Longdao No.7(Ha 02-220) was selected from variated plant of rice Wuyoudao No.1.Its number of leaves on main stem was twelve,maturation period was 137 d,active accumulated temperature was 2 500 ℃,and all kinds of integrated resistance were obviously strong.Average yield of two years regional trial and one year production trial were 7 585.2 kg/hm~2 and 8 100.2 kg/hm~2 respectively,and average increased yield were 6.6% and 10.1% compared with control Kendao No.10,respectively.All kinds of items reached state high quality rice standard and examined and approved in 2005.