Thursday, December 13, 2012

Towards a Rational Use of African Rice (Oryza glaberrima Steud.) for Breeding in Sub-Saharan Africa


Abstract:
Africa Rice Center (AfricaRice) plays an important role in germplasm enhancement for their adaptation to different ecologies of upland, lowland, irrigated, mangrove and deep water. The genebank of AfricaRice contains over 20,000 rice accessions, notably two cultivated species (Oryza sativa and O. glaberrima) and wild species (O. longistaminata, O. barthii and O. stapfii), which are being used in breeding programs. In recent years, NERICA rice suitable for upland, lowland and irrigated ecologies were developed from O. glaberrima. For the better utilization of this material, characterization studies of genetic diversity have been made, especially in O. glaberrima using both molecular and conventional tools. The screening of this material for biotic and abiotic stresses has allowed us to identify firstly, genes for resistance to major rice diseases such as rice yellow mottle virus, rice blast disease and insect pests, and secondly, new sources of tolerance to drought, salinity and iron toxicity. A thorough exploitation of these resistance/tolerance genes will lead to rice varieties of better performance, under the heterogeneous production conditions in Africa. AfricaRice therefore planned to better exploit O. glaberrima and wild species conserved in it’s genebank through the use of biotechnology tools. Emphasis shall also be on the improvement of grain quality, nutritional values and post harvest techniques; this will greatly enhance the achievement of the objective of producing better quality rice in Africa. The objective of this paper is to propose several ways to better exploit O. glaberrima as breeding materials than the current interspecific breeding program through the critical review of published data and new additional data on the performance of NERICA lines.

Authors : 
Moussa Sié1*, Kayode Sanni1, Koichi Futakuchi1, Baboucarr Manneh2, Semon Mande3, Raymond Vodouhe4, Selome Dogbe1, Khady-Nani Drame1, Ayoni Ogunbayo1, Marie-Noelle Ndijiondjop1, Karim Traore2

1 Africa Rice Center (AfricaRice), 01 BP 2031 Cotonou, Benin
2 Africa Rice Center (AfricaRice), BP 96 Saint-Louis, Senegal
3 Africa Rice Center (AfricaRice), c/o International Institute of Tropical Agriculture (IITA), PMB 5320 Ibadan, Nigeria
4 Bioversity International, c/o IITA/Benin Research Station, 08 BP 0932 Cotonou, Benin
*Corresponding author:  m.sie@cgiar.org

Source : ResearchGate