生物技术通报

• 技术与方法 •    下一篇

29份苏丹草种质材料的SSR指纹图谱构建及分析

杨东升1(), 牛誉驰1, 卢倩倩1, 樊敬镛1, 刘雨雷1, 刘权1, 郭利平2, 郝水源1()   

  1. 1.河套学院 硬质小麦技术创新中心 河套地区绿色农产品安全生产与预警控制实验室,巴彦淖尔 015000
    2.内蒙古自治区林业和草原综合保障中心,呼和浩特 010020
  • 收稿日期:2025-09-01 出版日期:2026-03-09
  • 通讯作者: 郝水源,男,博士,教授,研究方向 :饲用作物遗传育种;E-mail: haoshuiyuan@126.com
  • 作者简介:杨东升,男,博士,副教授,研究方向 :饲用作物遗传育种;E-mail: yangdongsheng007@163.com
  • 基金资助:
    科技“突围”工程重点项目暨巴彦淖尔国家农高区重大科技项目(2025KJTW04);内蒙古自治区自然科学基金青年基金项目(2024QN03056);内蒙古自治区“科技兴蒙”行动重点专项(NMKJXM202201)

Construction and Analysis of SSR Fingerprint Construction for 29Sorghum sudanense Germplasm Materials

YANG Dong-sheng1(), NIU Yu-chi1, LU Qian-qian1, FAN Jing-yong1, LIU Yu-lei1, LIU Quan1, GUO Li-ping2, HAO Shui-yuan1()   

  1. 1.Hetao College, Technological Innovation Center for Durum Wheat, Laboratory of the Green Agricultural Product Safety Production and Early Warning Control in Hetao Area, Bayannur 015000
    2.Forestry and Grassland Comprehensive Security Center of Inner Mongolia Autonomous Region, Hohhot 010020
  • Received:2025-09-01 Published:2026-03-09

摘要:

目的 为高效利用苏丹草的种质资源,明确苏丹草种质间的亲缘关系。 方法 从56对SSR引物中筛选出21对多态性引物,采用聚丙烯酰胺凝胶电泳技术对29份苏丹草种质材料进行多态性检测,基于分子标记位点进行遗传多样性分析和聚类分析,利用数字赋值法构建指纹图谱。 结果 共检测到258条多态性条带,每对引物组合可检测条带6‒29条,多态性比率为85.15%。Shannon’s信息指数为0.509 8‒0.692 6,平均为0.659 7。多态性信息量为0.712 2‒0.836 4,平均为0.775 4。Nei’s遗传多样性指数为0.328 2‒0.499 4,平均为0.467 5。欧式聚类分析显示,在遗传距离为22.5时,可将29份苏丹草种质聚为4大类群,多数以颜色和穗型聚类。构建了一张包含20个标记位点的苏丹草指纹图谱,可用于种质材料的鉴定。 结论 29份苏丹草种质材料的遗传多样性相对较高。利用SSR分子标记构建苏丹草指纹图谱操作简便可行。

关键词: 苏丹草, SSR分子标记, 遗传多样性分析, 聚类分析, 指纹图谱

Abstract:

Objective This study aims to efficiently utilize the Sorghum sudanense germplasm resources, and clarify the genetic relationships among the germplasms. Method Twenty-one pairs of highly polymorphic primers with clear electrophoresis bands were screened from 56 pairs of SSR primers. Polyacrylamide gel electrophoresis technology was used to detect the polymorphism of 29 S. sudanense germplasm materials. Genetic diversity analysis and cluster analysis were conducted based on molecular marker sites, and a fingerprint was constructed using the digital assignment method. Result A total of 258 polymorphic bands was detected, with each primer combination detected 6 to 29 bands, and the polymorphism ratio was 85.15%. Shannon’s information index ranged from 0.509 8 to 0.692 6, with an average of 0.659 7. The polymorphism information content was between 0.712 2 and 0.836 4, with an average of 0.775 4. Nei’s genetic diversity index ranged from 0.328 2 to 0.499 4, with an average of 0.467 5. European clustering analysis showed that when the genetic distance was 22.5, and the 29 germplasms could be clustered into 4 major groups, and most of them were clustered by color and panicle shape. A fingerprint of S. sudanense containing 20 SSR marker loci was constructed, which can be used for the identification of germplasm materials. Conclusion The genetic diversity among 29 germplasm materials is relatively high. The construction of a fingerprint for S. sudanense using SSR molecular markers is simple and feasible to operate.

Key words: Sorghum sudanense, SSR molecular marker, genetic diversity analysis, clustering analysis, fingerprint