加拿大玉米自交系改良黑龙江省杂交种的潜势分析

Genetic Potentiality of Canada Inbred Lines to Improve Heilongjiang Province Elite Hybrids

为准确把握及评价引入加拿大同纬度外源自交系对黑龙江省自交系的改良效应,为玉米育种工作提供宏观指导,应用Dudley方法对8个外引加拿大自交系的引入效应进行了分析。结果表明:在综合表现方面认为C06为最优,C05次之。若将C06应用到改良单交种的育种程序中有可能在各个性状上取得较好的效果。C05的最高改良值多集中于植株性状上,应用其改良单交种的植株性状可能取得进展。自交系C01、C02、C03综合表现一般,但C03表现为在改良每穗行数性状上优于其它自交系。C07和C08虽然在其它性状上表现弱于其它自交系,但用于改良单交种的早熟性有望取得较好的效果。自交系C04在引入群体中综合表现最低,且未表现出在所调查性状中有突出的改良优势,可以将其淘汰。

The improved effect of 8 Canada introduced maize inbred lines by NCII design was analyzed to esti- mate the improved effect of introduced Canada maize inbred lines which in the same latitude with Heilongjiang province,and to provide macro guidance for maize breeding. The results showed that inbred line C06 was con- sidered as the best at the aspect of comprehensive performance,C05 was second. The better effect would be ob- tained by utilizing C06 in a breeding process of improved elite single-cross in many traits. C05 had the highest improved value on plant type traits,and progress would be obtained by utilizing it to improve the plant type traits. The comprehensive performance of inbred lines C01, C02, C03 were in an average, but C03 performed best than any other inbred lines at the aspect of improving kernel rows. The better effect would be obtained by utilizing C07 and C08 to improve the earliness of elite single-cross,though the two inbred lines performed poor than other lines at other traits. Inbred lines C04 was the worst at the aspect of comprehensive performance,and had no prominent improved superiority at other traits, it could be eliminated.