Generating new germplasm of alfalfa by transgenic technology has become important in forage breeding. Using a T0 generation of transgenic plants with betaine aldehyde dehydrogenase (BADH) gene as testing material, we tested the resistance to salt. The transgenic grass biomass was higher than that of the non-transgenic control in different salt soils. Dry grass production was higher by 13.11% to 24.98% in the transgenic cultivar than in the control. The betaine aldehyde dehydrogenase gene was stably expressed and inherited, suggesting that this transgenic line can be used for further breeding.
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