Genetic
engineering has begun about 160 years ago with discover inheritance laws of
biological traits, isolation and purification of DNA from inner cell, replication
and propagation of its pieces with polymerase chain reaction in vitro,
identification and purification favorable genes and transfer them with Agrobacterium tumefaciens bacterium, or directly to
plants cell, by gene gun, and produce whole transgenic plant, from gene modified cell with tissue
culture methods innovation and fully developed in recent 4 decades. With this
technology transfering favorable genes,
without accompaniment with unwanted
genes, into plants is possible, and resistance transgenic plants to fungal,
bacterial, viral and nematodes, and tolerant to environmental stress produced. Genetic
engineering has created hope for better plants diseases management and increase
agricultural production to meet food needs of a growing human population.
