ideotype became the “New Plant Type” (NPT) highlighted in IRRI’s
strategic plan (IRRI 1989) and breeding efforts to develop NPT were
initiated in 1990. The objective was to develop improved germplasm with
15-20% higher yield than the existing high yielding varieties. Numerous
breeding lines with desired ideotype were developed (Khush 1995)
and shared with the national rice improvement programs. Three NPT lines have
been released in China and two in Indonesia. Other NARS are evaluating and
further improving NPT lines.