Journal
PLANT BREEDING
Volume 121, Issue 4, Pages 281-291Publisher
WILEY
DOI: 10.1046/j.1439-0523.2002.730285.x
Keywords
candidate gene analysis; disease resistance; epistasis; germplasm banks; G x E interaction; linkage maps; marker-assisted selection; molecular markers; pleiotropy
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The joint analysis of genotype marker segregation and phenotypic values of individuals or lines enables the detection and location of loci affecting quantitative traits (QTL). The availability of DNA markers and powerful biometric methods has led to considerable progress in QTL mapping in plants. The most obvious applications of QTL analysis seem to be marker-assisted selection (MAS) in breeding and pre-breeding and QTL cloning. However, other areas are envisaged where QTL analysis can contribute decisively. These are: the understanding of complex traits such as plant-pathogen interaction; plant genomics, connecting proteins and regulatory elements of known functions to QTL by candidate gene analysis; and germplasm enhancement through a characterization that allows its efficient utilization. The success in all these applications depends primarily on the reliability and accuracy of the QTL analysis itself. Therefore, the discussion of its limitations will constitute an important part of this review.
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