Draft genome sequence of wild Prunus yedoensis reveals massive inter-specific hybridization between sympatric flowering cherries

Publication Overview
TitleDraft genome sequence of wild Prunus yedoensis reveals massive inter-specific hybridization between sympatric flowering cherries
AuthorsBaek S, Choi K, Kim GB, Yu HJ, Cho A, Jang H, Kim C, Kim HJ, Chang KS, Kim JH, Mun JH
TypeJournal Article
Journal NameGenome biology
Volume19
Issue1
Year2018
Page(s)127
CitationBaek S, Choi K, Kim GB, Yu HJ, Cho A, Jang H, Kim C, Kim HJ, Chang KS, Kim JH, Mun JH. Draft genome sequence of wild Prunus yedoensis reveals massive inter-specific hybridization between sympatric flowering cherries. Genome biology. 2018 Sep 04; 19(1):127.

Abstract

BACKGROUND
Hybridization is an important evolutionary process that results in increased plant diversity. Flowering Prunus includes popular cherry species that are appreciated worldwide for their flowers. The ornamental characteristics were acquired both naturally and through artificially hybridizing species with heterozygous genomes. Therefore, the genome of hybrid flowering Prunus presents important challenges both in plant genomics and evolutionary biology.

RESULTS
We use long reads to sequence and analyze the highly heterozygous genome of wild Prunus yedoensis. The genome assembly covers > 93% of the gene space; annotation identified 41,294 protein-coding genes. Comparative analysis of the genome with 16 accessions of six related taxa shows that 41% of the genes were assigned into the maternal or paternal state. This indicates that wild P. yedoensis is an F1 hybrid originating from a cross between maternal P. pendula f. ascendens and paternal P. jamasakura, and it can be clearly distinguished from its confusing taxon, Yoshino cherry. A focused analysis of the S-locus haplotypes of closely related taxa distributed in a sympatric natural habitat suggests that reduced restriction of inter-specific hybridization due to strong gametophytic self-incompatibility is likely to promote complex hybridization of wild Prunus species and the development of a hybrid swarm.

CONCLUSIONS
We report the draft genome assembly of a natural hybrid Prunus species using long-read sequencing and sequence phasing. Based on a comprehensive comparative genome analysis with related taxa, it appears that cross-species hybridization in sympatric habitats is an ongoing process that facilitates the diversification of flowering Prunus.

Properties
Additional details for this publication include:
Property NameValue
ISSN1474-760X
eISSN1474-760X
Publication Date2018 Sep 04
Journal AbbreviationGenome Biol.
DOI10.1186/s13059-018-1497-y
Elocation10.1186/s13059-018-1497-y
Publication ModelElectronic
Journal CountryEngland
LanguageEnglish
Language Abbreng
Publication TypeJournal Article
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PMID: PubMedPMID:30180884