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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (6): 1539-1552.doi: 10.16420/j.issn.0513-353x.2024-0433

• Genetic & Breeding?Germplasm Resources?Molecular Biology • Previous Articles     Next Articles

Genetic Diversity Analysis and Fingerprint Construction of Rosa Germplasm Resources Based on SSR Marker

SUN Pei1,2,3(), ZHANG Hong1,2,3, YANG Yuan1,2,4, WANG Hua1,2,3, LI Maofu1,2,3, KANG Yanhui1,2,3, SUN Xiangyi1,2,3, JIN Wanmei1,2,3,*   

  1. 1 Institute of Forestry and Pomology,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100093,China
    2 Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(North China),Ministry of Agriculture and Rural Affairs,Beijing 100093,China
    3 Beijing Engineering Research Center of Functional Floriculture,Beijing 100093,China
    4 Beijing Engineering Research Center for Deciduous Fruit Trees,Beijing 100093,China
  • Received:2024-12-19 Revised:2025-02-28 Online:2025-06-20 Published:2025-06-20
  • Contact: JIN Wanmei

Abstract:

15 SSR markers were adopted to analyze the genetic diversity and 3 core SSR markers established fingerprint of 80 rose germplasm resources. The ploidy level of some germplasm resources were also detected. The results showed that a total of 425 alleles were amplified by 15 SSR markers,with an average of 28.33 alleles per pair of primers and the number of alleles range from 7-64. The average number Polymorphic information content(PIC)was 83.52%,and the average power of discrimination(PD)was 84.84%. These parameters manifested that the tested resources got great genetic diversity. The similarity coefficient ranged from 0.27 to 0.67 among the 80 germplasm resources. Unweighted pair-group method with arithmetic means(UPGMA)analysis clustered all germplasm resources into three group at the similarity coefficient 0.28,and further divided the rose into two subgroups as Rosa hybrida and Chinese old rose when the similarity coefficient was 0.30. Three pairs of core SSR markers were selected to construct fingerprint. A certain correlation between the ploidy level and the number of amplified fragments for germplasm resources was identified,which means the number of amplified fragments could assist ploidy detection to some extent.

Key words: Rosa, SSR, genetic diversity, cluster analysis, fingerprint, ploidy test