A.the 1980s，scientists have been analysing the mysterious of the sugar canes genetic code.
B.Unfortunately，however，the plant started to become weaker and more prone to disease.
C.The majority of the world’s sugar now comes from this particular commercial species.
D.One major gene has been identified by Dr. Angellique D’Hont and her team in Montpeller，France.
E.Eventually，a commercial plant was developed which was 5 percent sweeter than before，but also much stronger and less likely to die from disease.
F.Sugar cane is now much more vigorous and the supply of sugar is therefore more guaranteed.