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Table 4 Comparison of the degree of conservation between duplicated groups originating from different polyploidy events in B. rapa and B. oleracea

From: Genome-wide comparative analysis of the Brassica rapa gene space reveals genome shrinkage and differential loss of duplicated genes after whole genome triplication

 

Number of groups produced

Number of genes*

Degree of conservation

Duplication event

 

Total

Unpaired

Conserved

(%)†

B. rapa

     

   3R event

33

2,017

1,623

394

19.5

   4R event

18 (3)

651 (112)

367 (58)

284 (54)

43.6 (48.2)

   Segmental duplication

1 (1)

24 (28)

4 (0)

20 (28)

83.3 (100)

B. oleracea ‡

     

   3R event

9

310

196

114

36.8

   4R event

6

217

81

136

62.7

  1. Data in parentheses are those from the Flowering Locus C (FLC) regions [20]. *Tandem duplicated genes were considered to be a single homolog. †The degree of conservation was calculated by dividing the number of conserved genes by the total number of genes. ‡Information about the Bo genome was obtained from the report of Town et al. [19].