Aj. Conner et Mc. Christey, PLANT-BREEDING AND SEED MARKETING OPTIONS FOR THE INTRODUCTION OF TRANSGENIC INSECT-RESISTANT CROPS, Biocontrol science and technology, 4(4), 1994, pp. 463-473
Genetic engineering offers considerable potential for the development
of insect-resistant crop plants through the transfer and expression of
Bacillus thuringiensis genes encoding insecticidal proteins. A potent
ial problem with the use of such crops is the possibility of insects a
dapting to overcome the resistance mechanism. Strategies to minimize t
his risk have included concepts of seed mixtures and crop rotations. T
his may involve genotypes transformed with a series of genes encoding
different resistance mechanisms and/or manipulating the manner in whic
h these genes are expressed. The aim of this paper is to put these str
ategies into perspective with respect to the limitations imposed by th
e nature of plant transformation the traditional approaches to plant b
reeding for cultivar development and seed marketing options for commer
cial release of transgenic crops. The optimum strategy for any specifi
c crop varies depending on whether the cultivar targeted for release i
s a clone, an inbred line, a hybrid or an open pollinated population.