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园艺学报 ›› 2007, Vol. 34 ›› Issue (3): 751-754.

• 研究简报 • 上一篇    下一篇

梨自交不亲和新基因S35-RNase的克隆与表达分析

杨谷良1, 2*; 谭晓风1

  

  1. (1 中南林业科技大学经济林育种与栽培国家林业局重点实验室, 长沙410004; 2 黄冈师范学院生命科学与工程学院,湖北黄冈438000)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-06-25 发布日期:2007-06-25

Clone and Expression Analysis of a Novel S-allele: S35-RNase in Pyrusbretschneideri

YANG Gu-liang1,2*; TAN Xiao-feng   

  1. (1 The Key Laboratory of Non-wood Forest Products of the Ministry of Forestry, Central South University of Forestry and Technology, Changsha 410004, China; 2 Biology Department, Huanggang Normal University, Huanggang, Hubei 438000,China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-06-25 Published:2007-06-25

摘要: 通过RACE技术, 从早酥梨花柱中分离到一个长度为681 bp的自交不亲和基因, DNA序列分
析表明, 其开放读码框由227个氨基酸组成, 具有S2RN ase基因特有的保守组氨酸和半胱氨酸残基、高变
区和保守区等特征序列, 与己登录的S4-RNase基因DNA序列同源性最高, 达94% , 登录为一个新基因:
S35-RNase, GenBank接收号为DQ224344。通过Northern杂交, 发现该基因只在花柱中特异性表达, 并且在
大铃铛期的表达量比花前和花后3 d的表达量都高。

关键词: 梨, RACE, 自交不亲和性, S35-RNase, Northern杂交

Abstract: A new self2incompatibility gene, which contains an open reading frame of 681 nucleotides en
coding a 227 amino acid protein, was isolated from Pyrus bretschneideri cultivars of Zaosu by rap id amp lifica
tion of cDNA ends (RACE). DNA sequece analysis revealed that the isolated gene contains the specific se
quences of S-RNase, such as conserved histidines and cysteines, hypervariable region and conserved regions.
It displayed the highest homology of 94% with the embodied S4-RNase (AB014072). The new S-allele was
named S35-RNase and its accession number wasDQ224344 in GenBank. The northern blot analysis indicated
that this gene only exp ressed in p istil, with a higher exp ression level at the balloon stage than at the stage of 3
days before or after flowering.

Key words: Pyrus bretschneideri, Rapid amplification of cDNA ends, Self2incompatibility, S35-RNase, Northern blot