摘要
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 Tux- peno inbreds, six Suwan inbreds, Mo17 and 78599 by four times random mating respectively. After one cycle of recip- rocal recurrent selection, mean yield of Tuxpeno-Reid(Co) × Suwan-Lancaster(Co) 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.
出处
《玉米科学》
CAS
CSCD
北大核心
2013年第4期1-5,10,共6页
Journal of Maize Sciences
基金
贵州省科技农业攻关[黔科合NY字(2008)3002号]
关键词
玉米
轮回选择
杂种优势
Maize
Recurrent selection
Heterosis