The study was carried out, on the rice perimeter of Southern Benin, to evaluate
the response of irrigated and lowland rice varieties to the complete and
partial submergence using agro-morphological traits. Method: Thus, 15 rice
varieties were submerged in the field during 60 days according to split plot experimental
design with two factors and three replications. Agro-morphological parameters
such as plant height, number of tillers, the distance of internodes and the
number of internodes were measured respectively at 13 days and 45 days. After
harvest, some traits such as length, width and thickness of grains, panicle
length, number of primary and secondary branches, the average number of empty
grains and full grains per panicle and 1000-grain
weight were recorded. Results: Very highly significant (P ≤ 0.0001) differences were identified between agro
morphological parameters according to the type of submergence while the factor
type of immersion has significant influence on the number of internodes at 45
days after transplanting (P ≤ 0.01). The submergence was not significant effect
on tillering and length of internodes. Conclusion: The plant height, the weight
of thousand grains and the average number of empty grains per panicle
constitute key aspects and have been essential for evaluating tolerance to
submergence in Benin.
Cite this paper
Oteyami, M. , Codjia, E. , Agbangla, C. , Ahoton, L. , Santos, C. , Montcho, D. and Missihoun, A. (2018). Submergence Tolerance in Irrigated and Rainfed Lowland Rice Varieties: Agro-Morphological Basis for Rice Genetic Improvement in Southern Benin. Open Access Library Journal, 5, e4304. doi: http://dx.doi.org/10.4236/oalib.1104304.
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