Browsing Gwyddorau Biolegol, Amgylcheddol a Gwledig / Biological, Environmental & Rural Sciences by Author "Jones, R. Neil"

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Browsing Gwyddorau Biolegol, Amgylcheddol a Gwledig / Biological, Environmental & Rural Sciences by Author "Jones, R. Neil"

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  • The B chromosome database 
    Diez, M.; Jones, R. Neil (2004)
    The database is compiled from the world literature on B chromosomes published between 1906 and 1994, and has 3484 records. A brief description is given of the history and structure of the database, which runs in Microsoft ...
  • B chromosome in hybrids of temperate cereals and grasses 
    Jenkins, Glyn M.; Jones, R. Neil (2004)
    B chromosomes are considered to be genetically inert, yet often have pronounced and surprising effects upon the A chromosome behaviour at meiosis in inter-generic and inter-specific hybrids. We review here our current ...
  • B chromosomes are more frequent in mammals with acrocentric karyotypes: support for the theory of centromeric drive 
    Trivers, Robert; Palestis, Brian G.; Jones, R. Neil; Burt, Austin (2004-02)
    The chromosomes of mammals tend to be either mostly acrocentric (having one long arm) or mostly bi–armed, with few species having intermediate karyotypes. The theory of centromeric drive suggests that this observation ...
  • B chromosomes in plants: escapees from the A chromosome genome? 
    Jones, R. Neil; Houben, Andreas (2003)
    B chromosomes are dispensable elements that do not recombine with the A chromosomes of the regular complement and that follow their own evolutionary track. In some cases, they are known to be nuclear parasites with autonomous ...
  • B chromosomes of Puschkinia libanotica are characterized by a reduced level of euchromatic histone H3 methylation marks 
    Kumke, K.; Jones, R. Neil; Houben, Andreas (2008-08-01)
    Epigenetic marks in the chromosome complement of the liliaceous plant Puschkinia libanotica were studied using immunofluorescence to detect histone modifications. In particular, a comparison was made between the euchromatic ...
  • A century of b chromosomes in plants: so what? 
    Houben, Andreas; Jones, R. Neil; Viegas, W. (2008-04-01)
    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 ...
  • Chromosomes with a life of their own 
    Puertas, M. J.; Vega, J. M.; Gonzalez-Sanchez, M.; Gonzalez-Garcia, M.; Jones, R. Neil (2008-05-01)
    B chromosomes (Bs) can be described as 'passengers in the genome', a term that has been used for the repetitive DNA which comprises the bulk of the genome in large genome species, except that Bs have a life of their own ...
  • Colchicine-induced polyploidization depends on tubulin polymerization in c-metaphase cells 
    Ressurreicao, F.; Viegas, W.; Delgado, M.; Meister, A.; Jones, R. Neil; Caperta, A. D.; Houben, Andreas (2006-05)
    The microtubule cytoskeleton plays a crucial role in the cell cycle and in mitosis. Colchicine is a microtubule-depolymerizing agent that has long been used to induce chromosome individualization in cells arrested at ...
  • A decade of 'chromosome painting' in Lolium and Festuca 
    Jones, R. Neil; Pasakinskiene, Izolda S. (2005)
    GISH has been a particularly useful technique for studying the Lolium-Festuca species complex of forage grasses. The reason for this utility is two-fold: (i) the complex is unique amongst crop plants in which fertile ...
  • A demonstration of a 1 : 1 correspondence between chiasma frequency and recombination using a Lolium perenne/Festuca pratensis substitution 
    al, et; Roberts, Luned A.; Thomas, Huw M.; King, Ian P.; Jones, R. Neil; King, Julie; Kearsey, Mike J. (2002-05)
    A single chromosome of the grass species Festuca pratensis has been introgressed into Lolium perenne to produce a diploid monosomic substitution line . The chromatin of F. pratensis and L. perenne can be distinguished by ...
  • A demonstration of a 1:1 correspondence between chiasma frequency and recombination using a Lolium perenne/Festuca pratensis substitution 
