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Table 1 Number of Spelt 1, Spelt 52, and 5S ribosomal DNA (rDNA) clusters and percentage of major chromosomal rearrangements per diploid genome in studied genotypes

From: Transposable elements in a marginal plant population: temporal fluctuations provide new insights into genome evolution of wild diploid wheat

Genotype Spelt 1 Spelt 52 Inversions (paracentric and pericentric) Translocations B chromosomes 5S rDNA (chromosomes 5, 1, 6, B chromosomes)
  Sum Deletions terminal % Sum Deletions distal % Sum % Sum % Sum Sum %
Norm* 28 0 28 0 0 0 0 0 0 2 100
TS 84 26 7.14 18 35.71 2 7.14 0 0 0 2 100
G9 original 2 92.86 9 67.86 0 0 2 7.14 3 12 600
G9 S1 2 92.86 11 60.71 0 0 1 3.57 5 16 800
G9 S2 2 92.86 9 67.86 2 7.14 1 3.57 5 16 800
G13 original 2 92.86 12 57.14 1 3.57 2 7.14 0 2 100
G13 S1 1 96.43 12 57.14 0 0 2 7.14 0 2 100
G13 S2 2 92.86 6 78.57 2 7.14 2 7.14 0 2 100
G13 S3 1 96.43 6 82.14 2 7.14 2 7.14 0 6 300
G14 original 2 92.86 10 64.29 2 7.14 0 0 2 10 500
G14 S1 2 92.86 8 71.43 0 0 2 7.14 3 12 600
G14 S2 2 92.86 9 67.86 1 3.57 2 7.14 4 14 700
G14 S3 2 92.86 10 64.29 2 7.14 2 7.14 3 12 600
  1. *Norm = each chromosome in diploid genome (2n = 14, 28 chromosome arms) potentially carries 1 Spelt 1 and 1 Spelt 52 cluster in each arm (that is, 28 clusters in total of Spelt 1 equated to 100%, and 28 clusters of Spelt 52 equated to 100%). Deficiency of 1 Spelt 1 cluster (that is, single terminal deletion per 28 chromosome arms) equated to 3.57%, the same as deficiency of one Spelt 52 cluster (single distal deletion) equated to 3.57% per diploid genome.
  2. Inversions and translocations: single inversion or translocation per 28 chromosome arms equated to 3.57%. Markers for inversions: CCS-1, telomeric probe, Spelt 1, Spelt 52, and AT-positive heterochromatic bands.
  3. Normally chromosome 5 carries one 5S rDNA cluster (two clusters per diploid genome equated to 100%).
  4. Extranumerary B chromosomes regularly carry one 5S rDNA cluster in each arm, thus a single B chromosome adds two 5S rDNA clusters per diploid genome accordingly.
  5. Chromosomes 1 and 6 could carry additional 5S rDNA clusters in homozygote and heterozygote, consequently each among them could add a single additional 5S rDNA cluster, from one to four clusters per diploid genome.
  6. CCS-1 = cereal centromere-specific sequence 1; rDNA/RNA = ribosomal DNA/RNA.
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