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Articles by S. Sanyang
Total Records ( 1 ) for S. Sanyang
  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
  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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