    King, Julie; Roberts, Luned A.; Kearsey, Mike J.; Thomas, Huw M.; Jones, R. Neil; Huang, Lin S.; Armstead, Ian P.; Morgan, W. Gareth; King, Ian P. (2002-05-01)
    A single chromosome of the grass species Festuca pratensis has been introgressed into Lolium perenne to produce a diploid monosomic substitution line (2n 2x 14). The chromatin of F. pratensis and L. perenne can be distinguished ...
  • Different numbers of rye B chromosomes induce identical compaction changes in distinct A chromosome domains 
    Morais-Cecilio, L.; Jones, R. Neil; Delgado, M.; Caperta, A. D.; Viegas, W.; Ribeiro, T. (2004)
    In rye each B chromosome (B) represents 5.5% of the diploid A genome. Rye Bs have several nuclear to whole plant effects although they seem to bear no genes except for the ones that lead to their maintenance within a ...
  • Dissection of rye B chromosomes and nondisjunction of the dissected segments in common wheat 
    Jones, R. Neil; Akahori, Atsushi; Wakimoto, Munenori; Tsujimoto, Hishashi; Dou, Quanwen; Nasuda, Shuhei; Niwa, Katsumasa; Tanaka, Hiroyuki; Endo, Takashi Ryu (2008-03-25)
    The rye B chromosome is a supernumerary chromosome that increases in number in its host by directed postmeiotic drive. Two types of rye B chromosomes that had been introduced into common wheat were dissected into separate ...
  • The distribution of B chromosomes across species 
    Palestis, B. G.; Trivers, R.; Burt, Austin; Jones, R. Neil (2004)
    In this review we look at the broad picture of how B chromosomes are distributed across a wide range of species. We review recent studies of the factors associated with the presence of Bs across species, and provide new ...
  • Dynamics of functional heterochromatic domains in the plant interphase nucleus 
    Viegas, W.; Frescatada, M.; Delgado, M.; Ribeiro-Varandas, E.; Jones, R. Neil (2010-05-26)
    Biologists have been fascinated for more than 2 centuries about how the nucleus in eukaryotes is organised. Certain of the component parts are well known, but the overall picture is blurred and often confusing. Small genome ...
  • Evidence for 'cross-talk' between A and B chromosomes of rye 
    Ribeiro, T.; Morais-Cecilio, L.; Piers, B.; Viegas, W.; Jones, R. Neil; Delgado, M. (2004-12)
    Spontaneous DNA insertions from supernumerary B chromosomes (Bs) into the standard A chromosome complement were detected in rye (Secale cereale L.), using fluorescent in situ hybridization (FISH) analysis with the D1100 ...
  • The floral transition in model and forage grasses 
    Donnison, Iain S.; Cisneros, Pedro; Montoya, Teresa; Armstead, Ian P.; Thomas, Barry J.; Jones, R. Neil; Morris, Phillip (2002-05)
    We have been using the classical model long-day (LD) plant Lolium temulentum Ceres, which can flower after a single inductive LD treatment, to study the floral transition in grasses. Plants of L. temulentum have been grown ...
  • Genetic and physical analysis of a single Festuca pratensis chromosome segment substitution in Lolium perenne 
    Armstead, Ian P.; King, Ian P.; Morgan, W. G.; Forster, John W.; Jones, R. Neil; Bollard, Andrea L.; Thomas, Huw M.; Hayward, Mike D.; Harper, John A. (2001-02-20)
    Molecular marker analysis and genomic in situ hybridisation (GISH) were used to examine the process of chromosome segment introgression in BC2 diploid hybrids (2n=2x=14) between Lolium perenne and Festuca pratensis. Two ...
  • Genome balance in six successive generations of the allotetraploid Festuca pratensis x Lolium perenne 
    Bocianowski, J.; Joks, W.; Zwierzykowska, E.; Jones, R. Neil; Kosmala, A.; Zwierzykowski, Z. (2006-06-14)
    In the allotetraploid, Festuca pratensis Huds. (2n = 4x = 28) £ Lolium perenne L. (2n = 4x = 28) the balance of chromatin, as determined by GISH, changes over successive generations of open pollination in favour of L. ...
  • Genome conflict in the gramineae 
    Jones, R. Neil; Pasakinskiene, Izolda S. (2005)
    The genomes of grasses and cereals include a diverse and large collection of selfish genetic elements, many of which are fossil relics of ancient origin. Some of these elements are active and, because of their selfish ...

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