采用属Reid自交系和属Tuxpeno自交系形成墨瑞C₀以及用属Suwan自交系、Mo17和78599形成苏兰C₀。两个群体在4次遗传平衡后按半同胞相互轮回选择后分别形成改良一轮的墨瑞C₁和苏兰C₁。经多点产量比较,墨瑞C₁×苏兰C₁比墨瑞C₀×苏兰C₀的产量提高7.84%,达到极显著水平,而两个群体本身的产量变化不显著。群体间的平均杂种优势也从改良前的9.86%提高到改良后的16.29%。根据SSR标记计算,相互轮回选择对群体间的遗传距离略有提高。

Two populations of Tuxpeno-Reid and Suwan-Lancaster were developed from five Reid and four Tuxpeno inbreds, six Suwan inbreds, Mo17 and 78599 by four times random mating respectively. After one cycle of reciprocal recurrent selection, mean yield of Tuxpeno-Reid(C₀)×Suwan-Lancaster(C₀) was increased highly significant from 8.064 kg per plot to 8.696 kg of Tuxpeno-Reid(C₁)×Suwan-Lancaster(C₁), and mid-parent heterosis increased from 9.86% to 16.29%, and genetic distance by SSR between two populations increased slightly.

贵州省科技农业攻关[黔科合NY字(2008)3002号]