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Table 2 Characteristics of pachytene chromosome 4 and 7 of R. wichurana

From: High resolution physical mapping of single gene fragments on pachytene chromosome 4 and 7 of Rosa

Chr. Nr. Chromosome length (μm) Short arm (μm) Long arm (μm) Short arm heterochromatin (%)a Long arm heterochromatin (%)b Total heterochromatin (%)c Centromere index NOR nd
4 45.6 ± 5.4 11.4 ± 1.4 34.0 ± 4.0 62.0 ± 6.0 21.0 ± 4.5 31.0 ± 4.0 25.0 ± 0.5   7
7 38.4 ± 4.2 4.0 ± 0.6 33.3 ± 3.5 88.0 ± 6.7 16.8 ± 4.4 24.3 ± 2.3 10.3 ± 0.8 + 9
  1. a– calculated by the formula: length of heterochromatin of the short arm × 100%/total length of the short arm
  2. b– calculated by the formula: length of heterochromatin of the long arm × 100%/total length of the long arm
  3. c– calculated by the formula: (length of heterochromatin of the short arm + length of heterochromatin of the long arm) × 100 %/total length of the chromosome
  4. d– Number of pachytenes used in the measurements of chromosome lengths and calculation of % heterochromatin