04549nam 2201153z- 450 991034667350332120231214133547.03-03897-787-X(CKB)4920000000094932(oapen)https://directory.doabooks.org/handle/20.500.12854/47144(EXLCZ)99492000000009493220202102d2019 |y 0engurmn|---annantxtrdacontentcrdamediacrrdacarrierEvolution, Composition and Regulation of Supernumerary B ChromosomesMDPI - Multidisciplinary Digital Publishing Institute20191 electronic resource (254 p.)3-03897-786-1 Supernumerary B chromosomes (Bs) are dispensable genetic elements found in thousands of species of plants and animals, and some fungi. Since their discovery more than a century ago, they have been a source of puzzlement, as they only occur in some members of a population and are absent from others. When they do occur, they are often harmful, and in the absence of “selfishness”, based on mechanisms of mitotic and meiotic drive, there appears to be no obvious reason for their existence. Cytogeneticists have long wrestled with questions about the biological existence of these enigmatic elements, including their lack of any adaptive properties, apparent absence of functional genes, their origin, sequence organization, and co-evolution as nuclear parasites. Emerging new technologies are now enabling researchers to step up a gear, to look enthusiastically beyond the previous limits of the horizon, and to uncover the secrets of these “silent” chromosomes. This book provides a comprehensive guide to theoretical advancements in the field of B chromosome research in both animal and plant systems.parent-of-origin effectsfluorescent in situ hybridizationcoverage ratio analysisribosomal DNAreactivationcytogeneticsepigeneticsheterochromatininterphase nucleuswhole genome resequencingtransmissiongrasshoppersgenome instabilitydot-like (micro) Bs?sB chromosomesupernumerary elementstranscription of heterochromatinmaternal X chromosomesupernumerary chromosomepopulation analysissupernumeraryrepeat clustersextra chromosomesgenestandem repeatsB morphotypesrepetitive DNArepetitive elementsDNA copy number variationchromosome polymorphismsatellite DNAmammalsmaize B chromosomeadditional chromosomesinactivationdriveB chromosomesFISH (fluorescence in situ hybridisation)organelle DNAOrthopteraoriginsupernumerary chromosomeskaryotype evolutionGISH (genomic in situ hybridisation)DNA compositionde novo centromere formationgenomicspaternal X chromosomeeuchromatin degradationsupernumerary chromosomal segments (SCS) evolutioncentromeresSMCProspero autumnale complexnext-generation sequencingDrosophilahost/parasite interactionApodemus peninsulaegenome evolutionevolutionteleostchromosome evolutionmicrodissected DNA probescontrolling elementmobile elementRNA-Seqkaryotypeskaryotypic characteristicsRepeatExplorerMartins Cesarauth1315346Trifonov VladimirauthHouben AndreasauthJones NeilauthBOOK9910346673503321Evolution, Composition and Regulation of Supernumerary B Chromosomes3032355UNINA