新疆农业科学 ›› 2022, Vol. 59 ›› Issue (10): 2446-2455.DOI: 10.6048/j.issn.1001-4330.2022.10.013

• 园艺特产·林业·农产品加工工程 • 上一篇    下一篇

厚皮甜瓜心部果肉蔗糖含量QTL定位及候选基因分析

杨永1(), 范蓉1, 张学军1, 李寐华1, 凌悦铭1, 张红1, 杨文莉1, 姜雪2, 张永兵1(), 伊鸿平1()   

  1. 1.新疆农业科学院哈密瓜研究中心,乌鲁木齐 830091
    2.伊犁师范大学生物与地理科学学院,新疆伊宁 835000
  • 收稿日期:2021-11-24 出版日期:2022-10-20 发布日期:2022-12-21
  • 通信作者: 张永兵,伊鸿平
  • 作者简介:杨永(1986-),男,山东人,副研究员,研究方向为甜瓜分子遗传育种,(E-mail)yangyongsj062@163.com
  • 基金资助:
    国家自然科学基金(31860567);国家西甜瓜产业技术体系厚皮甜瓜改良岗位和特色甜瓜品种改良岗位(CARS-25);新疆维吾尔自治区重点研发项目(2022B02002-3);天山创新团队(2022D14015);海南省院士创新平台

QTL Mapping and Candidate Gene Analysis of Sucrose Content in the Center Flesh of Muskmelon

YANG Yong1(), FAN Rong1, ZHANG Xuejun1, LI Meihua1, LING Yueming1, ZHANG Hong1, YANG Wenli1, JIANG Xue2, ZHANG Yongbing1(), YI Hongping1()   

  1. 1. Hami Melon Research Center, Xinjiang Academy of Agricultural Sciences, Urumqi 830091,China
    2. Colloge of Biology and Geography Sciences,Yili Normal University,Yining Xinjiang 835000,China
  • Received:2021-11-24 Online:2022-10-20 Published:2022-12-21
  • Correspondence author: ZHANG Yongbing, YI Hongping
  • Supported by:
    National Natural Science Foundation of China(31860567);China Agriculture Research System of watermelon and melon(CARS-25);Key Research and Development Program of Xinjiang Uygur Autonomas Region(2022B02002-3);Tianshan Innovation Team Project(2022D14015);The Specific Research Fund of the Innovation Platform for Academicians of Hainan Province

摘要:

【目的】运用QTL分析厚皮甜瓜心部果肉蔗糖含量,挖掘影响该性状的候选基因,为厚皮甜瓜甜味性状的遗传改良奠定理论基础。【方法】以高糖材料VZX(V醉仙)为母本和低糖材料HP(高代自交系)为父本杂交衍生的F2群体为研究对象,利用高效液相色谱仪测定果实赤道位置心部果肉蔗糖含量,从F2群体中挑选蔗糖含量极端高和极端低的单株各20个,分别构建高蔗糖池和低蔗糖池,对双亲及混合池均进行全基因组重测序(约20×覆盖深度),定位蔗糖性状的关联区间,并结合生物信息学分析候选基因。【结果】厚皮甜瓜心部果肉蔗糖含量在F2群体中基本呈正态分布,符合典型的数量性状遗传特征;对双亲及混池进行全基因组重测序,共获得有效数据32.62 G,Q20在95%以上,平均覆盖深度为17.76,比对到参考基因组上的总reads数目比例在98.72%~99.02%,测序数据质量高,参考基因组选择合理有效;在8号染色体定位到1个3.29 Mb的区间,共注释到108个基因;在初定位区间内获得1个参与糖酵解和糖异生生化过程的候选基因EVM0000647,在高糖和低糖亲本间编码区无非同义突变,但启动子区域具有大量差异位点,且表达量具有明显差异。【结论】极端混池测序(BSA)方法,在8号染色体上定位到1个影响厚皮甜瓜心部果肉蔗糖含量的QTL,大小为3.29 Mb,共注释到108个基因,其中候选基因EVM0000647,通过差异表达负调控厚皮甜瓜心部果肉蔗糖的积累。

关键词: 厚皮甜瓜; 蔗糖; QTL; 候选基因; 遗传改良; 转录组

Abstract:

【Objective】 This project aims to analyze the content of sucrose in the center flesh of muskmelon by QTL mapping and find out the candidate genes, thus laying a genetic foundation for the genetic improvement of muskmelon with high sucrose content.【Method】 The F2 population was derived from a cross between VZX with high sucrose content as the female parent and HP (high generation inbred lines) with low sucrose content as the male parent. The sucrose content determination was based on high performance liquid chromatography (HPLC). QTL for the sucrose content in the center flesh of muskmelon were detected by bulked segregant analysis (BSA) method and candidate genes were analyzed combined with bioinformatics. 【Results】 The sucrose content in the center flesh of muskmelon was approximately normal distribution in the F2 population, which was consistent with the genetic characteristics of quantitative traits. A total of 32.62 G (average 8.16 G) of valid data were obtained by whole-genome resequencing of the parents and two bulked pools, and a 3.29 Mb interval was located on chromosome 8. A total of 108 genes were annotated. After that, further GO enrichment analysis and KEGG pathway analysis were carried out. A candidate gene EVM0000647 involved in glycolysis and gluconeogenesis in the initial localization interval was obtained by combining transcription data. There were no synonymous mutations in the coding region of EVM0000647 between the high-glucose and low-glucose parents, but there were a lot of different sites in its promoter region, and the expression levels were obviously different between parents. 【Conclusion】 One QTL with 3.29 Mb interval is located on chromosome 8 based on BSA method. EVM0000647gene involved in glycolysis and gluconeogenesis pathway is identified by bioinformatics analysis. There are distinct differences in the expression levels between high-glucose and low-glucose parents, which may play a significant role in the sucrose accumulation in the center flesh of muskmelon.

Key words: muskmelon; sucrose; QTL; candidate gene; genetic improvement; RNA-seq

中图分类号: 


ISSN 1001-4330 CN 65-1097/S
邮发代号:58-18
国外代号:BM3342
主管:新疆农业科学院
主办:新疆农业科学院 新疆农业大学 新疆农学会

出版单位:《新疆农业科学》编辑部
地址:乌鲁木齐市南昌路403号新疆农业科学院
邮编:830091
电话:0991-4502046
E-mail:xjnykx-h@xaas.ac.cn


版权所有 © 《新疆农业科学》编辑部
本系统由北京玛格泰克科技发展有限公司设计开发
总访问量: 今日访问: 在线人数:
网站
微信公众号
淘宝购买
微店购买