四川农业大学学报 ›› 2022, Vol. 40 ›› Issue (2): 172-178.doi: 10.16036/j.issn.1000-2650.202201050

• 特别策划:“蔬·果·茶”研究专栏 • 上一篇    下一篇

枇杷果肉颜色调控关键基因PSY2A的分子标记开发与应用

宋海岩1,2, 孙淑霞2, 陈栋2, 李靖2, 涂美艳2, 徐子鸿1,2, 娄红霞1, 龚荣高1,*, 江国良1,2,*   

  1. 1.四川农业大学园艺学院,成都 611130;
    2.四川省农业科学院园艺研究所&农业农村部西南地区园艺作物生物学与种质创制重点实验室,成都 610066
  • 收稿日期:2022-01-10 出版日期:2022-04-30 发布日期:2022-05-05
  • 通讯作者: *龚荣高,博士,教授,主要从事园艺果树生态生理和栽培技术研究工作,E-mail:gongronggao@tom.com;江国良,博士,研究员,主要从事果树新品种选育及栽培技术研究工作,E-mail:jgl22@hotmail.com。
  • 作者简介:宋海岩,博士研究生。
  • 基金资助:
    第三次全国农作物种质资源普查与收集行动(19210125); 四川省农作物畜禽育种攻关(21ZDYF2196); 四川省主要经济作物分子育种平台(2021YFYZ0010); 特色水果四川省青年科技创新研究团队(20CXTD0041); 国家成都农业科技中心地方财政专项资金项目(NASC2021AT04)

Development and Application of Molecular Marker for the Key Gene EjPSY2A of Flesh Color Regulation in Loquat

SONG Haiyan1,2, SUN Shuxia2, CHEN Dong2, LI Jing2, TU Meiyan2, XU Zihong1,2, LOU Hongxia1, GONG Ronggao1,*, JIANG Guoliang1,2,*   

  1. 1. College of Horticulture,Sichuan Agricultural University,Chengdu 611130,China;
    2. Horticulture Research Institute of Sichuan Academy of Agricultural Sciences,Southwestern Key Laboratory of Horticultural Crops Biology and Germplasm Enhancement,Ministry of Agriculture and Rural Affairs,Chengdu 610066,China
  • Received:2022-01-10 Online:2022-04-30 Published:2022-05-05

摘要: 【目的】 为开发准确的枇杷果肉颜色早龄鉴定分子标记,加速枇杷品种改良进程。【方法】 基于枇杷八氢番茄红素合成酶基因EjPSY2A在黄肉和白肉枇杷品种间的序列差异设计2对InDel分子标记,经初步筛选后选取分型结果清晰的引物PSY2A-2对85份枇杷种质资源与杂交后代分型鉴定的准确性进行验证,并通过TA克隆方法对EjPSY2A位点扩增片段的正确性进一步验证。【结果】 所有42份白肉枇杷材料具有纯合的EjPSY2Ad基因型,而43份黄肉枇杷材料全部为纯合的EjPSY2A基因型或者EjPSY2AdEjPSY2A杂合基因型,并通过TA克隆的方法证实了‘大五星’枇杷的扩增大片段为纯合EjPSY2A等位基因。【结论】 开发的PSY2A-2分子标记可以准确地将黄肉和白肉枇杷种质资源区分,对指导枇杷杂交后代早龄选择育种具有重要意义,有助于加速枇杷育种工作的进程。

关键词: 枇杷, 果肉颜色, 分子标记, EjPSY2A

Abstract: 【Objective】 This paper aims to develop a reliable molecular marker for loquat flesh color identification at juvenile period so as to accelerate the cultivar improvement process. 【Method】 In this study,we designed two InDel molecular markers were designed based on the sequence difference of phytoene synthase gene EjPSY2A between yellow- and white-fleshed loquat varieties. A primer PSY2A-2 with clear genotyping results was selected after preliminary screening,and then its identification accuracy was detected with 85 loquat germplasm resources and hybrids worldwide,also the sequence of amplification product with the primer PSY2A-2 was further confirmed using TA cloning method. 【Result】 The results showed that all 42 white-fleshed loquat samples possessed homozygous EjPSY2Ad genotype,all 43 yellow-fleshed loquat samples possessed homozygous EjPSY2A genotype or heterozygous EjPSY2A and EjPSY2Ad genotype. It was confirmed that the amplification product of ‘Dawuxing’ was a homozygous EjPSY2A allele with TA cloning method. 【Conclusion】 The newly-developed InDel molecular marker PSY2A-2 can accurately distinguish the yellow- and white-fleshed loquat germplasm resources,which has a significant meaning for early selective breeding in loquat hybrids and can help to accelerate the process of loquat breeding.

Key words: loquat, flesh color, molecular marker, EjPSY2A

中图分类号: 

  • S661.9