Chromosome-scale genome assembly of Japanese pear (Pyrus pyrifolia) variety 'Nijisseiki'.

Publication Overview
TitleChromosome-scale genome assembly of Japanese pear (Pyrus pyrifolia) variety 'Nijisseiki'.
AuthorsShirasawa K, Itai A, Isobe S
TypeJournal Article
Journal NameDNA research : an international journal for rapid publication of reports on genes and genomes
Year2021
CitationShirasawa K, Itai A, Isobe S. Chromosome-scale genome assembly of Japanese pear (Pyrus pyrifolia) variety 'Nijisseiki'.. DNA research : an international journal for rapid publication of reports on genes and genomes. 2021 Feb 26.

Abstract

AIM
We analyzed the genome sequence of a Japanese pear (Pyrus pyrifolia) to facilitate its genetics and genomics as well as breeding programs, in which a variety 'Nijisseiki' with superior flesh texture has been used as a parent for most Japanese pear cultivars.

METHODS AND RESULTS
De novo assembly of long sequence reads covered 136× of the Japanese pear genome and generated 503.9 Mb contigs consisting of 114 sequences with an N50 value of 7.6 Mb. Contigs were assigned to Japanese pear genetic maps to establish 17 chromosome-scale sequences. In total, 44,876 high-confidence protein-encoding genes were predicted, 84.3% of which were supported by predicted genes and transcriptome data from Japanese pear relatives. As expected, evidence of genome-wide duplication was observed, consistent with related species.

CONCLUSION AND PERSPECTIVE
This is the first chromosome-scale genome sequence analysis reported for Japanese pear, and this resource will support breeding programs and provide new insights into the physiology and evolutionary history of Japanese pear.

Cross References
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DatabaseAccession
PMID: PubMedPMID:33638981