Analysis on the germplasm background and heterotic patterns of maize hybrid in Guangxi

Analysis of germplasms utilized in maize breeding and commercial ed production was conducted. The results demonstrated that the increase of maize yield level in Guangxi during 1950 - 1990 years was profited chiefly from the broadening, improvement and invention of maize germplasm resources. The main maize germplasms in Guangxi were divided into six heterosis groups: Moyellow 9, Lancaster, Reid, Ludohonggu, Sipingtou and Others. Three main heterotic patterns which widely ed in Guangxi were proposed: Lancaster group/Moyellow 9 groups, Reid groups/Moyellow 9 grouch and other group/Moyellow 9 groups. The results the showed that both maize germplasm base and heterotic patterns in Guangxi were very narrow. Broadening, improvement and invention of maize germplasm resources in Guangxi should be strengthened.