Unprecedented reorganization of holocentric chromosomes provides insights into the enigma of lepidopteran chromosome evolution. [PDF]
Sci Adv, 2019 Unprecedented reorganization in a butterfly genome sheds light on the enigma of holocentric chromosome evolution.
Hill J +19 more
europepmc +18 more sources
Whole-Genome Analysis Reveals the Dynamic Evolution of Holocentric Chromosomes in Satyrine Butterflies. [PDF]
Genes (Basel), 2023 Butterfly chromosomes are holocentric, i.e., lacking a localized centromere. Potentially, this can lead to rapid karyotypic evolution through chromosome fissions and fusions, since fragmented chromosomes retain kinetic activity, while fused chromosomes are not dicentric. However, the actual mechanisms of butterfly genome evolution are poorly understood.
Pazhenkova EA, Lukhtanov VA.
europepmc +3 more sources
Holocentric chromosomes: convergent evolution, meiotic adaptations, and genomic analysis [PDF]
Chromosome Research, 2012 In most eukaryotes, the kinetochore protein complex assembles at a single locus termed the centromere to attach chromosomes to spindle microtubules. Holocentric chromosomes have the unusual property of attaching to spindle microtubules along their entire length.
Daniël P Melters, Leocadia V Paliulis
exaly +3 more sources
Cytogenetic analysis on the holocentric chromosomes of the cabbage aphid Brevicoryne brassicae [PDF]
Caryologia, 2003 Chromatin organization in the holocentric chromosomes of the aphid Brevicoryne brassicae has been investigated at a cytological level after C-banding, NOR, Giemsa, DAPI and CMA(3) staining. C-banding technique showed the presence of heterochromatic bands
Davide Bizzaro +2 more
exaly +2 more sources
Chiasmatic and achiasmatic inverted meiosis of plants with holocentric chromosomes. [PDF]
Nat Commun, 2014 AbstractMeiosis is a specialized cell division in sexually reproducing organisms before gamete formation. Following DNA replication, the canonical sequence in species with monocentric chromosomes is characterized by reductional segregation of homologous chromosomes during the first and equational segregation of sister chromatids during the second ...
Cabral G +4 more
europepmc +6 more sources
Chromosome number evolves at equal rates in holocentric and monocentric clades.
PLoS Genetics, 2020 Despite the fundamental role of centromeres two different types are observed across plants and animals. Monocentric chromosomes possess a single region that function as the centromere while in holocentric chromosomes centromere activity is spread across ...
Sarah N Ruckman +3 more
doaj +4 more sources
Holocentric chromosomes: from tolerance to fragmentation to colonization of the land. [PDF]
Ann Bot, 2018 The dispersed occurrence of holocentric chromosomes across eukaryotes implies they are adaptive, but the conditions under which they confer an advantage over monocentric chromosomes remain unclear. Due to their extended kinetochore and the attachment of spindle microtubules along their entire length, holocentric chromosomes tolerate fragmentation ...
Zedek F, Bureš P.
europepmc +4 more sources
Distribution and molecular composition of heterochromatin in the holocentric chromosomes of the aphid Rhopalosiphum padi (Hemiptera: Aphididae) [PDF]
Genetica, 2010 In order to study the structure of holocentric chromosomes in aphids, the localization and the composition of Rhopalosiphum padi heterochromatin and rDNA genes have been evaluated at cytogenetic and molecular level.
Gian Carlo Manicardi, Mauro Mandrioli
exaly +2 more sources
Unlocking holocentric chromosomes: new perspectives from comparative and functional genomics? [PDF]
Curr Genomics, 2012 The presence of chromosomes with diffuse centromeres (holocentric chromosomes) has been reported in several taxa since more than fifty years, but a full understanding of their origin is still lacking. Comparative and functional genomics are nowadays furnishing new data to better understand holocentric chromosome evolution thus opening new perspectives ...
Mandrioli M, Manicardi GC.
europepmc +4 more sources
X-linked heterochromatin distribution in the holocentric chromosomes of the green apple aphid Aphis pomi [PDF]
Genetica, 2005 Chromatin organization in the holocentric chromosomes of the green apple aphid Aphis pomi has been investigated at a cytological level after C-banding, NOR, Giemsa, fluorochrome staining and fluorescent in situ hybridization (FISH).
Stefano Cassanelli, Gian Carlo Manicardi
exaly +2 more sources