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Vol.1 , No. 4, Publication Date: Oct. 21, 2014, Page: 88-95
 between genotypes on panicle exertion under low temperature conditions. NERICA14 (7 cm) scored the highest value whereas NERICA12 (-3.870 cm) the smallest followed by NERICA4 (-3.665 cm). The high reduction in panicle exertion from +3.430 cm to -3.120 cm, almost 200 % reduction (NERICA16), was due to the fact that this genotype exhibited both positive and negative values, which correspond to complete and incomplete panicle exertion, respectively. There were significant differences (p=0.05) between genotypes on spikelet fertility percent at low temperature but no significant between genotypes at normal temperature. 92.26, 90.160% (highly fertile) were found on NERICA7 and NERICA2, respectively. On the other hand 50.021, 59.593 and 64.65 % (Partly sterile) were presented on NERICA10, NERICA14 and NERICA11, respectively. The ANOVA revealed that NERICA7 gave highest yield (3222.10 kg/ha) followed by NERICA6 (3024.11kg/ha) in low temperature. Strong positive correlation (r = 0.49, p = 0.01) between spikelet fertility percent and grain yield found during low temperature condition means as spikelet fertility increased so did on grain yield. Genotypes, NERICA 7 combined all high mean panicle exertion, spikelet fertility and grain yield/ha and could be characterize as ideal genotype.&picture=http://www.aascit.org/aascit/decorators/img/journal/923.jpg)
| [1] | Abebaw Dessie, Ethiopian Institute of Agricultural Research, National Rice Research and Training Center, Woreta Ethiopia. |
| [2] | Irie Kenji, Tokyo University of Agriculture, 1-1-1, Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan. |
| [3] | Hironobu Shiwachi, Tokyo University of Agriculture, 1-1-1, Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan. |
The study was conducted with the objective to examine the potential of panicle exertion, spikelet fertility percent and grain yield of twenty-two upland rice varieties in three different growing seasons. The experiment was laid out in randomized completely block design with two replications in experimental station of Tokyo University of Agriculture. ANOVA result revealed that there were strong significant differences (p =0.01) between genotypes on panicle exertion under low temperature conditions. NERICA14 (7 cm) scored the highest value whereas NERICA12 (-3.870 cm) the smallest followed by NERICA4 (-3.665 cm). The high reduction in panicle exertion from +3.430 cm to -3.120 cm, almost 200 % reduction (NERICA16), was due to the fact that this genotype exhibited both positive and negative values, which correspond to complete and incomplete panicle exertion, respectively. There were significant differences (p=0.05) between genotypes on spikelet fertility percent at low temperature but no significant between genotypes at normal temperature. 92.26, 90.160% (highly fertile) were found on NERICA7 and NERICA2, respectively. On the other hand 50.021, 59.593 and 64.65 % (Partly sterile) were presented on NERICA10, NERICA14 and NERICA11, respectively. The ANOVA revealed that NERICA7 gave highest yield (3222.10 kg/ha) followed by NERICA6 (3024.11kg/ha) in low temperature. Strong positive correlation (r = 0.49, p = 0.01) between spikelet fertility percent and grain yield found during low temperature condition means as spikelet fertility increased so did on grain yield. Genotypes, NERICA 7 combined all high mean panicle exertion, spikelet fertility and grain yield/ha and could be characterize as ideal genotype.
Keywords
NERICA, Panicle Exertion, Spikelet Sterility, Grain Yield, Low Temperature, Correlation, Upland Rice, Ethiopia
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