Description

Pyrus pyrifolia is a species of pear tree native to southern China and northern Indochina, and have been introduced to Korea, Japan and other parts of the world. The tree's edible fruit is known by many names, including Asian pear, Persian pear, Japanese pear, Chinese pear, Korean pear, Taiwanese pear, apple pear, zodiac pear, three-halves pear, papple, naspati and sand pear. Along with cultivars of P. × bretschneideri and P. ussuriensis, the fruit is also called the nashi pear. Cultivars derived from Pyrus pyrifolia are grown throughout East Asia, and in other countries such as India, Pakistan, Nepal, Australia, New Zealand, and the United States. Traditionally in East Asia the tree's flowers are a popular symbol of early spring, and it is a common sight in gardens and the countryside.

The fruits are not generally baked in pies or made into jams because they have a high water content and a crisp, grainy texture, very different from the European varieties. They are commonly served raw and peeled. The fruit tends to be quite large and fragrant, and when carefully wrapped (it has a tendency to bruise because of its juiciness), it can last for several weeks (or more) in a cold, dry place.

Whole Genomes

Whole Genome Sequences & Annotations for Pyrus pyrifolia

• Pyrus pyrifolia PPY_r1.0

S genes

Pyrus pyrifolia PPY_r1.0 S genes

Query	Chr	Size(bp)	Coordinates	BLASTn Hit	BLASTn %ID	Domain
PpySFBB.XVI	PPY_r1.0chr17	31990591	29400500-29401687	ON918627.1, PbrSFBB.XVI-S17	98.91	F-box; F_box_assoc
PpySFBB.XIV	PPY_r1.0chr17	31990591	29417387-29418607	ON918625.1, PbrSFBB.XIV-S17	98.85	F-box; F_box_assoc
PpySFBB.XIII	PPY_r1.0chr17	31990591	29427360-29428541	ON918624.1, PbrSFBB.XIII-S17	99.58	F-box; F_box_assoc
PpySFBB.IX	PPY_r1.0chr17	31990591	29453987-29452785	ON918620.1, PbrSFBB.IX-S17	97.1	F-box; F_box_assoc
PpySFBB.VI	PPY_r1.0chr17	31990591	29486571-29485393	ON918617.1, PbrSFBB.VI-S17	98.56	F-box; F_box_assoc
PpySFBB.III	PPY_r1.0chr17	31990591	29531116-29532297	ON918615.1, PbrSFBB.III-S17	95.99	F-box; F_box_assoc
PpySFBB.II	PPY_r1.0chr17	31990591	29569337-29570527	ON918614.1, PbrSFBB.II-S17	95.14	F-box; F_box_assoc
PpySFBB.IV	PPY_r1.0chr17	31990591	29575064-29576248	ON918616.1, PbrSFBB.IV-S17	94.6	F-box; F_box_assoc
PpySFBB.VII	PPY_r1.0chr17	31990591	29624823-29626001	ON918618.1, PbrSFBB.VII-S17	95.67	F-box; F_box_assoc
PpySFBB.VII.2	PPY_r1.0chr17	31990591	29655787-29656965	ON918618.1, PbrSFBB.VII-S17	91.1	F-box; F_box_assoc
PpySFBB.XI	PPY_r1.0chr17	31990591	29687115-29685931	ON918622.1, PbrSFBB.XI-S17	93.84	F-box; F_box_assoc
PpySFBB.XVIII	PPY_r1.0chr17	31990591	29733172-29731985	ON918628.1, PbrSFBB.XVIII-S17	87.5	F-box; F_box_assoc
PpySFBB.I	PPY_r1.0chr17	31990591	29796689-29797891	ON918613.1, PbrSFBB.I-S17	94.02	F-box; F_box_assoc
PpySFBB.X	PPY_r1.0chr17	31990591	29814701-29813520	ON918621.1, PbrSFBB.X-S17	95.35	F-box; F_box_assoc
PpySFBB.XII	PPY_r1.0chr17	31990591	29835171-29833999	ON918623.1, PbrSFBB.XII-S17	95.31	F-box; F_box_assoc
PpySFBB.XV	PPY_r1.0chr17	31990591	29926426-29925194	ON918626.1, PbrSFBB.XV-S17	94.73	F-box; F_box_assoc
PpySFBB.XIX	PPY_r1.0chr17	31990591	29982617-29981385	ON918629.1, PbrSFBB.XIX-S17	97.08	F-box; F_box_assoc
PpySFBB.VIII	PPY_r1.0chr17	31990591	30046349-30045159	ON918619.1, PbrSFBB.VIII-S17	98.99	F-box; F_box_assoc
S-RNase	PPY_r1.0chr17	31990591	29677347-29677592,29678746-29679180	D49527.1	100	RNase_T2

Downloads

The Pyrus pyrifolia S gene sequences are available in FASTA format.

CDS and Protein (FASTA file)

S-gene_Pyrus_pyrifolia

Publications

Shirasawa K, Itai A, Isobe S. Chromosome-scale genome assembly of Japanese pear (Pyrus pyrifolia) variety 'Nijisseiki'. DNA Res. 2021 May 2;28(2):dsab001. doi: 10.1093/dnares/dsab001.

Gao Y, Yang Q, Yan X, Wu X, Yang F, Li J, Wei J, Ni J, Ahmad M, Bai S, Teng Y. High-quality genome assembly of 'Cuiguan' pear (Pyrus pyrifolia) as a reference genome for identifying regulatory genes and epigenetic modifications responsible for bud dormancy. Hortic Res. 2021 Sep 1;8(1):197. doi: 10.1038/s41438-021-00632-w.

Sun M, Yao C, Shu Q, He Y, Chen G, Yang G, Xu S, Liu Y, Xue Z, Wu J. Telomere-to-telomere pear (Pyrus pyrifolia) reference genome reveals segmental and whole genome duplication driving genome evolution. Hortic Res. 2023 Oct 12;10(11):uhad201. doi: 10.1093/hr/uhad201.