PMID- 9421261 OWN - NLM STAT- MEDLINE DCOM- 19980122 LR - 20191102 IS - 0967-3849 (Print) IS - 0967-3849 (Linking) VI - 5 IP - 7 DP - 1997 Nov TI - Karyotype analysis of Helianthus annuus using Giemsa banding and fluorescence in situ hybridization. PG - 451-6 AB - The karyotype of H. annuus was analysed by computer-aided image processing with respect to the chromosome length, arm ratio, occurrence and chromosomal position of intercalary heterochromatin and the location of 18S/25S and 5S ribosomal RNA genes. The karyotype was subdivided into a group of four acrocentric chromosome pairs, of which two were distinguishable by HKG (HCl, KOH, Giemsa) banding and a group of 13 meta- to submetacentric pairs. The latter could be subdivided into seven pairs with one and six pairs with two HKG bands. Three pairs of submetacentric satellite chromosomes revealed 18S/25S rDNA loci after fluorescence in situ hybridization (FISH) and silver staining. A fourth, smaller and possibly inactive, locus occurred in the terminal position on a metacentric pair. One submetacentric satellite chromosome pair revealed a 5S rRNA gene locus in the pericentromeric position; a second locus marked a submetacentric pair with one HKG band. The C-banding technique marks exclusively centromeric heterochromatin. Measurements of chromosomes in combination with Giemsa banding and FISH enabled the discrimination of most chromosome pairs of the sunflower. FAU - Schrader, O AU - Schrader O AD - Institut fur Zuchtungsmethodik bei Gemuse der Bundesanstalt fur Zuchtungsforschung an Kulturpflanzen, Quedlinburg, Germany. FAU - Ahne, R AU - Ahne R FAU - Fuchs, J AU - Fuchs J FAU - Schubert, I AU - Schubert I LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Chromosome Res JT - Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology JID - 9313452 RN - 0 (Azure Stains) RN - 0 (Coloring Agents) RN - 0 (DNA Probes) RN - 0 (DNA, Ribosomal) RN - 0 (Feulgen stain) RN - 0 (Rosaniline Dyes) SB - IM MH - Azure Stains MH - *Chromosome Banding MH - Chromosomes/chemistry/genetics MH - Coloring Agents MH - DNA Probes/genetics MH - DNA, Ribosomal/genetics MH - Helianthus/*genetics MH - Image Processing, Computer-Assisted MH - *In Situ Hybridization, Fluorescence MH - Karyotyping MH - *Rosaniline Dyes MH - Silver Staining MH - Staining and Labeling EDAT- 1998/01/08 00:00 MHDA- 1998/01/08 00:01 CRDT- 1998/01/08 00:00 PHST- 1998/01/08 00:00 [pubmed] PHST- 1998/01/08 00:01 [medline] PHST- 1998/01/08 00:00 [entrez] AID - 10.1023/a:1018412912790 [doi] PST - ppublish SO - Chromosome Res. 1997 Nov;5(7):451-6. doi: 10.1023/a:1018412912790.