Chromosome-scale genome assembly of Japanese pear (<i>Pyrus pyrifolia</i>) variety ‘Nijisseiki’

Abstract We analyzed the genome sequence of a Japanese pear (Pyrus pyrifolia) to facilitate its genetics and genomics as well breeding programs, in which variety 'Nijisseiki' with superior flesh texture has been used parent for most cultivars. De novo assembly long reads covered 136× generated 503.9 Mb contigs consisting 114 sequences an N50 value 7.6 Mb. Contigs were assigned genetic maps establish 17 chromosome-scale sequences. In total, 44,876 high-confidence protein-encoding genes predicted, 84.3% supported by predicted transcriptome data from relatives. As expected, evidence genome-wide duplication was observed, consistent related species. This is first analysis reported pear, this resource will support programs provide new insights into physiology evolutionary history pear.