Hybrid maize varieties yield more in high inputs condition. Hybridization is the method of producing
new crop varieties in which two or more genotypes of different genetical constitution are 'crossed
together. Hybridization offers the greater possibilities in crop improvement. Nepalese policy mal{ers
have recognized the importance of hybrid varieties and have mentioned in nationa{ policy
documents. Therefore, Agriculture Botany Division, Khlimaltar is evaluating local as well as exotic
germplasm focusing on hybrid development in collaboration with NMRP, Rampur and CIMMYT,
Mexico, Zimbabwe and Thailand with objective of identifying superior genotypes for high inputs mid
hill condition of Nepal, and to develop and maintain maize inbred lines for hybrid development.
During last three years (1999-2001), number of inbred lines and hybrid trials from different sources
were evaluated at Khumaltar. Most of the hybrid yielded more than 1 0-ton ha"1
, whereas some of the
hybrid yielded as much as 14 ton ha-1
• CML 287 X CML 323, CML 226 X CML 295, NC 300 X ClvfL
323 and NC 300 X CML 295 etc, hybrids were found high yielder and promising. Whereas NC 300 X
CML 323 was the earliest in maturity and the shortest in plant height. In cross-pollinated crops,
parents are artificially selfed to generate ideal inbred. At Khumaltar, inbred lines of superior
hybrids were evaluated and maintained. In 2001 the inbred line were crossed to develop Fl
generation seed, where 5 best female inbred and 5 best male inbred lines were used and twenty-one
single cross F1 hybrids were developed ~nd they will be tested in 2002. CML series 20, 223, 226,
287, 295, 323, 324, 327, 329, NC 300 and Ali!ATLCOHS 92-1-1-3E-1-4-2-3-1-B-B inbred lines were
promising in combining ability and agronomical characters, and they will be used in developing
maize hy brids in.fitture.

Hybrid maize varieties yield more in high inputs condition. Hybridization is the method of producing
new crop varieties in which two or more genotypes of different genetical constitution are 'crossed
together. Hybridization offers the greater possibilities in crop improvement. Nepalese policy mal{ers
have recognized the importance of hybrid varieties and have mentioned in nationa{ policy
documents. Therefore, Agriculture Botany Division, Khlimaltar is evaluating local as well as exotic
germplasm focusing on hybrid development in collaboration with NMRP, Rampur and CIMMYT,
Mexico, Zimbabwe and Thailand with objective of identifying superior genotypes for high inputs mid
hill condition of Nepal, and to develop and maintain maize inbred lines for hybrid development.
During last three years (1999-2001), number of inbred lines and hybrid trials from different sources
were evaluated at Khumaltar. Most of the hybrid yielded more than 1 0-ton ha"1
, whereas some of the
hybrid yielded as much as 14 ton ha-1
• CML 287 X CML 323, CML 226 X CML 295, NC 300 X ClvfL
323 and NC 300 X CML 295 etc, hybrids were found high yielder and promising. Whereas NC 300 X
CML 323 was the earliest in maturity and the shortest in plant height. In cross-pollinated crops,
parents are artificially selfed to generate ideal inbred. At Khumaltar, inbred lines of superior
hybrids were evaluated and maintained. In 2001 the inbred line were crossed to develop Fl
generation seed, where 5 best female inbred and 5 best male inbred lines were used and twenty-one
single cross F1 hybrids were developed ~nd they will be tested in 2002. CML series 20, 223, 226,
287, 295, 323, 324, 327, 329, NC 300 and Ali!ATLCOHS 92-1-1-3E-1-4-2-3-1-B-B inbred lines were
promising in combining ability and agronomical characters, and they will be used in developing
maize hy brids in.fitture.