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Organization and evolution of two repetitive sequences, 18-24J and 12-13P, in the genome of Chenopodium (Amaranthaceae)
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SYSNO ASEP 0495174 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Organization and evolution of two repetitive sequences, 18-24J and 12-13P, in the genome of Chenopodium (Amaranthaceae) Author(s) Orzechowska, M. (PL)
Majka, M. (PL)
Weiss-Schneeweiss, H. (AT)
Kovařík, Aleš (BFU-R) RID, ORCID
Borowska-Zuchowska, N. (PL)
Kolano, B. (PL)Number of authors 6 Source Title Genome. - : Canadian Science Publishing - ISSN 0831-2796
Roč. 61, č. 9 (2018), s. 643-652Number of pages 10 s. Publication form Print - P Language eng - English Country CA - Canada Keywords ribosomal-rna genes ; dna-sequences ; chromosomal localization ; satellite dna ; plant genomes ; sugar-beet ; rdna loci ; quinoa ; wheat ; heterochromatin Subject RIV EI - Biotechnology ; Bionics OECD category Biochemistry and molecular biology R&D Projects GBP501/12/G090 GA ČR - Czech Science Foundation (CSF) Institutional support BFU-R - RVO:68081707 UT WOS 000444103900003 DOI 10.1139/gen-2018-0044 Annotation The abundance and chromosomal organization of two repetitive sequences named 12-13P and 18-24J were analyzed in 24 diploid and nine polyploid species of Chenopodium s.l., with special attention to Chenopodium s.s. Both sequences were predominantly present in species of Chenopodium s.s., however, differences in the amplification levels were observed among the species. The 12-13P repeat was highly amplified in all of the analyzed Eurasian species, whereas the American diploids showed a marked variation in the amplification levels. The 12-13P repeat contains a tandemly arranged 40 bp minisatellite element forming a large proportion of the genome of Chenopodium (up to 3.5%). FISH revealed its localization to the pericentromeric regions of the chromosomes. The chromosomal distribution of 12-13P delivered additional chromosomal marker for B-genome diploids. The 18-24J repeat showed a dispersed organization in all of the chromosomes of the analyzed diploid species and the Eurasian tetraploids. In the American allotetraploids (C. quinoa, C. berlandieri) and Eurasian allohexaploids (e.g., C. album) very intense hybridization signals of 18-24J were observed only on 18 chromosomes that belong to the B subgenome of these polyploids. Combined cytogenetic and molecular analyses suggests that reorganization of these two repeats accompanied the diversification and speciation of diploid (especially A genome) and polyploid species of Chenopodium s.s. Workplace Institute of Biophysics Contact Jana Poláková, polakova@ibp.cz, Tel.: 541 517 244 Year of Publishing 2019
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