The heterotic groups and patterns of maize germplasm were summarized based on the pedigree of hybrids used dominantly in Jilin province during the past2 decades.

• 根据我国玉米优势群划分结果,结合育种实践,将我国的玉米种质分为外引优势群、中国优势群和热带优势群3个;杂优模式为外引优势群×中国优势群、引优势群×带优势群和中国优势群×带优势群。