TABLE 2

Description of each conserved block found in Arabidopsis

Conserved blockaNo. of times replicatedNo. of comparative markers in Arabidopsis (nonsyntenous)bNo. of comparative loci in B. napuscTotal cM coverage in B. napusLength of conserved block (Mb) in Arabidopsisd
C1A731 (1)88192.16.68
C1B722 (2)5464.75.32
C1C714 (1)2838.14.12
C1D410 (1)1824.12.49
C1E423 (2)42106.66.07
C2A512 (2)1942.18.71e
C2B611 (1)2434.153.42
C2C631 (3)651866.35
C3A631 (1)88244.69.27
C3Bf5–871324.751.66
C3Cf1–4684.353.07
C3D618 (1)3436.854.7
C4A6113125.657.09e
C4B68185.851.45
C4B635 (2)106244.858.96
C5A644 (3)142245.77.55
C5B6725551.98
C5C47 (2)1127.553.54
C5D616 (1)2645.052.42
C5E618 (3)5245.354.32
C5F56 (1)1413.151.99
Total(%)115–121368 (27)9061706.55 (86.7%)101.16 (85.3%)
  • a Conserved blocks are indicated in Figures 1 and 2. Those blocks that are present in at least three copies in each of the diploid Brassica genomes are indicated by italics.

  • b Number of comparative loci originating from the conserved block in Arabidopsis, which are mapped in a conserved region within the A and/or C genomes of B. napus. Loci within the conserved block that have not been mapped to a colinear position in B. napus are indicated in parentheses.

  • c Total number of mapped loci within B. napus that originate from the conserved block and are found in a colinear position.

  • d Physical length of the designated conserved block in Arabidopsis as shown in Figure 2. The complete block may not be represented in each of the duplicate copies.

  • e Blocks that include centromeric regions in Arabidopsis.

  • f Limited marker data in the region flanking the centromere on Arabidopsis chromosome 3 make it difficult to accurately identify these regions within the B. napus genome.