“李三顶”是保山地区农科所,施甸县农科所和种籽公司先后用地方良种“李山黄马牙”(群改)作母本,自交系“330”作父本配制而成的顶交种。1984年开始推广0.19万亩,1985年2万亩,1986年2.5万亩,1987年3万亩。经过5年种植表明:“李三顶”与地方品种比较,株型紧凑,茎秆偏高偏硬,品质好, “Li San Ding” is the Baoshan Regional Agricultural Science Institute, Shidian County Agricultural Science Institute and the seed company successively with the local thoroughbred “Li Shan Huangmaya” (group change) as the female parent, inbred “330” as the father Formulated from the top cross species. In 1984, it started to promote 19,000 mu, 20,000 mu in 1985, 25,000 mu in 1986 and 30,000 mu in 1987. After 5 years of planting shows that: “Li Sanding” compared with the local varieties, plant compact, high stalks and harder, good quality,