SFRP4 and benign prostatic hyperplasia: Among the PYLs, two PYLs, BPH20 + BPH32-PYL and BPH2 + BPH3 + BPH17-PYL, had relatively high resistance, suggesting that PYLs with combinations of these genes are likely to provide good resistance against the current BPH populations that arrive to Japan (Koshi-2013).