The Philippines-based International Rice Research Institute (IRRI) is developing a new variety of rice, "3-in-1"climate tolerant rice, which can tolerate flooding, a prolonged dry season, and saltiness near coastal areas, according to local sources.
According to the IRRI, the new variety will be a climate-resilient variety and help mitigate climate change and sustain agricultural productivity in rice-producing countries. The IRRI first developed the “2-in-1” variety, which could tolerate flooding and drought situations.
Flood resistant variety "IR 64 Sub1" was derived from an Indian rice variety. Scientists isolated the SUB 1A gene and identified the genetic code that controls submergence tolerance. The SUB 1A gene activates when the plant is submerged, making it dormant and conserving energy until the floodwater recedes. The "IR 64 Sub1" can tolerate flooding for 14 days and still can produce an average yield of 6.4 tons per hectare.
The drought-tolerant variety "Sahod ulan" was derived from the Indian variety "Sahbhagi Dhan" and the Nepal variety "Sookha Dhan". The IRRI scientists identified quantitative trait loci (QTLs) genes which give the drought-tolerance and improve yield. These are activated in popular varieties like IR64 to produce better yields even in drought conditions.
Now the IRRI is in its last stage of developing the "3-in-1" variety. It is developing seeds that have genes that can sustain climatic changes and yet provide good yields. IRRI's Deputy Director General says IRRI is working closely with the Philippines Department of Agriculture and the Philippine Rice Research Institute (Philrice) to help the government attain its rice self-sufficiency target. The IRRI promises technology support to the Philippines to accelerate high-yielding varieties, he adds.
Courtesy : http://oryza.com/news/research-development/irri-developing-%E2%80%983-1%...