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Evaluation of the Genetic Variability of Homoeologous Group 3 SSRS in Bread Wheat

机译：面包小麦同源3族SSRS的遗传变异性评估

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Thorough characterization of the genetic variability in bread wheat (Triticum aestivum L.) is important for a better improvement of this key crop and to increase cereal yield in the context of sustainable agriculture to face human needs in the next decades. To study the genetic variability of SSRs on wheat homoeologous group 3 chromosomes, we characterized 38 hexaploid and two tetraploid wheat lines using a set of 165 micro-satellites that we cytogenetically assigned to the 17 deletion bins for chromosomes group 3. A comparative analysis of the genetic variability through the PIC value study, allele numbers and SSR lengths indicated that there were no statistically significant differences (p > 0.05) between the three chromosomes of this homoeologous group despite the fact that SSRs from chromosome 3B exhibited slightly more alleles per locus compared to chromosomes 3A and 3D as well as slightly higher PIC values compared to chromosome 3D. However, there was a stronger correlation between SSR length and allele number on the short arms compared to the long aims and the correlation increased from the centromeres toward the telomeres. We did not find statistically significant differences in allele numbers and PIC values for SSRs located in more distal bins on 3A and 3B chromosomes. On the contrary, for chromosome 3D, we observed significant differences (p < 0.05) between the PIC values determined for SSRs assigned to deletion bin 3DL3-0.81-1.00 bin that is located distal compare to the more proximal region (C-3DL3-0.81). These results suggest that recombination which is higher in the telomeric regions does not contribute to increase a lot the variability of the SSRs.
机译：面包小麦（Triticum aestivum L.）的遗传变异性的全面表征对于更好地改善这一关键作物并在可持续农业满足未来几十年人类需求的情况下提高谷物产量至关重要。为了研究小麦同源第3组染色体上SSR的遗传变异性，我们使用一组165个微卫星对38个六倍体和两个四倍体小麦品系进行了特征分析，我们将它们通过细胞遗传学分配给染色体3组的17个删除区。通过PIC值研究，等位基因数量和SSR长度的遗传变异性表明，该同源组的三个染色体之间在统计学上无显着差异（p> 0.05），尽管来自3B染色体的SSR与每个基因座相比均显示出更多的等位基因与3D染色体相比，3A和3D染色体的PIC值略高。然而，与长远目标相比，短臂上的SSR长度与等位基因数目之间具有更强的相关性，并且相关性从着丝粒向端粒逐渐增加。我们没有发现SSR的等位基因数量和PIC值在统计学上有显着差异，这些SSR位于3A和3B染色体上的更多远端区域中。相反，对于3D染色体，我们观察到确定用于SSR的PIC值与分配给较近端区域（C-3DL3-0.81）的SSR的显着差异（p <0.05） ）。这些结果表明，在端粒区域中较高的重组不会大大增加SSR的变异性。

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  • 来源
    《Cytology and genetics》 |2009年第2期|99-111|共13页
  • 作者

    S. Chebotar; P. Sourdille; E. Paux; F. Balfourier; C. Feuillet; M. Bernard;

  • 作者单位

    South Plant Biotechnology Centre UAAN, Ovidiopolskaya dor. 3, 65036 Odessa, Ukraine;

    INRA UMR Genetic, Diversity and Ecophysiology of Cereals (GDEC), Domaine de Croueel, 234 Avenue du Brezet, 63100 Clermont-Ferrand Cedex 2, France;

    INRA UMR Genetic, Diversity and Ecophysiology of Cereals (GDEC), Domaine de Croueel, 234 Avenue du Brezet, 63100 Clermont-Ferrand Cedex 2, France;

    INRA UMR Genetic, Diversity and Ecophysiology of Cereals (GDEC), Domaine de Croueel, 234 Avenue du Brezet, 63100 Clermont-Ferrand Cedex 2, France;

    INRA UMR Genetic, Diversity and Ecophysiology of Cereals (GDEC), Domaine de Croueel, 234 Avenue du Brezet, 63100 Clermont-Ferrand Cedex 2, France;

    INRA UMR Genetic, Diversity and Ecophysiology of Cereals (GDEC), Domaine de Croueel, 234 Avenue du Brezet, 63100 Clermont-Ferrand Cedex 2, France;

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