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杂交水稻威优33,是福建省农科院稻麦研究所于一九七八年,以威20不育系与早熟恢复系3533(株系编号)测配育成的杂优组合。一九七九年该所小区试验,表现分蘖力强,穗大粒多,每穗100～110粒,每亩有效穗25～26万,结实率84.9％,千粒重27.2克。早季全生育期125天,比四优2号早熟10天左右。一九八○年管
Weiyou 33, a hybrid rice, is a hybrid combination of the Institute of Rice and Wheat of Fujian Academy of Agricultural Sciences, tested and fertilized by a combination of Granville 20 CMS and 3533 (line number). In 1979, the plot of the district showed strong tillering ability with large spikelets per ear ranging from 100 to 110 grains per spike, 25 to 260,000 effective spikes per mu, seed setting rate of 84.9% and grain weight of 27.2 grams. Early-season full-term 125 days, compared with Siyou 2 precocious 10 days or so. 1980 tube