外来热带、亚热带玉米自交系与云南地方玉米自交系的配合力研究

Study on Combining Ability Between Exotic Tropical, Subtropical Maize Inbred Lines and Yunnan Local Maize Inbred Lines

以5个外引热带、亚热带玉米自交系和5个云南地方玉米自交系为材料,按Griffing双列杂交方法IV组配成45个组合,在云南省3种不同生态条件下进行鉴定,研究了8个性状的配合力及其遗传参数。结果表明:自交系CML172、M4-11、966、M4-6、屏建155的一般配合力(GCA)较高,自交系TF97R-231、CML295-10的综合性状较差;组合M4-6×CML172、966×CML172等具有较强的杂种优势,有一定的增产潜力。对株高等4个性状宜早代选择,对穗粗等3个性状宜进行晚代选择。用云南省的地方种质与外来种质组配,易获得较强杂种优势。

In the study, five exotic tropical, subtropical maize inbred lines were crossed with five Yunnan local maize inbred lines by Griffing IV mating design. The 45 crosses were evaluated in three different environments of Yunnan province and combining ability and genetic parameter of eight agronomic characters were analyzed. The results showed that the inbreds CML172, M4-11, 966, M4-6 and Pingjian-155 had higher general combining ability （GCA）, inbreds TF97R-231 and CML295-10 had poor agronomic traits. The crosses M4-6 × CML172, 966 × CML172 had higher heterosis and high yield potential. Four traits such as plant height should be selected at early generation and three traits such as ear diameter should be selected at later generation. The combinations between the local germplasm in Yunnan and exotic germplasm usually had higher heterosis.