摘要
中国玉米Lancaster杂种优势群中LancasterSurecrop(LSC)种质主要来自Mo17和Oh4 3,且受到C10 3和Oh4 0B的严重限制。该群大多数自交系的LSC种质含量≤ 5 0 % ;同时存在 2 0多种非LSC种质 ,它们是Lancaster杂种优势群具有丰富遗传多样性的重要原因。Mo17亚群的大多数自交系含有 2 5 %～ 5 0 %的LSC种质 ,12 .5 %～ 2 5 %的ReidYellowDent(RYD)种质和 12 .5 %～ 2 5 %的IowaGoldmine种质 ,其比例为 2∶1∶1;而自 330亚群的大多数自交系含有 12 .5 %～2 5 %的LSC种质 ,6 .2 5 %～ 12 .5 %的RYD种质 ,6 .2 5 %～ 12 .5 %的Minnesota # 13种质和 2 5 %～ 5 0 %的Creole种质 ,其比例为 2∶1∶1∶4。可见 ,Lancaster杂种优势群自交系的种质基础发生了惊人的变化 ,Lancaster杂种优势群己脱离了纯LancasterSurecrop种质。
The Lancaster Surecrop(LSC) germplasm in inbreds of the Lancaster heterotic group of maize in China is mainly provided by Mo17 and Oh43, furthermore the source of LSC germplasm is severely restricted in two inbreds C103, and Oh40B. The contents of LSC germplasm are 50% or less in inbreds of the group, with the existence of more than 20 non LSC germplasms which results in abundant genetic diversity among inbreds of the group. Most inbreds of Mo17 subgroup contain 25%-50% LSC, 12.5%-25% Reid Yellow Dent(RYD)and 12.5%-25% Iowa Goldmine germplasm in the ratio of 2∶1∶1, and most inbreds of Zi 330 subgroup contain 12.5%-25% LSC, 6.25%-12.5% RYD, 6.25%-12.5% Minnesota #13 and 25%-50% Creole germplasm in the ratio of 2∶1∶1∶4. It indicats that the germplasm base of inbreds of the Lancaster heterotic group has changed greatly from the original Lancaster Surecrop germplasm.
出处
《中国农业科学》
CAS
CSCD
北大核心
2002年第7期750-757,共8页
Scientia Agricultura Sinica
基金
吉林省科技厅资助项目
