病毒病

Hefeng 44, Hefeng 45 were found to be double-resistant to Frogeye leafspot and Soybean Mosaic Virus.

2份抗毒、灰斑的双抗资源，合丰44号和合丰45号。

It undrew the prelude of transgenic breeding that the company of Monsanto Company obtained the first transgenic tobacco plant which had resistance to tobacco virus by transgenic technique in 1986.

1986年美国孟山都公司利用转基因技术获得了第一株抗毒的转基因烟草植株，拉开了转基因育种的序幕。