The impacts of T-DNA intergenic insertion on rice agronomic characters, feeding preference and population abundance of sucking insect pests on T-DNA inserted rice mutants were evaluated for unintended effects resulted from transgenic manipulation or gene insertion. The results indicated that the expression of the OPR(12-oxophytodienoate reductase) gene near the insertion site was not affected in all the four mutant lines ZD1640-3, ZD1640-19, ZD1640-23 and ZD1640-24. Major agronomic characters were not signi...