ZURICH, March 18 (Reuters) - The new Swiss national airline is holding alliance talks only with Oneworld, having ended discussions with the other two global airline groupings, industry executives said on Monday. Swiss is the brand name of the company which is due to take off on March 31 to fly two-thirds of the destinations previously operated by failed flag carrier Swissair (SWSZn) as well as continuing its short and medium-haul services previously flown by predecessor Crossair (CROZn). Its choice of the Oneworld alliance grouping led by British Airways Plc (BAY) and AMR Corp's (AMR) American Airlines is expected to be made public at a March 26 news conference in Zurich. A Oneworld linkup would mean an extension of the transatlantic ties that existed between the two Swiss airlines and American. But it is unclear to what extent the dissolving Qualiflyer alliance -- Swissair's attempt to lead a fourth global grouping -- would be integrated into Oneworld. A spokesman for Lufthansa (LHAG), part of the rival Star Alliance grouping, told Reuters: "There are no talks any more between the Star Alliance and Swiss/Crossair." An industry source said SkyTeam saw only limited advantages to Swiss's membership and was not interested. Oneworld spokesman Michael Blunt said: "We cannot comment on any talks we may have with potential alliance members." A Crossair spokesman said: "The talks are being held at the highest level and we are making no comment on their progress." In Paris, a spokeswoman at Air France (AIRF) said it was up to Swiss to say whether or not there were talks about the Swiss airline joining its SkyTeam alliance. ONEWORLD Oneworld is an alliance of eight airlines: American, British Airways, Aer Lingus [AERL.UL], Cathay Pacific Airways Ltd (0293), Iberia (IBLA), Finnair (FIA1S), LanChile (LAN) and Qantas (QAN). The Qualiflyer alliance, started in 1998, currently only exists as a frequent flyer programme while all members are reviewing their options for the future. It is a mixed bag of companies working under financial strains such as DAT Belgian Airlines, which is the successor to failed Belgian carrier Sabena; LOT Polish Airlines [LOT.UL]; Portugalia Airlines, TAP-Air Portugal [TAPA.UL], and Volare. Swiss Chairman Piet Bouw last week told a business meeting that the advantages of working with Star were less than those of cooperating with SkyTeam and Oneworld. He added the potential for cooperation with American was a little bit greater than with Delta Air Lines Inc (DAL), "but substantially larger than working together with United Airlines (UAL)." LIMITED ADVANTAGES FOR SKYTEAM Star Alliance includes Germany's Lufthansa, Scandinavian Airlines System(SAS), British Midland Airways [BMID.UL], Austrian Airlines (AUAV), Lauda (LAUV) and Tyrolean. In North America it has UAL Corp (UAL) unit United Airlines and Air Canada (SIAL), Thai Airways (THAI), Air New Zealand Ltd (AIRVA) and Ansett Australia [ATI.UL]. In Latin America it has Varig (VAGV3) and Mexicana. The SkyTeam involves Air France, Delta Air Lines, Alitalia (AZPIa), Korean Air (03490), Aero Mexico and Czech Airlines. A number of major airlines are not fully allied yet, such as KLM (KLM) and its transatlantic partner Northwest Airlines Corp (NWAC).