Inheritance Of Resistance To Fusarium Moniliforme Ear Rot In Maize By Near Isogenic Lines

Fusarium ear rot is a fungal disease with devastating and widespread in the world, which not only affects yield and quality, but also generates the fumonisins that posing a potential threat to animal and human health.The most effective way to prevent this disease is resistant breeding, which depends on the resistant materials and resistance genes.It was showed that the inheritance of resistance to Fusarium ear rot was conditioned by polygenes from a few researches in the world. The single segment introgression lines were developed by using N6 and BT-1 as a recurrent parent and current parent, respectively, by marker assistant selection, and the resistant near isogenic lines were developed by the inoculation, the inheritance of resistance to Fusarium moniliforme ear rot in maize was studied by the near isogenic lines.The results are as follows:1.The Susceptible inbred line N6 was used as recurrent parent, and the resistant inbred line BT-1 as non- recurrent parent, phenotypic selection with marker assistant selection were used for selecting for the genetic background of N6. Crossing once, backcrossing 4 times, then got the 339 SSILs.2. The resistant near isogenic lines, 90% background of the recurrent parent was recovered in the BC4F1 generation by 153 SSR markers, were developed by the inoculation with marker assistant selection in 4 years. The inheritance of resistance to Fusarium moniliforme ear rot in maize was studied by the lines, and the results showed that the resistance genes were identified both in chr.4 and chr.6.