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材料和方法1.杂种优势分析 1978年5月10日在我院北圃场播种中杂1号粳稻,BoroⅡ—京引47A/300号,保持系京引66、京引47和对照种喜峰,6月23日插秧,插植规格为(6+8)÷2×4(寸),每穴1苗,每亩2.1万基本苗。试验小区面积30平方米,随机区组排列,重复四次。成熟时,田间取样,单收,单打,称重。对株高、穗长、一株
Materials and Methods 1. Heterosis Analysis On May 10, 1978, Zhongza 1 japonica rice, BoroⅡ-Jingyou 47A / 300 was sown in North Garden of our hospital, and the maintainer lines of Jingyin 66, Jingyou 47 and the control variety Xifeng , June 23 planting, planting specifications (6 +8) ÷ 2 × 4 (inch), per hole 1 seedlings, 21000 basic acres per acre. Experimental area of 30 square meters, randomized block arrangement, repeated four times. Mature, field sampling, single income, singles, weighing. On the plant height, spike length, a