliavkina, 2019;Muratova, 2021). B chromosomes are widely distributed among different organisms and are a general phenomenon in eucaryotes.…”

Section: Introductionmentioning

confidence: 99%

B chromosomes in Conifers (Study Case of the Genus Picea A. Dietr.)

Muratova,

Sedel’nikova,

Pimenov

et al. 2023

SilvaWorld

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Data on B chromosomes in the genus Picea (Spruce) species are presented. Species of this genus are good objects for studying many problems on the role and origin of supernumerary chromosomes in conifers. Classical methods for studying chromosomes with staining of preparations with acetohematoxylin and the method of fluorescent in situ hybridization (FISH) were used. We report the B chromosomes occurrence in five Picea species and confirmed the data of different authors for seven species. At present, supernumerary chromosomes are found in 23 Picea species including the interspecies hybrid P. × fennica. B chromosomes of Picea species are smaller than A chromosomes; their size (4-6 µm) is 25-30% of the size of A chromosomes. The B chromosomes of spruce species are either meta- or submetacentric, which have been designated as B1 and B2 types respectively. The number of B chromosomes per cell in spruce species varies from one to six. It is generally agreed that B chromosomes are derived from A chromosomes through chromosome arrangements They differ from A chromosomes in sequence composition. The results allow us to consider that B chromosomes are of importance for organisms and possibly may play a role in their adaptation.

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“…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, ), revisions based on taxonomic groups (e.g. Jones et al .…”

Section: Introductionmentioning

confidence: 99%