Research Progress on Tree Breeding for Pest Resistantce
The planting area of pure plantation forest is large,and the threat of pests is serious.Thus,the re-search on tree breeding of pest resistance have become a key field of forest protection and yield increase.We reviewed the research progresses related to breeding of insect-resistant trees.Studies have shown that insect resistance of tree is a synergistic effect of multiple defense mechanisms,including chemical and phys-ical defense.External factors such as mechanical damage and insect infestation trigger the plant's induced defense mechanism.The rapid development of molecular biology has promoted the rise of molecular breed-ing of trees,and recombination DNA technology has successfully introduced exogenous insect resistance genes into trees genomes to breed new transgenic insect-resistant forest varieties.In addition,RNAi tech-nology has also become a hot research topic,which has higher selectivity and safety than traditional trans-genic technology.In the future,with the progress of science and technology,there searches on insect resist-ance breeding of trees will be more in-depth and combined with multiple disciplines to provide a broader prospect for the improvement of forest insect resistance.
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