中国农业科学 ›› 2022, Vol. 55 ›› Issue (14): 2797-2811.doi: 10.3864/j.issn.0578-1752.2022.14.010

• 园艺 • 上一篇    下一篇

葡萄醇酰基转移酶编码基因遗传变异研究

冀晓昊(),刘凤之,王宝亮,刘培培,王海波()   

  1. 中国农业科学院果树研究所/农业农村部园艺作物种质资源利用重点实验室/辽宁省落叶果树矿质营养与肥料高效利用重点实验室,辽宁兴城 125100
  • 收稿日期:2021-11-01 接受日期:2021-12-31 出版日期:2022-07-16 发布日期:2022-07-26
  • 通讯作者: 王海波
  • 作者简介:冀晓昊,Tel:13610890936;E-mail: jixiaohao2006@163.com
  • 基金资助:
    国家重点研发计划(2018YFD1000200);国家现代农业产业技术体系建设专项(nycytx-29-zp);中国农业科学院创新工程(CAAS-ASTIP- 2015-RIP-04);中央级公益性科研院所基本科研业务费专项资助(Y2019PT20-03)

Genetic Variation of Alcohol Acyltransferase Encoding Gene in Grape

JI XiaoHao(),LIU FengZhi,WANG BaoLiang,LIU PeiPei,WANG HaiBo()   

  1. Fruit Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Germplasm Resources Utilization of Horticultural Crops, Ministry of Agriculture and Rural Affairs/Key Laboratory of Mineral Nutrition and Efficient Fertilization for Deciduous Fruits, Xingcheng 125100, Liaoning
  • Received:2021-11-01 Accepted:2021-12-31 Online:2022-07-16 Published:2022-07-26
  • Contact: HaiBo WANG

摘要:

【目的】开发适用于葡萄香气表型鉴定的分子标记,为葡萄分子辅助育种提供理论依据。【方法】采用固相微萃取结合气相质谱法对45个葡萄品种进行香气组分和含量测定,并分别采用Sanger测序和扩增子测序的方法对葡萄醇酰基转移酶编码基因(VvAAT)结构变异和SNP变异进行分析。【结果】45个葡萄品种中共发现65种香气组分,可以分成酯类、醇类、萜类和醛类4种类型,其中酯类香气含量表现出显著的品种差异性,‘巨峰’等20个葡萄品种酯类香气含量丰富,而‘87-1’等25个葡萄品种检测不到酯类香气;VvAAT共发现了5种结构变异类型,类型I、II、IV和V由于过早终止密码子或片段插入变异,不能正确翻译,仅类型III可以正常翻译,根据其氨基酸序列系统进化树分析结果,又可以分成III.1和III.2两种类型,结合香气测定数据,III.1为功能型,其余均为非功能型;扩增子测序及生信分析发现了8个位于外显子区域的SNP位点(T32C、A69T、G436C、A1247G、A1818T、G1929T、A1959G和C1975G),均导致了编码氨基酸的突变,可以准确区分酯香型品种和非酯香型品种,准确率为97.8%。【结论】葡萄VvAAT位点存在丰富的遗传变异,包括基因结构变异和SNP变异;位于编码区的8个SNP位点能够准确判定葡萄酯类香气表型,可以应用于葡萄分子辅助育种。

关键词: 葡萄, 香气, 醇酰基转移酶, VvAAT, 扩增子测序, 分子辅助育种

Abstract:

【Objective】The purpose of this study was to develop molecular markers suitable for the identification of grape aroma phenotypes, so as to provide a theoretical basis for grape molecular assisted breeding. 【Method】 The aroma components and content of 45 grape varieties were determined by solid-phase microextraction combined with gas-phase mass spectrometry, and the structural variation and SNP variation of VvAAT gene were analyzed by Sanger sequencing and amplicon sequencing, respectively. 【Result】A total of 65 aroma components were found in 45 grape varieties, which could be divided into four types: esters, alcohols, terpenes and aldehydes. Among them, the content of esters showed significant variety differences, and 20 grape varieties such as Kyoho were rich in volatile esters, but little volatile esters was detected in other 25 grape varieties such as 87-1. A total of 5 structural variants have been found in the VvAAT gene. Types I, II, IV and V could not be translated correctly due to premature termination codons or fragment insertion mutations. Only type III could be translated aright. According to the results of the phylogenetic tree analysis of their amino acid sequences, Type III could be divided into two types: III.1 and III.2. Combining the aroma data, it could be inferred that III.1 was functional, while the rest were non-functional. Amplicon sequencing and bioinformatics analysis revealed 8 SNP sites (T32C, A69T, G436C, A1247G, A1818T, G1929T, A1959G, and C1975G) located in the exon region of the VvAAT gene, all of which caused mutations in the coding amino acids. It could accurately distinguish between ester-rich varieties and ester-poor varieties, with an accuracy rate of 97.8%. 【Conclusion】VvAAT gene locus had abundant genetic variation, including gene structure variation and SNP variation; 8 SNP loci located in the coding region of VvAAT gene could accurately determine the phenotype of volatile esters, which could be applied to grape molecular assisted breeding.

Key words: grape, aroma, alcohol acyltransferase, VvAAT, amplicon sequencing, marker-assisted selection