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Soybean Genetics Newsletter

Abstract

The extension of soybean cultivation in the south part of Europe is limited by climatic conditions and, above all, by drought appearing each year during summer, in a time which is a critical period for water supply of soybeans: the grain and pod filling stages (Mingeau , 1975). By action of this drought, grain yields may decrease drastically. As irrigation is often impossible, one of the most important breeding objectives in France is drought tolerance . Although water relations of ten should be studied in soybeans , varietal differences were rarely investigated except by Mederski and Jeffers (1973) and Sammons et al. (1978 , 1979).

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