基于三七全基因组SSR标记的开发与鉴定
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1.云南农业大学西南中药材种质创新与利用国家地方联合工程研究中心;2.云南省农业科学院经济作物研究所;3.文山学院;4.文山苗乡三七科技有限公司

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Development and Identification of SSR Molecular Markers Based on the Whole Genome of Panax notoginseng
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1.National Local Joint Engineering Research Center on Germplasms Utilization Innovation of Chinese Materials in Southwest,Yunnan Agricultural University;2.Institute of Cash Crops,Yunnan Academy of Agricultural Sciences,Yunnan Agricultural University,Kunming, China;3.Wenshan University;4.Miaoxiang Panax notoginseng Industrial Corporation Ltd of Wenshan City

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    三七为人参属多年生草本植物,生长和繁育周期长,群体间的遗传多样性低,但群体内单株间表型变异大。因此,基于三七全基因组水平开发分子标记,有助于三七遗传多样性评价和品种选育。本研究基于三七基因组信息,使用 MISA 软件进行全基因组水平SSR 标记开发,鉴定到255,239个SSR标记,共筛选出24对多态性引物。根据三七中5种皂苷含量构建了11份(SL1-SL11)集团群体,通过已获得SSR标记进行遗传分析。结果表明,11份集团群体杂合度较高(0.4583-0.6042),遗传分化程度低(Fst=0.0447),且具有较高基因流(Nm=11.6189)。性状调查结果表明,11份集团群体间总皂苷含量间无显著性差异,群体SL8单体皂苷NG-Rg1含量显著高于其它群体。本研究基于三七全基因组信息开发的SSR标记,以及通过单体皂苷含量选出的材料,有助于利用分子标记技术开展三七高皂苷集团群体构建和新品种选育。

    Abstract:

    Panax notoginseng, a perennial herb belonging to the Panax genus, has a long growth and breeding cycle. The populations have low genetic diversity among populations but significant phenotypic variation within individuals of the population. Therefore, P. notoginseng is beneficial for the assessment of genetic diversity and the breeding of varieties by the development of molecular markers base on the whole-genome.In this study, simple-sequence repeat (SSR) markers were generated from the whole-genome and were applied to assess the genetic diversity among 11 populations (SL1-SL11) constructed based on saponin content. A total of 255,239 SSR markers were identified, and ultimately, 24 pairs of polymorphic primers were selected for genetic analysis. The results indicated that the heterozygosity of the 11 populations was similar (0.4583-0.6042), with low genetic differentiation (Fst =0.0447) and high gene flow (Nm = 11.6189). Total saponin content investigation revealed no difference among populations, but SL8 exhibited significantly higher than other populations in NG-Rg1. The trait association analysis indicated that SSR2 was associated with the content of G-Rg1, G-Re, and total saponin; SSR20 was associated with the content of NG-R1 and G-Rb1 content; SSR21 was associated with G-Rg1; and SSR22 was associated with NG-R1. In this study, SSR markers analysis were developed based on whole-genome information of P. notoginseng, which was helpful for population construction and variety breeding using molecular marker technology.

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  • 收稿日期:2024-01-31
  • 最后修改日期:2024-06-01
  • 录用日期:2024-07-15
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