Cross

Ratio :

Scale

Number of hybrids

Reference

B. napus x B. rapa

9:1

Field trial with 58 plants m^-2

7.9 seeds per plant ^t,1

Jørgensen et al. 1997

B. napus x B. adpressa

Approx. 1:1

1 :1

1 :4

1 :1

25 x 10m^-2 plots

4 x 9m² plots

6 x 9m² plots

1 300m² field with 50 plants m^-2

512 seeds m^{-2 c}

1.5 seeds per plant ^c

26 seeds per plant ^c

0.4 seeds per plant ^c

Eber et al. 1994

Lefol et al. 1996a

B. napus x R. raphanistrum

Approx. 1:1

excess

1 :1

1 :2

6 x 10m² plots

5 x blocks of 1:1 with 6m border of

3 x 9m² plots

3 x 9m² plots

3,734 seeds m^{-2 c}

5.3 - 556.5 seeds per plant ^t,2

37 per plant

8 per plant

Eber et al. 1994

Baranger et al. 1995

Darmency et al. 1998

B. napus x S. arvensis

2 :1

1 :1

6.2:1

1 :1.9

1 :2.1

5 x plots of 24 and 12

3 x plots of 18 and 18

3 x plots of 62 and 10

3 x plots of 10 and 19

2 x plots of 11 and 23

0

0

0

0

6

Lefol et al. 1996b