At the maturity, 19, 29 and 33
plants that had obviously higher yield than HHZ were visually
selected from the HHZ/IR64, HHZ/AT354 and HHZ/C418 populations.
The 81 DT selected HHZ BC2F3 introgression lines (ILs) and
HHZ were progeny tested under both irrigation and drought
stress conditions at the CAAS experimental station in Beijing in
the 2010 summer.