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<p>Understanding the phylogenetic relationships <i>Aegilops</i> and <i>Triticum</i> genera is valuable for wheat breeding efforts in addition to plant taxonomy. In the present study, phylogenetic relationships of 40 accessions belonging to three species of <i>Triticum</i> and six species of <i>Aegilops</i> were investigated by 226 wheat SSR markers. Fifty-eight markers (25.6%) could amplify microsatellite loci in the wild <i>Triticum</i> and <i>Aegilops</i> species and 50 (22.5%) were polymorphic. In total, 205 alleles with a mean of 4.1 alleles/locus, and a mean polymorphic information content (PIC) of 0.48 were amplified. The mean number of alleles in A, B, and D genomes was 4.19, 4.08, and 4.82, respectively. The correlation between the number of alleles and PIC in all genomes was significant (0.90, 0.83, and 0.88 for A, B, and D genomes, respectively). The homologous chromosome groups 2 and 1 showed the highest and lowest genetic diversity, respectively as revealed by allele number and PIC. Model and distance-based clustering algorithms and principal coordinate analysis assigned the <i>Triticum</i> and <i>Aegilops</i> species into separate groups. In each genus, species harboring A, B, and D genomes were differentially grouped and accessions with the A and D genomes showed abundant genetic diversity. Within each group, the accessions were further separated based on their ploidy level. This grouping was consistent with their genomes and taxonomic classification. The results revealed that wheat SSR markers are effective tools for providing an accurate picture of the genetic relationships among <i>Triticum</i> and <i>Aegilops</i> species, which is important for the phylogenetic analysis and breeding programs.</p>

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Re-construction of Triticum and Aegilops phylogenetic relationships based on wheat microsatellite markers

  • 期刊论文

  • 发表日期：

    2025年3月14日

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  • Ahmad Ahmadi Laki,
  • Seyyed Abolghasem Mohammadi,
  • Mohammad Moghaddam Vahed

摘要

Understanding the phylogenetic relationships Aegilops and Triticum genera is valuable for wheat breeding efforts in addition to plant taxonomy. In the present study, phylogenetic relationships of 40 accessions belonging to three species of Triticum and six species of Aegilops were investigated by 226 wheat SSR markers. Fifty-eight markers (25.6%) could amplify microsatellite loci in the wild Triticum and Aegilops species and 50 (22.5%) were polymorphic. In total, 205 alleles with a mean of 4.1 alleles/locus, and a mean polymorphic information content (PIC) of 0.48 were amplified. The mean number of alleles in A, B, and D genomes was 4.19, 4.08, and 4.82, respectively. The correlation between the number of alleles and PIC in all genomes was significant (0.90, 0.83, and 0.88 for A, B, and D genomes, respectively). The homologous chromosome groups 2 and 1 showed the highest and lowest genetic diversity, respectively as revealed by allele number and PIC. Model and distance-based clustering algorithms and principal coordinate analysis assigned the Triticum and Aegilops species into separate groups. In each genus, species harboring A, B, and D genomes were differentially grouped and accessions with the A and D genomes showed abundant genetic diversity. Within each group, the accessions were further separated based on their ploidy level. This grouping was consistent with their genomes and taxonomic classification. The results revealed that wheat SSR markers are effective tools for providing an accurate picture of the genetic relationships among Triticum and Aegilops species, which is important for the phylogenetic analysis and breeding programs.