Q5 is a Chinese purebred rice variety, selected and purified by ThaiBinh Seed Joint Stock Corporation.
Growing time: in the North of Viet Nam: in Spring crop from 125 days to 135 days, in Summer crop from 105 days to 110 days; in South Central and Central Highlands: in Winter-Spring crop from 110 days to 115 days, in Summer-Autumn crop from 100 days to 105 days.
Height: from 105 cm to 110 cm, moderately-tillering, strong stem, resistance to shedding is quite good, concentrated flowering; gourd shape seeds, arranged closely; 1000 seeds's net weight is about 25 grams to 26 grams.
Slightly infected by sheath blight disease and by leaf blight bacteria, moderately infected by rice blast bacteria.
Average yield reaches from 65 quintals to 70 quintals/ha, can reach from 75 quintals to 80 quintals/ha with good intensive farming conditions.
Amylose content reaches 27%, medium rice's quality.