The discoveryof SNP (Single Nucleotide Polymorphism) markers will further Agronomy 2011, 1 5enhance the molecular toolkit for peanut, although high-throughput SNP genotyping in the tetraploid will be challenging [23]. From a cultivar development standpoint, however, these advances in technology have enabled the identification of molecular markers associated with quantitative trait loci (QTLs) for several economically significant traits. Recent research has resulted in the discovery of molecular markers associated with resistance to foliar diseases, rust and late leaf spot [18,34-36], resistance to Cylindrocladiumblack rot and early leaf spot [14], nematode resistance [37-40], resistance to TSWV [17], resistance to the aphid vector of groundnut rosette disease [41], drought tolerance [15,42], yield parameters [43], high oleic acid [44,45], and seed biochemical traits [46]. Many of these QTLs are not major, i.e., they account for <10% of the phenotypic variation explained.
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