Table 1 Cross combination and cross ability of interspecific hybridization between Brassica rapa (AA) parental line T19 and Brassica oleracea (CC) parental lines ECD11 and JL04.

From: Resynthesizing Brassica napus with race specific resistance genes and race non-specific QTLs to multiple races of Plasmodiophora brassicae

Cross combination (♀ × ♂)

No. of parental line used

Flowers pollinated (a)

Ovary set (rate, %)

F1 (AC) germinated

F1 (AC) survived in soil

F1-hybrid (AACC) produced seeds (b)

Cross ability (b/a, %)

T19 × ECD11

T19: 6 plants

ECD11: 3 plants

221

137 (61.9)

13

10

4

1.8

ECD11 × T19

T19: 6 plants

ECD11: 3 plants

57

26 (45.6)

3

1

0

0.0

T19 × JL04

T19: 10 plants

JL04: 6 plants

269

230 (85.5)

35

34

4

1.5

Total

 

547

393 (78.1)

51

45

8

1.5

  1. a = number of flowers pollinated in each cross combination, b = number of hybrid plants successfully produced in each cross combination, b/a × 100% = cross ability of each cross combination in percentage.
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