浙江农业学报 ›› 2022, Vol. 34 ›› Issue (10): 2209-2219.DOI: 10.3969/j.issn.1004-1524.2022.10.15

• 园艺科学 • 上一篇    下一篇

广丰千金薯和铁棍山药脱毒微型块茎的转录组分析

尹明华1,2,3,4(), 白丽1, 陈舒敏1, 程佳慧1, 冯丽文1   

  1. 1.上饶师范学院 生命科学学院,江西 上饶 334001
    2.上饶农业技术创新研究院,江西 上饶 334001
    3.上饶市药食同源植物资源保护与利用重点实验室,江西 上饶 334001
    4.上饶市薯芋类作物种质保存与利用重点实验室,江西 上饶 334001
  • 收稿日期:2022-01-18 出版日期:2022-10-25 发布日期:2022-10-26
  • 作者简介:尹明华(1973—),女,江西永新人,硕士,教授,主要从事植物生物技术研究。E-mail: yinminghua04@163.com
  • 基金资助:
    2021年度江西省教育厅科学技术研究项目(GJJ211729);上饶市科技局平台载体建设项目(2020I001)

Transcriptome analysis of virus-free microtubers of Dioscorea polystachya Turczaninow. cv. Guangfeng Qianjin and Dioscorea polystachya Turczaninow. cv. Tiegun

YIN Minghua1,2,3,4(), BAI Li1, CHEN Shumin1, CHENG Jiahui1, FENG Liwen1   

  1. 1. College of Life Sciences, Shangrao Normal University, Shangrao 334001, Jiangxi, China
    2. Shangrao Agricultural Technology Innovation Research Institute, Shangrao 334001, Jiangxi, China
    3. Key Laboratory of Protection and Utilization of Medicinal and Edible Plant Resources in Shangrao City, Shangrao 334001, Jiangxi, China
    4. Shangrao Key Laboratory of Germplasm Conservation and Utilization of Potato and Taro Crops, Shangrao 334001, Jiangxi, China
  • Received:2022-01-18 Online:2022-10-25 Published:2022-10-26

摘要:

为探究广丰千金薯和铁棍山药在分子水平的差异,以广丰千金薯(QJS)和铁棍山药(TGSY)试管苗的微型块茎为试验材料进行转录组分析。结果表明:QJS组和TGSY组样本间相关系数为0.42。QJS组和TGSY组表达量FPKM的对数值在0~1.5,表达量密度在0~1.0。与TGSY组相比,QJS组有4 765个基因下调,有5 112个基因上调。QJS组和TGSY组表达的共有基因有25 207个,QJS组单独表达的基因有5 261个,TGSY组单独表达的基因有3 571个。QJS组和TGSY组共发现611 498个单核苷酸多态性(single nucleotide polymorphism,SNP)位点和12 056个简单重复序列(simple sequence repeats,SSR)。与TGSY组相比,QJS组的淀粉合成酶3、α-淀粉酶3、β-淀粉酶、类黄酮3'-单加氧酶、类黄酮3'-羟化酶、花青素合酶等基因上调,而颗粒结合淀粉合酶2、蔗糖合酶1、扩展蛋白2和苯丙氨酸解氨酶等基因下调。这可能是广丰千金薯微型块茎肉质绵密粉嫩、软糯爽口、胁迫防御、食后易胀的内在原因。结果可以为广丰千金薯的品种鉴定和分子育种提供参考。

关键词: 广丰千金薯, 铁棍山药, 脱毒, 微型块茎, 转录组分析

Abstract:

In order to explore the differences between Dioscorea polystachya Turczaninow. cv. Guangfeng Qianjin (QJS) and D. polystachya Turczaninow. cv. Tiegun (TGSY) at molecular level, the transcriptome analysis was carried out on the microtubers of plantlets of QJS and TGSY. The results showed that correlation coefficient between QJS group and TGSY group was 0.42. The logarithm of expression FPKM in QJS group and TGSY group was between 0-1.5 and the expression density was between 0-1.0. Compared with TGSY group, 4 765 genes were down regulated and 5 112 genes were up regulated in QJS group. The number of common genes expressed in QJS group and TGSY group was 25 207, the number of genes expressed alone in QJS group was 5 261, and the number of genes expressed alone in TGSY group was 3 571. A total of 611 498 single nucleotide polymorphism (SNP) loci and 12 056 simple sequence repeats (SSRs) were found in QJS group and TGSY group. Compared with TGSY group, genes of starch synthase 3, alpha-amylase 3, beta-amylase, flavonoid 3'-monooxygenas, flavonoid 3'-hydroxylas and anthocyanin synthase were up-regulated, while genes of granule-bound starch synthase, sucrose synthase 1, expansin 2 and phenylalanine ammonia lyase were down regulated. This might be the internal reason why D. polystachya Turczaninow. cv. Guangfeng Qianjin microtuber was tender, soft, waxy and refreshing, stress defense and easy to swell after eating. The results of this study would provide reference for variety identification and molecular breeding of D. polystachya Turczaninow. cv. Guangfeng Qianjin.

Key words: D. polystachya Turczaninow. cv. Guangfeng Qianjin, D. polystachya Turczaninow. cv. Tiegun, virus-free, microtuber, transcriptome analysis

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