Four field experiments (IYTE,CVTE, CFFTE, Population improvement) were conducted at
different locations during summer and winter of2009, 2010 and 2011 with the objective of
identifying and developing high yielding, insect pest tolerance, early maturing matching to
cropping system (as three crops for a year) maize varieties for hill, terai and inner terai of
Nepal. In IYTE, the genotypes S03TEYILN (5276 kg -ha), ACROSS-2401 (4605 kg -ha),
S03TEY-FM (ER), (4.518tlha) and S03TEY-SEQ (4126 kg -ha) were promising for grain
yield and maturity period; therefore they were promoted to CVT. In CVTE, the genotypes:
POP-44 I POOL-15 (3841 kg-ha), Khumal Y/ POOL-17 (3699 kg-ha) and POP-45/POOL-17
(3346 kg-ha) were noted high yielding with early maturity over the locations and Arun-lEV,
Arun-4 were promoted to CFFTE. In CFFTE, the genotypes: Arun-1 Ev and Arun-4 were
significantly superior over other genotypes and Pool-17 was the earliest in maturity. Hence,
Arun-lEV (white) and Arun-4 (yellow) and Pool-17 were already proposed for variety
release for general cultivation as early and Pool-17 as extra- early. Two cycles of
population improvement for Arun-4, Arun-1EV and Pool-17 have been completed by
adopting half-sib family selection method. Stratified mass selection was used for
maintenance and improvement of promising prerelease/released varieties.

Four field experiments (IYTE,CVTE, CFFTE, Population improvement) were conducted at
different locations during summer and winter of2009, 2010 and 2011 with the objective of
identifying and developing high yielding, insect pest tolerance, early maturing matching to
cropping system (as three crops for a year) maize varieties for hill, terai and inner terai of
Nepal. In IYTE, the genotypes S03TEYILN (5276 kg -ha), ACROSS-2401 (4605 kg -ha),
S03TEY-FM (ER), (4.518tlha) and S03TEY-SEQ (4126 kg -ha) were promising for grain
yield and maturity period; therefore they were promoted to CVT. In CVTE, the genotypes:
POP-44 I POOL-15 (3841 kg-ha), Khumal Y/ POOL-17 (3699 kg-ha) and POP-45/POOL-17
(3346 kg-ha) were noted high yielding with early maturity over the locations and Arun-lEV,
Arun-4 were promoted to CFFTE. In CFFTE, the genotypes: Arun-1 Ev and Arun-4 were
significantly superior over other genotypes and Pool-17 was the earliest in maturity. Hence,
Arun-lEV (white) and Arun-4 (yellow) and Pool-17 were already proposed for variety
release for general cultivation as early and Pool-17 as extra- early. Two cycles of
population improvement for Arun-4, Arun-1EV and Pool-17 have been completed by
adopting half-sib family selection method. Stratified mass selection was used for
maintenance and improvement of promising prerelease/released varieties.