In most tropical countries, there are local duck breeds that have been selected to suit local conditions. They may not perform as well as improved breeds, but they do have the ability to survive and produce well under local extensive and semi-intensive systems. Setioko (1997) described three Indonesian ducks: Tegal, Alabio and Bali. Improved genotypes have been introduced and have either been crossed with local ducks or remained reasonably pure. There was some concern about the ability of the improved genotypes to survive under traditional farming systems. Trials conducted in the Mekong River Delta by The Bin (1996) found.
