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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