Isolation of a novel mutant gene for soil-surface rooting in rice (Oryza sativa L.)

Rice

Table 1 Segregation of gravitropic responses of primary roots and the ratio of soil-surface roots to total roots in the F ₂ population

Plants	Number of plants	Soil-surface root ratio (%)*
Plants	Number of plants	Mean ± S.D.	Minimum	Maximum
Mutant line	9	64.4 ± 17.3	26.5	82.7
Gravity-insensitive F₂ plants	25	69.1 ± 10.1	52.6	85.0
Gravity-sensitive F₂ plants	60	2.8 ± 3.0	0.0	11.4
Nipponbare	9	5.1 ± 4.4	0.0	14.1

*The soil-surface rooting ratio was calculated as (the number of primary roots emerged at x < 0° / the total number of primary roots) × 100.