Stresses‎ > ‎

Cold


  • Objective: Cold-tolerant rice - identify the best sources of cold tolerance, elucidate the genetic control, and develop and test improved tolerant varieties under farmers’ and improved management practices.
Research progress

Inventory of existing cold-tolerant germplasm completed and screening protocol developed

A total of 170 cold-tolerant lines were identified and seeds were acquired from IRRI and multiplied through the International Network for Genetic Evaluation of Rice (INGER)-Africa. Additional materials from AfricaRice and nominations from Madagascar, Ethiopia, Mali, Rwanda, and IRRI have also been multiplied. Off-season seed multiplication of cold-tolerant germplasm for highlands (japonica types) is under way at Hembeti, Morogoro, in Tanzania. The IRRI protocol for cold-tolerance screening in the screenhouse (cold-water tank method) and in the field was adopted and is being established for irrigated lowland conditions in Senegal and for high-altitude areas in Tanzania. In Tanzania, a screenhouse is being renovated for this purpose at the Sokoine University of Agriculture (SUA), Morogoro, in collaboration with the Horticulture Unit, Department of Crop Science and Production of SUA. In the field, planting-date trials with cold stress coinciding with either the early vegetative stage or reproductive stage are being conducted at Ndiaye, Senegal. 



Suitable cold-affected screening sites identified for irrigated systems in Senegal and Mali, and for high-altitude sites in Rwanda, Ethiopia, and Madagascar

Suitable trial sites for on-station and on-farm trials for cold stress have been identified in Ethiopia (Adet, Holetta, and Jimma), Rwanda (Ntendezi, Cyili, Rwamagana, and Rutendeli), and Madagascar (Antsirabe and Mahitsy) for high-altitude screening and in Senegal (Ndiaye and Fanaye) and Mali (Kogoni) for irrigated systems.