Biotechnology Bulletin ›› 2026, Vol. 42 ›› Issue (6): 198-207.doi: 10.13560/j.cnki.biotech.bull.1985.2025-0933

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Construction and Analysis of SSR Fingerprint 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 Online:2026-06-26 Published:2026-07-11
  • Contact: HAO Shui-yuan E-mail:yangdongsheng007@163.com;haoshuiyuan@126.com

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 were 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 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