Ten Napier grass accessions were evaluated for their agronomic traits
under diverse environmental conditions of Ethiopia. The study was conducted in
randomized complete block design with three replications. Data on plant height
and dry matter yield were analyzed using the general linear model procedures of
SAS and least significance difference was used for mean comparisons. The
combined analysis of variance indicated that the main effect differences among
genotypes, environments and the interaction effects vary significantly for
measured agronomic traits. The combined analysis for plant height differed
significantly (P<0.05), which ranged from 103.80 to 132.03 cm with a mean of
114.93 cm. The local accession gave the highest mean plant height followed by
accession 16819 and 15743 while accession 16792 gave the lowest over locations.
Of the total variance of dry matter yield, environment main effect accounted
for 40.6%, whereas genotype and genotype by environment interaction effects
accounted for 14.8% and 38.8% respectively. The highest mean dry matter yield
was recorded at Adamitulu (13.06 t/ha) followed by Areka (12.80 t/ha), Hawassa
(11.80 t/ha), Debre zeit (10.50 t/ha) and Holetta (7.05 t/ha). The combined
analysis indicated that dry matter yield varied significantly (P<0.05) among
the tested accessions and the yield ranged from 7.97 to 12.57 t/ha with a mean
of 11.04 t/ha. Accession 16819 and 16792 gave the highest and lowest dry matter
yield respectively. Generally, Napier grass accessions respond differently
across the testing environments due to differential responses of the genotypes
to various edaphic, climatic and biotic factors. - See more at:
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