1. Homero 1337, Col. Polanco11550MexicoD. F.Mexico
2. Cereal ProgramThe Int. Center for Agric. Res. in the Dry Areas (ICARDA)P.O. Box: 5466AleppoSyria
3. Dep. of Plant Breeding and Biometry252 Emerson Hall, Cornell Univ.IthacaNY14853
4. MonneveuxENSA‐INRA, Genetique et Amelioration des plantes2 Place Viala, 34060 Montpellier Cedex 01France