The Utilization Present Situation and Study Advances of the Germplasm in Southwest Maize Zone

Southwest maize zone is one of the largest maize zone of China, Ac counting for about 30% of total area and total output of the nation.But the dist inct also has the serious problem of narrow germplasm basic in maize breeding an d in hybrid, Moreover narrow germplasm basic often results in the massive outbre ak of pest.In the same time, narrow germplasm basic also leads to the maize outp ut level without advance.So the article emphasized on introducing, utilizing pre sent situation and study advances on local germplasm, wild germplasm, heterosis group, and heterotic pattern of Southwest maize zone in recont years and brouyht out several improved advices aimed at questions of germplasm utilization and re search in the region including germplasm enlargement, germplasm improvement and germplasm innovation etc.