- Titel
- Repeat turnover meets stable chromosomes
- Untertitel
- repetitive DNA sequences mark speciation and gene pool boundaries in sugar beet and wild beets
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-952487
- Quellenangabe
- The plant journal
Erscheinungsjahr: 2023
Jahrgang: 118
Heft: 1
Seiten: 171-190
E-ISSN: 1365-313X - Erstveröffentlichung
- 2023
- Abstract (EN)
- Sugar beet and its wild relatives share a base chromosome number of nine and similar chromosome morphologies. Yet, interspecific breeding is impeded by chromosome and sequence divergence that is still not fully understood. Since repetitive DNAs are among the fastest evolving parts of the genome, we investigated, if repeatome innovations and losses are linked to chromosomal differentiation and speciation. We traced genome and chromosome-wide evolution across 13 beet species comprising all sections of the genera Beta and Patellifolia. For this, we combined short and long read sequencing, flow cytometry, and cytogenetics to build a comprehensive framework that spans the complete scale from DNA to chromosome to genome. Genome sizes and repeat profiles reflect the separation into three gene pools with contrasting evolutionary patterns. Among all repeats, satellite DNAs harbor most genomic variability, leading to fundamentally different centromere architectures, ranging from chromosomal uniformity in Beta and Patellifolia to the formation of patchwork chromosomes in Corollinae/Nanae. We show that repetitive DNAs are causal for the genome expansions and contractions across the beet genera, providing insights into the genomic underpinnings of beet speciation. Satellite DNAs in particular vary considerably between beet genomes, leading to the evolution of distinct chromosomal setups in the three gene pools, likely contributing to the barriers in beet breeding. Thus, with their isokaryotypic chromosome sets, beet genomes present an ideal system for studying the link between repeats, genomic variability, and chromosomal differentiation and provide a theoretical fundament for understanding barriers in any crop breeding effort.
- Andere Ausgabe
- Link zum Artikel, der zuerst in der Zeitschrift „The plant journal” im Verlag Wiley erschienen ist.
DOI: 10.1111/tpj.16599 - Freie Schlagwörter (EN)
- genome divergence, chromosomes, speciation, repetitive DNA, transposable elements, satellite DNAs, crop wild relatives, sugar beet, Beta, Patellifolia
- Klassifikation (DDC)
- 580
- Verlag
- Wiley, Oxford [u.a.]
- Förder- / Projektangaben
- Ministerium für Bildung, Jugend und Sport der Tschechischen Republik (BMBF)
Tschechische Nationale Infrastruktur für biologische Daten
(ELIXIR CZ)
ID: LM2015047 - Bundesministerium für Bildung und Forschung Stabilität und Vererbbarkeit von DNA-Methylierungen in Zuckerrübe: Einfluss auf phänotypische Plastizität, Aktivierung von transponiblen Elementen und Potential für die Pflanzenzüchtung - Teilprojekt A
(EpiC-EpicBeet)
ID: 031B1221A - Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa2-952487
- Veröffentlichungsdatum Qucosa
- 17.01.2025
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
CC BY 4.0