What's happening at IRRI

Thursday Seminar

Thursday, June 23, 2016, 01:15pm - 02:15pm


The physiology of drought-QTL pyramiding
Amelia Henry
Scientist II – Drought Physiology, CESD

Over the last few years, IRRI drought research has been successful in improving yield under drought, and several high-yielding, drought-tolerant varieties have been released in South and Southeast Asia and in East Africa. This has been achieved by crossing drought-tolerant traditional varieties with high-yielding but drought-susceptible modern varieties, selection based on grain yield under both drought and irrigated conditions, and identifying the regions of the genome (QTLs) responsible for yield under drought. In the drought physiology group, we have been working on identifying physiological mechanisms related with the drought-yield QTLs. Interestingly, each drought-yield QTL has shown a different combination of related traits, many of which appear to be drought-induced. Now, with the aim to further improve rice yield under drought, the drought breeding group has developed “QTL-pyramided” lines with multiple drought-yield QTLs in the same variety. From a physiology perspective, these newly developed genotypes allow us to test hypotheses on what QTLs and traits work best together to improve rice yield under drought. This seminar will present the progress achieved by dissecting the physiological mechanisms behind different pyramided combinations of drought-yield QTLs identified at IRRI.


Havener Auditorium, International Rice Research Institute, Los Baños, 4030 Laguna, Philippines