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植物杂种优势利用为解决人类粮食问题作出了巨大贡献。但由于生殖隔离现象存在，常规育种技术一直难以有较大突破。植物基因工程技术的兴起和发展为彻底打破生殖隔离障碍创造了条件。人们将可自由地改变作物的遗传特性，创造新品种，丰富种质资源。 植物基因工程是指将外源目的
The use of plant heterosis makes a great contribution to solving the human food problem. However, due to the existence of reproductive isolation, conventional breeding technology has been difficult to have a greater breakthrough. The rise and development of plant genetic engineering technology has created conditions for completely breaking the barrier of reproductive isolation. People will be free to change the genetic properties of crops, create new varieties and enrich germplasm. Plant genetic engineering refers to exogenous purposes