<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">D'Emerico, S.</style></author><author><style face="normal" font="default" size="100%">Paciolla, C.</style></author><author><style face="normal" font="default" size="100%">Tommasi, F.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Contribution to the karyomorphology of some species of the genus Quercus</style></title><secondary-title><style face="normal" font="default" size="100%">SILVAE GENETICA</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">B. pubescens</style></keyword><keyword><style  face="normal" font="default" size="100%">karyotype</style></keyword><keyword><style  face="normal" font="default" size="100%">Q. robur</style></keyword><keyword><style  face="normal" font="default" size="100%">Q. suber</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus ilex</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2000</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2000///</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">49</style></volume><pages><style face="normal" font="default" size="100%">243 - 245</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In order to contribute to the knowledge of the taxonomic relationships between some species of the Quercus genus, the karyomorphology of 4 species (Quercus ilex L., Q, suber L., Q. robur L, and Q. pubescens WILLD.) was carried out. The somatic chromosome number 2n=24 was found in all taxa examined. An evident differentiation in karyotype structure of Q. ilex compared to other previous studied species has been found. Quercus suber, Q. robur and Q. pubescens possess moderately asymmetrical karyotypes. Q. suber differs from other species of the subgenus Cerris on the basis of karyological data showing similarities with Q, robur and Q. pubescens.</style></abstract><issue><style face="normal" font="default" size="100%">6</style></issue><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;pub-location: FINKENHOFSTRASSE 21, W-6000 FRANKFURT, GERMANY&lt;br/&gt;publisher: SAUERLANDERS VERLAG</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">D'Emerico, S</style></author><author><style face="normal" font="default" size="100%">Paciolla, C</style></author><author><style face="normal" font="default" size="100%">Tommasi, F</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Contribution to the karyomorphology of some species of the genus Quercus</style></title><secondary-title><style face="normal" font="default" size="100%">SILVAE GENETICA</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">B. pubescens</style></keyword><keyword><style  face="normal" font="default" size="100%">karyotype</style></keyword><keyword><style  face="normal" font="default" size="100%">Q. robur</style></keyword><keyword><style  face="normal" font="default" size="100%">Q. suber</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus ilex</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2000</style></year></dates><publisher><style face="normal" font="default" size="100%">SAUERLANDERS VERLAG</style></publisher><pub-location><style face="normal" font="default" size="100%">FINKENHOFSTRASSE 21, W-6000 FRANKFURT, GERMANY</style></pub-location><volume><style face="normal" font="default" size="100%">49</style></volume><pages><style face="normal" font="default" size="100%">243-245</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In order to contribute to the knowledge of the taxonomic relationships between some species of the Quercus genus, the karyomorphology of 4 species (Quercus ilex L., Q, suber L., Q. robur L, and Q. pubescens WILLD.) was carried out. The somatic chromosome number 2n=24 was found in all taxa examined. An evident differentiation in karyotype structure of Q. ilex compared to other previous studied species has been found. Quercus suber, Q. robur and Q. pubescens possess moderately asymmetrical karyotypes. Q. suber differs from other species of the subgenus Cerris on the basis of karyological data showing similarities with Q, robur and Q. pubescens.</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Zoldos, V</style></author><author><style face="normal" font="default" size="100%">Papes, D</style></author><author><style face="normal" font="default" size="100%">Cerbah, M</style></author><author><style face="normal" font="default" size="100%">Panaud, O</style></author><author><style face="normal" font="default" size="100%">Besendorfer, V</style></author><author><style face="normal" font="default" size="100%">Siljak-Yakovlev, S</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Molecular-cytogenetic studies of ribosomal genes and heterochromatin reveal conserved genome organization among 11 Quercus species</style></title><secondary-title><style face="normal" font="default" size="100%">TAG Theoretical and Applied Genetics</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">18S-5.8S-26 S and 5 S rRNA genes</style></keyword><keyword><style  face="normal" font="default" size="100%">FISH</style></keyword><keyword><style  face="normal" font="default" size="100%">Fluorochrome banding</style></keyword><keyword><style  face="normal" font="default" size="100%">Heterochromatin</style></keyword><keyword><style  face="normal" font="default" size="100%">karyotype</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1999</style></year></dates><volume><style face="normal" font="default" size="100%">99</style></volume><pages><style face="normal" font="default" size="100%">969-977</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Genomes of 11 Quercus species were characterized using cytogenetic (Giemsa C-banding, fluorochrome banding), molecular-cytogenetic (fluorescence in situ hybridization, FISH, to ribosomal genes) and molecular (dot-blot for ribosomal gene-copy number assessment) techniques. Ribosomal genes are the first DNA sequences to be physically mapped in oaks, and the copy number of the 18S-5.8S-26 S rRNA genes is estimated for the first time. Oak karyotypes were analysed on the basis of DAPI banding and FISH patterns; five marker chromosomes were found. In addition, chromosomal organization of ribosomal genes with respect to AT- and GC-differentiated heterochromatin was studied. Fluorochrome staining produced very similar CMA/DAPI banding patterns, and the position and number of ribosomal loci were identical for all the species studied. The 18S-5.8S-26 S rRNA genes in oak complements were represented by a major locus at the subterminal secondary constriction (SC) of the only subtelocentric chromosome pair and a minor locus at paracentromeric SC of one metacentric pair. The only 5 S rDNA locus was revealed at the paracentromeric region of the second largest metacentric pair. A striking karyotypic similarity, shown by both fluorochrome banding and FISH patterns, implies close genome relationships among oak species no matter their geographic origin (European or American) or their ecophysiology (deciduous or evergreens). Dot-blot analysis gave preliminary evidence for different copy numbers of 18S-5.8S-26 S rRNA genes in diploid genomes of Q. cerris, Q. ilex, Q. petraea, Q. pubescens and Q. robur (2700, 1300, 2200, 4000 and 2200 copies, respectively) that was correlated with the size polymorphism of the major locus.</style></abstract></record></records></xml>