PMID- 9352644 OWN - NLM STAT- MEDLINE DCOM- 19980202 LR - 20190914 IS - 0831-2796 (Print) IS - 0831-2796 (Linking) VI - 40 IP - 5 DP - 1997 Oct TI - Physical localisation of repetitive DNA sequences in Alstroemeria: karyotyping of two species with species-specific and ribosomal DNA. PG - 652-8 AB - Fluorescence in situ hybridization (FISH) was used to localise two species-specific repetitive DNA sequences, A001-I and D32-13, and two highly conserved 25S and 5S rDNA sequences on the metaphase chromosomes of two species of Alstroemeria. The Chilean species, Alstroemeria aurea (2n = 16), has abundant constitutive heterochromatin, whereas the Brazilian species, Alstroemeria inodora, has hardly any heterochromatin. The A. aurea specific A001-I probe hybridized specifically to the C-band regions on all chromosomes. The FISH patterns on A. inodora chromosomes using species-specific probe D32-13 resembled the C-banding pattern and the A001-I pattern on A. aurea chromosomes. There were notable differences in number and distribution of rDNA sites between the two species. The 25S rDNA probe revealed 16 sites in A. aurea that closely colocalised with A001-I sites and 12 in A. inodora that were predominantly detected in the centromeric regions. FISH karyotypes of the two Alstroemeria species were constructed accordingly, enabling full identification of all individual chromosomes. These FISH karyotypes will be useful for monitoring the chromosomes of both Alstroemeria species in hybrids and backcross derivatives. FAU - Kamstra, S A AU - Kamstra SA AD - Department of Plant Breeding, Graduate School of Experimental Plant Sciences, Wageningen Agricultural University, The Netherlands. -ilvan.Kamstra@users.pv.wau.nl FAU - Kuipers, A G AU - Kuipers AG FAU - De Jeu, M J AU - De Jeu MJ FAU - Ramanna, M S AU - Ramanna MS FAU - Jacobsen, E AU - Jacobsen E LA - eng PT - Journal Article PL - Canada TA - Genome JT - Genome JID - 8704544 RN - 0 (DNA, Plant) RN - 0 (DNA, Ribosomal) RN - 0 (Fluorescent Dyes) RN - 0 (Indoles) RN - 47165-04-8 (DAPI) SB - IM MH - Brazil MH - Chile MH - Chromosomes/chemistry MH - DNA, Plant/*analysis MH - DNA, Ribosomal/*analysis MH - Fluorescent Dyes/metabolism MH - In Situ Hybridization, Fluorescence MH - Indoles/metabolism MH - Karyotyping MH - Plants/*genetics MH - *Repetitive Sequences, Nucleic Acid MH - Species Specificity EDAT- 1997/11/14 00:00 MHDA- 1997/11/14 00:01 CRDT- 1997/11/14 00:00 PHST- 1997/11/14 00:00 [pubmed] PHST- 1997/11/14 00:01 [medline] PHST- 1997/11/14 00:00 [entrez] AID - 10.1139/g97-086 [doi] PST - ppublish SO - Genome. 1997 Oct;40(5):652-8. doi: 10.1139/g97-086.