Results 61 to 70 of about 653 (155)

Dynamic distribution patterns of ribosomal DNA and chromosomal evolution in Paphiopedilum, a lady's slipper orchid [PDF]

open access: yes, 2011
Background Paphiopedilum is a horticulturally and ecologically important genus of ca. 80 species of lady's slipper orchids native to Southeast Asia.
Tianying Lan, Victor A Albert
core   +2 more sources

Heterochromatin heteromorphism in Holhymenia rubiginosa (Heteroptera: Coreidae)

open access: yesEuropean Journal of Entomology, 2008
Heterochromatin is one of the most dynamic components in the genome of species. Previous studies on the heterochromatin content and distribution in Heteroptera (insects with holokinetic chromosomes) have shown that the species belonging to the family ...
María José BRESSA   +3 more
doaj   +1 more source

Advanced microscopic approaches to the study of eukaryotic chromosomes [PDF]

open access: yes, 2006
Since the first discoveries of Schneider and Flemming, several papers have been published on chromosome structure making the understanding of chromatin organization in chromosomes one of the most attractive topics of the current biosciences.
BORSATTI, Federica, MANDRIOLI, Mauro
core   +1 more source

DNA binding and meiotic chromosomal localization of the drosophila nod kinesin-like protein [PDF]

open access: yes, 1995
The Drosophila no distributive disjunction (nod) gene encodes a kinesin-like protein that has been proposed to push chromosomes toward the metaphase plate during female meiosis.
Badve   +41 more
core   +1 more source

Variability in the karyotypes, testes and ovaries of planthoppers of the families Issidae, Caliscelidae, and Acanaloniidae (Hemiptera: Fulgoroidea)

open access: yesEuropean Journal of Entomology, 2006
The aim of this study was to obtain information on the karyotypes, testes and ovaries of three fulgoroid families, mainly in the Issidae but also in the Caliscelidae and Acanaloniidae. For the Issidae, the data is for 19 species belonging to 11 genera of
Anna MARYAŃSKA-NADACHOWSKA   +3 more
doaj   +1 more source

Analysis of insect holocentric chromosomes by atomic force microscopy [PDF]

open access: yes, 2003
In order to go in depth into the analysis of holocentric chromosome structure, atomic force microscopy (AFM) was applied to metaphase plates of the aphid Megoura viciae.
MANDRIOLI, Mauro, MANICARDI, Gian Carlo
core   +1 more source

Distribution of 45S rDNA sites in chromosomes of plants: Structural and evolutionary implications

open access: yesBMC Evolutionary Biology, 2012
Background 45S rDNA sites are the most widely documented chromosomal regions in eukaryotes. The analysis of the distribution of these sites along the chromosome in several genera has suggested some bias in their distribution.
Roa Fernando, Guerra Marcelo
doaj   +1 more source

Karyotype and male pre-reductional meiosis of the sharpshooter Tapajosa rubromarginata (Hemiptera: Cicadellidae)

open access: yesRevista de Biología Tropical, 2011
Cicadellidae in one of the best represented families in the Neotropical Region, and the tribe Proconiini comprises most of the xylem-feeding insects, including the majority of the known vectors of xylem-born phytopathogenic organisms. The cytogenetics of
Graciela R de Bigliardo   +3 more
doaj   +2 more sources

Autosomal univalents as a common meiotic feature in Jadera haematoloma (Herrich-Schaeffer, 1847) and Jadera sanguinolenta (Fabricius, 1775) (Heteroptera: Rhopalidae: Serinethinae)

open access: yesEuropean Journal of Entomology, 2001
So far, available cytogenetic data on 24 species of Rhopalidae reveal a male diploid chromosome number of 13, with a pair of m chromosomes and an X0/XX (male/female) sex chromosome determining system.
María José BRESSA   +3 more
doaj   +1 more source

Mediterranean species of the spittlebug genus "Philaenus" : modes of chromosome evolution [PDF]

open access: yes, 2012
The evolution of karyotypes and sex determination system of Philaenus Stål (Auchenorrhyncha: Aphrophoridae) species is studied here in detail. The most plausible scenario of chromosomal rearrangements accompanying phylogenetic differentiation in ...
Drosopoulos, Sakis   +3 more
core   +1 more source

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