Construction of Molecular Genetic Map of Wheat

Abstract

Molecular genetic map not only provides a powerful tool for the analysis of quantitative trait loci (QTLs) and marker-assisted selection (MAS) at the genomic level, but also lays a foundation for fine mapping and cloning important genes. In this chapter, the unique characteristics and breeding values of the six molecular genetic maps (1 DH, 3 RIL, and 2 natural populations) constructed by SSR, DarT, and SNP markers were illustrated. The parents for each genetic map have some distinguishing features, such as agronomic traits, yield, and/or quality traits. The average distances between adjacent markers in the wheat maps were appropriate (0.44–9.77 cM), thus meeting the recommended requirement for genome-wide QTL scanning. The molecular genetic maps have been used to QTL mapping for some agronomic traits, yield and quality traits, and the good results have been achieved.