genetically improved strain of tree

例句：

1. 1.The genetically improved strain of the treeis highly resistant to pests.
   这种树的基因改良品种对害虫有很强的抵抗力。
2. 2. The genetically improved strain of thetree has been widely planted in many regions.
   这种树的基因改良品种已在许多地区广泛种植。
3. 3. The genetically improved strainof the tree has become a popular choicefor landscaping.
   这种树的基因改良品种已成为园林绿化的热门选择。