Agro-Morphological characterization of two rice varieties from japan; orysa sativa l. and four nericas varieties in an agro-ecological zone of the town of yaounde (cameroon); comparative study of their performances

The performances of four lines of the NERICA variety and two varieties of the Oryzasativa species were evaluated by considering parameters such as the number of panicle per rice plant, the number of primary branches of the panicles, panicle length, the plant height, the number of grains and empty balls per panicle. It appears that O. sativa from Japan has a number of empty balls less than NERICA’s varieties from Africa. We also noted that O. sativa has the highest number of panicles per rice plant (a mean of 14.05 ± 6.14). However, the number of grains per panicle NERICA’s varieties was very high (a mean of 164 ± 38.82) and therefore they shows more attractive characters than Orysa sativa lines. The differences were statistically significant above all the parameters considered in both African and Japan rice studied. A significant correlation that was negative has been observed between the number of panicles per rice plant and the number of primary branches per panicle within the NERICA 9 variety (P <0.05). The correlation was highly significant and positive (P <0.001) between the number of primary branches per panicle and the number of grain per panicle. These results suggest another demonstration of the hybrid vigor of NERICA varieties.