Table 1 Mid-parent heterosis and high-parent heterosis of root traits at tillering and heading stages

Tillering stage

Root length (cm)

31.96±3.21

33.34±1.77

25.58±2.63

15.88^**

4.32

Root dry weight (g)

1.45±0.04

3.11±0.13

2.24±0.01

68.56^*

38.84

Root-shoot ratio

0.20±0.02

0.25±0.00

0.19±0.01

28.21^*

25.00^*

Shoot dry weight (g)

7.45±0.81

12.48±0.39

12.07±0.85

27.85

3.36

Heading stage

Root length (cm)

48.63±2.73

64.45±3.07

37.5±2.45

49.66^**

32.53^**

Root dry weight (g)

6.44±0.52

11.27±0.34

3.06±0.22

137.26^**

75.00^**

Root-shoot ratio

0.15±0.00

0.18±0.02

0.13±0.00

28.57^*

20.00

Shoot dry weight (g)

43.21±1.34

61.86±0.64

24.13±5.15

92.29^*

43.16^*