ObseiV3tion nursery, Initial evaluation trial as post rainy season and co-ordinated Varietal trial, Fanners
field trial on cowpea as spring and post rainy seasons were conducted during 1997/98, 1998199 and
199912000 to select high yielding, early maturing genotypes for different locations. In observation nursery
IT85F-226 produced the highest mean grain yield of 1823 kglha ·at Rampur. In JET none of the tested line
produced significantly higher mean yield than check Aakash (I 569 kglha). Combined analysis of CVT
over 4 locations planted as post-rainy season during 1998/99 crops showed that there was significant
difference in location in seed yield. The highest grain yield was produced at Rampur (2019kg/ha) and it
was the lowest at Surkhet 503 kglha. Significant differences among the genot)'pes over locations were also
recorded. Genotypes IT82D-787 (1468 kglha) produced higher mean grain yield than both the checks.
Interaction effect of genotypes and environments was significant, indicatinB that variety should be
recommended on location basis. Combined analysis of grain yield of 199912~0 also showed significant
differences among the locations. The highest mean grain yield ( 1238 kglha) was produced at Surkhet while
the lowest (667 kg/ha) at Nepalgunj. Genotype IT 860- 792 had significantly higher mean yield over both
Aakash (971 kglha) and Prakash (917 kglha). Interaction effect of genotype and environment revealed that
except Nepalgunj IT 860- 792 produced high yield at all the locations and statistical analysis of 100 seed
weight of 199912000 indicate that genotypes IT 860 - 792 produced significantly highest mean seed
weight of 16.87g and is a candidate for release.

ObseiV3tion nursery, Initial evaluation trial as post rainy season and co-ordinated Varietal trial, Fanners
field trial on cowpea as spring and post rainy seasons were conducted during 1997/98, 1998199 and
199912000 to select high yielding, early maturing genotypes for different locations. In observation nursery
IT85F-226 produced the highest mean grain yield of 1823 kglha ·at Rampur. In JET none of the tested line
produced significantly higher mean yield than check Aakash (I 569 kglha). Combined analysis of CVT
over 4 locations planted as post-rainy season during 1998/99 crops showed that there was significant
difference in location in seed yield. The highest grain yield was produced at Rampur (2019kg/ha) and it
was the lowest at Surkhet 503 kglha. Significant differences among the genot)'pes over locations were also
recorded. Genotypes IT82D-787 (1468 kglha) produced higher mean grain yield than both the checks.
Interaction effect of genotypes and environments was significant, indicatinB that variety should be
recommended on location basis. Combined analysis of grain yield of 199912~0 also showed significant
differences among the locations. The highest mean grain yield ( 1238 kglha) was produced at Surkhet while
the lowest (667 kg/ha) at Nepalgunj. Genotype IT 860- 792 had significantly higher mean yield over both
Aakash (971 kglha) and Prakash (917 kglha). Interaction effect of genotype and environment revealed that
except Nepalgunj IT 860- 792 produced high yield at all the locations and statistical analysis of 100 seed
weight of 199912000 indicate that genotypes IT 860 - 792 produced significantly highest mean seed
weight of 16.87g and is a candidate for release.