Submitted on: 17 June 2005.
Revised on: 19 July 2005.
Accepted on: 24 August 2005.
___________________EUPHYTICA---SPRINGER
Submitted on: 23 September 2010.
Revised on: 16 October 2010.
Accepted on: 11 December 2010.
___________________EUPHYTICA---SPRINGER
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Submitted on: 21 August 1999.
Revised on: 11 October 1999.
Accepted on: 29 October 1999.
___________________EUPHYTICA---SPRINGER
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