Genetic diversity and molecular identity of <i>Prunus mume</i> with both ornamental and edible values based on fluorescence-labeled simple sequence repeat (SSR) markers.

Zixu WANG; Dan ZHOU; Yanbei ZHAO; Yuhang TONG; Weijun ZHENG; Qingwei LI

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Genetic diversity and molecular identity of Prunus mume with both ornamental and edible values based on fluorescence-labeled simple sequence repeat (SSR) markers.

Author: Zixu WANG ¹ ; Dan ZHOU ¹ ; Yanbei ZHAO ¹ ; Yuhang TONG ² ; Weijun ZHENG ² ; Qingwei LI ¹
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1. National Key Laboratory for Efficient Production of Forest Resources, School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China.
2. Beijing Greenland Maintenance and Management Centre, Beijing 102211, China.
Publication Type:Journal Article
Keywords: Prunus mume; fluorescence-labeled simple sequence repeat (SSR) molecular marker; genetic diversity; molecular identity; with both ornamental and edible values
MeSH: Prunus/classification*; Microsatellite Repeats/genetics*; Genetic Variation; China; Phylogeny; Polymorphism, Genetic; DNA, Plant/genetics*; Alleles
From: Chinese Journal of Biotechnology 2025;41(2):639-656
CountryChina
Language:Chinese
Abstract: We studied the genetic diversity and established the DNA molecular identify for Prunus mume with both ornamental and edible values, aiming to collect, identify, evaluate, and breed new varities of this plant and promote the upgrading of the P. mume industry chain in northern China. We employed 13 pairs of primers with good polymorphism, clear bands, and good repeatability to analyze the genetic diversity and establish the molecular identify of 68 germplasm accessions of P. mume with both ornamental and edible values from Xingtai, Hebei Province. We then employed the unweighted pair-group method with arithmetic means (UPGMA) to perform the cluster analysis based on genetic distance. After that, we analyzed the genetic structure of the 68 germplasm accessions based on a Bayesian model. The 13 pairs of SSR primers amplified a total of 124 alleles from 68 P. mume germplasm accessions, with the mean number of alleles (Na) of 9.538 5, the minor allele frequency (MAF) of 0.369 3, the mean number of effective alleles (Ne) of 4.483 5, and the mean Shannon genetic diversity index (I) of 1.712 4. The mean Nei's gene diversity index (H) of 0.763 7, the mean observed heterozygosity (Ho) of 0.719 5, the mean expected heterozygosity (He) of 0.769 3, the mean polymorphism information content (PIC) of 0.733 6, and the mean genetic similarity (GS) of 0.772 9 suggested that there were significant genetic differences and rich genetic diversity among the studied P. mume germplasm accessions. The cluster analysis revealed that the 68 accessions were classified into three groups, with the mean genetic distance of 0.622 6. The population structure analysis classified the germplasm accessions into two populations. According to the PIC of primers, we selected primers for combination and constructed the combination with the fewest primers required for germplasm differentiation of P. mume with both ornamental and edible values. This study provides a theoretical basis for the innovation and industrial upgrading of P. mume with both ornamental and edible values in gardening and the improvement of breeding efficiency.