Description

Pyrus × bretschneideri (or Pyrus bretschneideri), the ya pear or pearple or Chinese white pear, is an interspecific hybrid species of pear native to North China, where it is widely grown for its edible fruit.

Recent molecular genetic evidence confirms some relationship to the Siberian pear (Pyrus ussuriensis), but it can also be classified as a subspecies of the Chinese pear Pyrus pyrifolia.

Along with cultivars of P. pyrifolia and P. ussuriensis, the fruit is also called the nashi pear. These very juicy, white to light yellow pears, unlike the round Nashi pears (P. pyrifolia) that are also grown in eastern Asia, are shaped more like the European pear (Pyrus communis), narrow towards the stem end. The “Ya Li” (Chinese: 鸭梨; pinyin: yālí), literally "duck pear" due to its mallard-like shape, is one cultivar widely grown in China and exported around the world. Ya pears taste similar to a mild Bosc pear, but are crisp, with a higher water content and lower sugar content.

Whole Genomes

Whole Genome Sequences & Annotations for Pyrus x bretschneideri

• Pyrus x bretschneideri ASM4128383v1
• Pyrus x bretschneideri Hongxiangsu_v1

S genes

Pyrus x bretschneideri ASM4128383v1 S genes

Query	Chr	Size(bp)	Coordinates	BLASTn Hit	BLASTn %ID	Domain
PbrSFBB.XVI	CM083751.1	29508640	26246635-26247822	ON918627.1, PbrSFBB.XVI-S17	100	F-box; F_box_assoc
PbrSFBB.XIV	CM083751.1	29508640	26252981-26254201	ON918625.1, PbrSFBB.XIV-S17	99.918	F-box; F_box_assoc
PbrSFBB.XIII	CM083751.1	29508640	26267524-26268705	ON918624.1, PbrSFBB.XIII-S17	100	F-box; F_box_assoc
PbrSFBB.VI	CM083751.1	29508640	26319853-26321031	ON918617.1, PbrSFBB.VI-S17	100	F-box; F_box_assoc
PbrSFBB.IX	CM083751.1	29508640	26389695-26390897	ON918620.1, PbrSFBB.IX-S17	100	F-box; F_box_assoc
PbrSFBB.XII	CM083751.1	29508640	26447550-26448722	ON918623.1, PbrSFBB.XII-S17	99.915	F-box; F_box_assoc
PbrSFBB.XI	CM083751.1	29508640	26495676-26496860	ON918622.1, PbrSFBB.XI-S17	100	F-box; F_box_assoc
PbrSFBB.X	CM083751.1	29508640	26522903-26524084	ON918621.1, PbrSFBB.X-S17	100	F-box; F_box_assoc
PbrSFBB.I	CM083751.1	29508640	26568748-26567546	ON918613.1, PbrSFBB.I-S17	100	F-box; F_box_assoc
PbrSFBB.XV	CM083751.1	29508640	26615319-26614105	ON918626.1, PbrSFBB.XV-S17	100	F-box; F_box_assoc
PbrSFBB.IV	CM083751.1	29508640	26633136-26631952	ON918616.1, PbrSFBB.IV-S17	100	F-box; F_box_assoc
PbrSFBB.II	CM083751.1	29508640	26723230-26722037	ON918614.1, PbrSFBB.II-S17	100	F-box; F_box_assoc
PbrSFBB.III	CM083751.1	29508640	26850894-26849713	ON918615.1, PbrSFBB.III-S17	100	F-box; F_box_assoc
PbrSFBB.XX	CM083751.1	29508640	27127216-27126035	ON918630.1, PbrSFBB.XX-S17	100	F-box; F_box_assoc
PbrSFBB.VII	CM083751.1	29508640	27232329-27231157	ON918618.1, PbrSFBB.VII-S17	100	F-box; F_box_assoc
PbrSFBB.XIX	CM083751.1	29508640	27256584-27255352	ON918629.1, PbrSFBB.XIX-S17	100	F-box; F_box_assoc
PbrSFBB.XVIII	CM083751.1	29508640	27269098-27267914	ON918628.1, PbrSFBB.XVIII-S17	99.916	F-box; F_box_assoc
PbrSFBB.VIII	CM083751.1	29508640	27310514-27309324	ON918619.1, PbrSFBB.VIII-S17	100	F-box; F_box_assoc
S-RNase	CM083751.1	29508640	27073489-27073238,27073096-27072662	DQ494676.1, S34-RNase	100	RNase_T2

Downloads

The Pyrus x bretschneideri S gene sequences are available in FASTA format.

CDS and Protein (FASTA file)

S-gene_Pyrus_x_bretschneideri

Publications

Wu J, Wang Z, Shi Z, Zhang S, Ming R, Zhu S, Khan MA, Tao S, Korban SS, Wang H, Chen NJ, Nishio T, Xu X, Cong L, Qi K, Huang X, Wang Y, Zhao X, Wu J, Deng C, Gou C, Zhou W, Yin H, Qin G, Sha Y, Tao Y, Chen H, Yang Y, Song Y, Zhan D, Wang J, Li L, Dai M, Gu C, Wang Y, Shi D, Wang X, Zhang H, Zeng L, Zheng D, Wang C, Chen M, Wang G, Xie L, Sovero V, Sha S, Huang W, Zhang S, Zhang M, Sun J, Xu L, Li Y, Liu X, Li Q, Shen J, Wang J, Paull RE, Bennetzen JL, Wang J, Zhang S. The genome of the pear (Pyrus bretschneideri Rehd.). Genome Res. 2013 Feb;23(2):396-408. doi: 10.1101/gr.144311.112.

Xue H, Wang S, Yao JL, Deng CH, Wang L, Su Y, Zhang H, Zhou H, Sun M, Li X, Yang J. Chromosome level high-density integrated genetic maps improve the Pyrus bretschneideri 'DangshanSuli' v1.0 genome. BMC Genomics. 2018 Nov 21;19(1):833. doi: 10.1186/s12864-018-5224-6.

NCBI BioProject PRJNA565550. Pyrus x bretschneideri cultivar:Hongxiangsu Genome sequencing.

NCBI BioProject PRJNA1073018. Two representative Asian and European pear cultivars Raw sequence reads.