J 2022

Idahoa and Subularia: Hidden polyploid origins of two enigmatic genera of crucifers

DOGAN, Mert, Terezie MALÍK MANDÁKOVÁ, Xinyi GUO and Martin LYSÁK

Basic information

Original name

Idahoa and Subularia: Hidden polyploid origins of two enigmatic genera of crucifers

Authors

DOGAN, Mert (792 Turkey, belonging to the institution), Terezie MALÍK MANDÁKOVÁ (203 Czech Republic, belonging to the institution), Xinyi GUO (156 China, belonging to the institution) and Martin LYSÁK (203 Czech Republic, guarantor, belonging to the institution)

Edition

American Journal of Botany, St Louis, Botanical Soc Amer Inc, 2022, 0002-9122

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10611 Plant sciences, botany

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 3.000

RIV identification code

RIV/00216224:14740/22:00127509

Organization unit

Central European Institute of Technology

UT WoS

000844517500001

Keywords in English

Brassicaceae; CES clade; Cruciferae; Hyb-Seq; Lineage V; mesopolyploidy; plastome phylogeny; repeatome; Subularieae; whole-genome duplication

Tags

International impact, Reviewed
Změněno: 15/10/2024 14:49, Ing. Martina Blahová

Abstract

V originále

Premise The monotypic Idahoa (I. scapigera) and the bispecific Subularia (S. aquatica and S. monticola) belong to Brassicaceae with unclear phylogenetic relationships and no tribal assignment. To fill this knowledge gap, we investigated these species and their closest relatives by combining cytogenomic and phylogenomic methods. Methods We used whole plastome sequences in maximum likelihood and Bayesian inference analyses. We tested the phylogenetic informativeness of shared genomic repeats. We combined nuclear gene tree reconciliation and comparative chromosome painting (CCP) to examine the occurrence of past whole-genome duplications (WGDs). Results The plastid data set corroborated the sister relationship between Idahoa and Subularia within the crucifer Lineage V but failed to resolve consistent topologies using both inference methods. The shared repetitive sequences provided conflicting pwhylogenetic signals. CCP analysis unexpectedly revealed that Idahoa (2n = 16) has a diploidized mesotetraploid genome, whereas two Subularia species (2n = 28 and 30) have diploidized mesoctoploid genomes. Several ancient allopolyploidy events have also been detected in closely related taxa (Chamira circaeoides, Cremolobeae, Eudemeae, and Notothlaspideae). Conclusions Our results suggest that the contentious phylogenetic placement of Idahoa and Subularia is best explained by two WGDs involving one or more shared parental genomes. The newly identified mesopolyploid genomes highlight the challenges of studying plant clades with complex polyploidy histories and provide a better framework for understanding genome evolution in the crucifer family.

Links

GA19-07487S, research and development project
Name: Polyploidní minulost a diploidní současnost: evoluce a diversifikace jihoafrického rodu Heliophila
Investor: Czech Science Foundation, The polyploid past versus diploid present: evolution and diversification of the southern African Heliophila
LM2015047, research and development project
Name: Česká národní infrastruktura pro biologická data (Acronym: ELIXIR-CZ)
Investor: Ministry of Education, Youth and Sports of the CR, Czech National Infrastructure for Biological Data
LM2018140, research and development project
Name: e-Infrastruktura CZ (Acronym: e-INFRA CZ)
Investor: Ministry of Education, Youth and Sports of the CR
90132, large research infrastructures
Name: NCMG II