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Tytuł pozycji:

New evidence confirming the CD genomic constitutions of the tetraploid Avena species in the section Pachycarpa Baum.

Tytuł :
New evidence confirming the CD genomic constitutions of the tetraploid Avena species in the section Pachycarpa Baum.
Autorzy :
Yan H; Triticeae Research Institute, Sichuan Agricultural University, Chengdu, China.
Ren Z; Triticeae Research Institute, Sichuan Agricultural University, Chengdu, China.
Deng D; Triticeae Research Institute, Sichuan Agricultural University, Chengdu, China.
Yang K; Triticeae Research Institute, Sichuan Agricultural University, Chengdu, China.
Yang C; Triticeae Research Institute, Sichuan Agricultural University, Chengdu, China.
Zhou P; Triticeae Research Institute, Sichuan Agricultural University, Chengdu, China.
Wight CP; Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, Canada.
Ren C; Baicheng Academy of Agricultural Sciences, Baicheng, China.
Peng Y; Triticeae Research Institute, Sichuan Agricultural University, Chengdu, China.
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Źródło :
PloS one [PLoS One] 2021 Jan 08; Vol. 16 (1), pp. e0240703. Date of Electronic Publication: 2021 Jan 08 (Print Publication: 2021).
Typ publikacji :
Journal Article; Research Support, Non-U.S. Gov't
Język :
English
Imprint Name(s) :
Original Publication: San Francisco, CA : Public Library of Science
MeSH Terms :
Genome, Plant*
Tetraploidy*
Avena/*genetics
Chromosomes, Plant/*genetics
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Entry Date(s) :
Date Created: 20210108 Date Completed: 20210420 Latest Revision: 20210420
Update Code :
20210421
PubMed Central ID :
PMC7793304
DOI :
10.1371/journal.pone.0240703
PMID :
33417607
Czasopismo naukowe
The tetraploid Avena species in the section Pachycarpa Baum, including A. insularis, A. maroccana, and A. murphyi, are thought to be involved in the evolution of hexaploid oats; however, their genome designations are still being debated. Repetitive DNA sequences play an important role in genome structuring and evolution, so understanding the chromosomal organization and distribution of these sequences in Avena species could provide valuable information concerning genome evolution in this genus. In this study, the chromosomal organizations and distributions of six repetitive DNA sequences (including three SSR motifs (TTC, AAC, CAG), one 5S rRNA gene fragment, and two oat A and C genome specific repeats) were investigated using non-denaturing fluorescence in situ hybridization (ND-FISH) in the three tetraploid species mentioned above and in two hexaploid oat species. Preferential distribution of the SSRs in centromeric regions was seen in the A and D genomes, whereas few signals were detected in the C genomes. Some intergenomic translocations were observed in the tetraploids; such translocations were also detected between the C and D genomes in the hexaploids. These results provide robust evidence for the presence of the D genome in all three tetraploids, strongly suggesting that the genomic constitution of these species is DC and not AC, as had been thought previously.
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