Plant breeding for stress environments: Are we making progress?
2001
Blum, A.
Although conventional breeding has been attaining slow but steady progress in plant breeding for stress environments, an impressive effort is now being made to apply molecular biology as a means for accelerating progress. In this respect, molecular biology is applied via two main channels: (1) marker-assisted selection of physiological and developmental stress-resistance traits to augment conventional yield-based selection programs, and (2) genetic engineering consisting mainly of "mining" and "Inserting" stress/responsive/adaptive genes that are expected to transform plants into being more stress resistant in the field. The first channel appears to have produced an increasing number of successful cases in recent years. It is presently limited mainly by the often poor quality of phenotyping of the mapping populations for stress-resistance quantitative trait loci. It might be limited in the future by the presently insufficient research in crop stress physiology.
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