基于玉米新品种联创808选育的商业育种问题探讨

Breeding of a Corn Hybrid Lantron808 and Its Implication for Commercial Breeding

联创808是以中早熟、丰产潜力大、抗倒伏、耐密植、抗病、脱水快、适合机收、适应性广为选育目标,以自选系CT3566为母本、CT3354为父本育成的玉米新品种,联创808通过了黄淮海、东华北(含东北中熟、东华北中晚熟两个熟期组)、西北、西南四大玉米主产区5个熟期组的国家审定。分析联创808在国家区域试验和生产试验中的产量表现及其农艺性状、抗倒性、耐密性、子粒品质和青贮的饲用品质,根据联创808的表现与选育过程的体会,对玉米商业育种的相关问题进行较为深入的探讨,特别是关于优点叠加育种法、杂种优势群划分的理解与利用、杂优模式的梳理总结等问题。

Lantron808 is a corn hybrid created in 2012 using CT3566 and CT3354 as female and male parents respectively,which satisfies the trait breeding goals of Mid-early maturity,high yield potential,lodging resistance,high density planting,disease resistance,fast dehydration,machine-harvesting,and wide adaptability.Lantron808 has been approved in five national trials for commercial corn production in four major corn production regions and five maturity zones including Huang-Huai-Hai summer corn region,Northeast region(in both Northeast medium ma⁃turity zone and East Huabei medium and late maturity zone),Northwest region,and Southwest region.The yield per⁃formance of Lantron808 in national and regional multi-location trials,and production trials were reported,along with its excellent characteristics in agronomic traits,lodging resistance,density tolerance,and feed quality of silage.According to the performance of Lianchuang808 and the experience of the breeding process,related issues on com⁃mercial breeding were discussed.In particular,the pyramiding breeding of favorite traits,the assignment of heterotic group and their implications to heterosis.