烟草花叶病对烤烟产值、产量的影响以及不同抗性品种(系)间损失当量的比较

STUDIES ON THE OUT-PUT VALUE LOSSES OF FLUE-CURED TOBACCO CAUSED BY MOSAIC VIRUS DISEASE AND A COMPARISON BETWEEN SUSCEPTIBLE CULTIVAR AND TRANSGENIC RESISTANT LINE

通过大量田间病情调查并收集众多烟农烘烤后出售烤烟的数据,研制了田间烟草花叶病情指数与烤烟亩产值之间相互关系的数学模型。感病品种NC89在中上等生产水平的烟田亩产值(Y)与病情指数(x)的关系可用下述经验方程表示: Y=612.276-7.207X………(1)感病品种NC89在中下等生产水平的烟田亩产值与病情指数的关系式为: Y=393.335-10.422X……(2)另选转基因NC89抗花叶病新品系的烟田若干地块,在中上等生产水平下,其田间病情指数与产值的关系式为: Y=619.448-8.1.40X……(3)将方程(1),(3)进行比较,两者截距相似,b值(斜率)差异不显著,故将两方程合并成为: Y=614.085-7.281X…(4)以上情况说明,在生产水平和烤烟技术相同的条件下,转基因抗病品系的产值损失相比,在组建方程的病指范围(20%以下)内,两者的损失当量相同。

By means of large scale field disease severity investigation and the collection of out—putvalue date after saling the flue—cured tobacco leaves.Some mathematic models related to theout—put value losses and field mosaic virus disease index of flued—cured tobacco were established. The susceptible cultivar NC 89 under the upper—middle productive level,the out—put value of flue—cured tobacco(y)and field disease index(x)could be expressed by the following e-quation: Y=612.276-7.207x……(1)while the same susceptible cultivar under the lower—middle productive level,the relationship between the two variants could be: Y=393.335-10.422x……(2)A new line of trangenic resistant to mosaic virus disease,under the upper—middle productive level,the relation ship between the two variants were: Y=619.448-8.140x……(3)When a comparison between the equations of (1) and (3) was made,we fourd that the value of"a"in the equations were similar,and the difference were not significant between the 4value of"b"in the two equations,so the two equations were combined into: Y=614.085-7.281x……(4)That means,under the similar conditions of planting and flue—curing technics,the output value losses caused by mosaic virus disease could be no difference between the susceptible cultivar and a transgenic resistant line of tobacco when the field disease inders were he same.