When the unexpected linkage drag occurred, it will endeavor to
achieve a breeding goal using conventional approaches in
particular when the target gene is linked with an unfavorable
dominant gene. However, the goal can be obtained using molecular
markers as a tool for selection. The main objective of this study was
to combine KD grain quality traits with BPH resistance, and it was
successfully introgressed the BPH resistance gene from RH into KD
by MAS in three generations of backcrossing and dissected the
linkage drag between the introgressed Bph3 and Wxa allele, which
mainly responsible for an unfavorable characteristic of the grain
quality traits, from the donor cultivar.