Detection of molecular markers linked to Ry genes in potato germplasm for marker-assisted selection for extreme resistance to PVY in AAFC's potato breeding program

摘要

Molecular markers reported to be linked to extreme resistance (ER) against Potato virus Y (PVY) were evaluated in potato germplasm. YES3-3A and YES3-3B, markers linked to Ry(sto), were detected in 'Barbara' and its three descendants that exhibit ER to PVY; RYSC3, a marker linked to Ry(adg), was detected in breeding clones NY121 and NY123. Assessment of RYSC3 as a marker for selection for Ry(adg)-mediated ER validated its efficacy in identification of selections with ER to PVY.