Breeding Haploid-induced Corn Lines for Fresh Consumption in Fujian

  Objective   The haploid technology for high-efficient commercial corn breeding was applied to provide an exemplary breeding program in Fujian.

  Method   The external high-frequency induction MHI and EDI and the oil-rich induction H3 were combined with the materials from local adaptive sweet and waxy corn cultivars to establish a base population. Through continuous testing for oil content, adaptability, and haploid induction rate during breed self-purification, new corn varieties were obtained.

  Result   Two haploid-induced corn lines suitable for fresh consumption were selected. FSI-4 had a relatively high oil content with an average induction rate of 10.32%. It displayed desirable agronomic characters, large amount of pollen, and strong overall resistance. The 8.99% oil content could be further improved by selective breeding using the target markers. The haploid-induced common waxy corn FWI-2 had an average induction rate of 11.08%. It also demonstrated with desirable agronomic characters, large amount of pollen, strong overall resistance, and distinct color markers. The two breeds were both applicable for haploid induction of new corn variety breeding program.

  Conclusion  Two haploid-induced corn lines were obtained to be used as a material for haploid breeding of fresh-consumption corn cultivars in Fujian.