The project of "Foraging Type Salt-tolerant Transgenic Tetraploid Locust Locust, Breeding of New Variety Breeding and Industrialization Development" undertaken by the Shandong Academy of Forestry has recently passed the safety assessment organized by the State Forestry Administration. The Forestry Animal Genetic Engineering Safety Committee of the State Forestry Administration has approved the field trials of tetraploid Robinia pseudoacacia and Roe deer breeding, which indicates that the salt tolerant tetraploid Robinia pseudoacacia and Roe deer have been successfully cultivated in China. Experts from the Shandong Academy of Forestry said that after testing, salt-tolerant drought-resistant genes have been integrated into the genome of newly-selected tetraploid Robinia pseudoacacia and Locust plants. Tests in vitro showed that the resistance to salt of transformed tetraploid Robinia pseudoacacia plants increased by 2‰ to 3‰ compared to the control (untransformed) plants. The transformed tetraploid Robinia pseudoacacia grew normally in the soil containing 5‰ to 6‰ salinity, and the plants grew in the 8‰~10‰ salinity soil. China has a large area of ​​inland and coastal saline-alkaline lands. Due to the lack of salt-tolerant and high-value plant materials, especially the scarcity of tree species, these ecologically fragile areas are severely constrained to carry out ecological construction. Therefore, improving salt tolerance and drought resistance of tree species has been an important issue in the field of forest tree breeding research. The use of modern transgenic technology to transfer the target gene into trees is an effective way to increase the salt and drought resistance of trees.
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