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Regional Yield Evaluation of the Interspecific Hybrids (O. glaberrimax O. sativa) and Intraspecific (O. sativa x O. sativa) Lowland Rice |
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M. Sie,
Y. Sere,
S. Sanyang,
L.T. Narteh,
S. Dogbe,
M.M. Coulibaly,
A. Sido,
F. Cisse,
E. Drammeh,
S.A. Ogunbayo,
L. Zadj,
B. Ndri and B. Toulou |
Abstract:
The immense potential of the lowlands in West and Central Africa for
durable intensification of rice cropping have not been realised due to
biotic and abiotic constraints. There is a need to replace existing rice
varieties with others that are better adapted to the lowland conditions.
After the success of the upland interspecific varieties, Africa Rice Center
(WARDA) and its partners developed NERICA varieties suitable for irrigated
and rainfed lowlands. The stable varieties resulting from this work were
evaluated under preliminary yield trials in eight countries at 19 sites.
The entries included 61 interspecific (O. glaberrima x O. sativa
indica) varieties and 9 intraspecific (O. sativa indica
x O. sativa indica) varieties. The aim of the study is to introduce
new lowland NERICAs through a participatory approach and to identify ideotypes
that are adapted to lowland conditions. Variations did exist among the
73 rice varieties with respect to the five traits that were evaluated.
Total number of tillers, panicle number and flowering dates were observed
to greatly influence the yield among the 73 varieties that were evaluated.
A principal components plot clustering analysis were used to group the
accessions. The interspecific varieties formed the most interesting group
and have a better capacity for adaptation to the diversity of lowlands.
They have acceptable yields, sometimes higher than those of intraspecific
varieties and checks. Thus, most lowland NERICAs varieties tested in three
ecologies could produce more than 5 t ha-1. The results obtained
were quite encouraging and showed that, the varieties possess good agronomic
traits that are well adapted to intensified lowland rice farming. The
recent naming of some of these interspecific varieties as NERICA-L (New
Rice for Africa Lowland) by Africa Rice Center has confirmed that they
compare well with the traditional varieties. Thus, from this study, we
now have a new set of interspecific varieties that are adapted to lowland
conditions and which the national research programs can use in various
tests for satisfying farmers` needs.
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How to cite this article:
M. Sie, Y. Sere, S. Sanyang, L.T. Narteh, S. Dogbe, M.M. Coulibaly, A. Sido, F. Cisse, E. Drammeh, S.A. Ogunbayo, L. Zadj, B. Ndri and B. Toulou, 2008. Regional Yield Evaluation of the Interspecific Hybrids (O. glaberrimax O. sativa) and Intraspecific (O. sativa x O. sativa) Lowland Rice. Asian Journal of Plant Sciences, 7: 130-139.
DOI: 10.3923/ajps.2008.130.139
URL: https://scialert.net/abstract/?doi=ajps.2008.130.139
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