This paper is relevant to the impact areas in the following areas:
|Tags:||trait development, trait introgression|
Abstract or Summary
Plant breeding for crop genetic improvement involves the cycle of creating genetic diversity and exploiting that diversity to derive an improved cultivar with outstanding performance for speciﬁc traits of interest. Genetic modiﬁcation through transformation essentially expands the genepool to facilitate access to genes otherwise not available through crossing. Transgenic events are deﬁned by the DNA sequence that has been incorporated into the target genome and the speciﬁc point(s) of insertion. In the development of a new transgenic trait, typically many events are generated and evaluated with the aim of identifying one exhibiting consistent trait expression at or above speciﬁed thresholds, stable inheritance, and the absence of any negative eﬀects. With transgenic traits for maize, once commercial candidates have been identiﬁed, these events are introgressed into elite lines, often through the use of molecular markers that can accelerate the breeding process and aid in producing a quality conversion. Converted elite lines are yield-tested to ensure performance equivalency with their unconverted counterparts. Finally, before commercial sale of seed, quality control monitoring is conducted to ensure event identity and purity and the absence of any unintended events. This monitoring complements other quality control measures to conﬁrm seed viability and line/hybrid purity and uniformity in seed treatments, all in an eﬀort to ensure customer satisfaction and to comply with governmental regulations. Thus, genetically modiﬁed (GM) cultivars are subject to signiﬁcant testing and auditing prior to seed sale and distribution to farmers, more testing and auditing than with non-GM cultivars.
A Look at Product Development with Genetically Modiﬁed Crops: Examples from Maize (held on an external server, and so may require additional authentication details)
CropLife International fully acknowledges the source and authors of the publication as detailed above.