• Improved Regrowth Salt Tolerance in Alfalfa

      Johnson, D. W.; Smith, S. E.; Dobrenz, A. K.; Ottman, Michael; Kingdon, Lorraine (College of Agriculture, University of Arizona (Tucson, AZ), 1989-09)
    • Progress in the Development of Salt Tolerance in Alfalfa

      McKimmie, T.; Dobrenz, A. K.; Malchow, P. L.; Ottman, Michael; Kingdon, Lorraine (College of Agriculture, University of Arizona (Tucson, AZ), 1989-09)
      Increasing crop salt tolerance can mean higher yields on irrigated farmland and salt -affected soils. Three cycles of selection were made for growth of alfalfa seedlings under 7500 ppm NaCl. Comparison of parent and selected populations was made for yield and germination under saline conditions. Yield of the last cycle was significantly improved. Germination of the last two cycles was higher than that of the parent and cycle 1.
    • Variability in Salt Tolerance within a Population of Alflafa

      McKimmie, T.; Dobrenz, A. K.; Ottman, Michael; Kingdon, Lorraine (College of Agriculture, University of Arizona (Tucson, AZ), 1989-09)
      Genetic variability must exist for a selection program to be successful. Alfalfa seedlings were selected for salt tolerance after six weeks growth at 7500 ppm NaCl. The selection criteria considered plant height and survival. Variability for each factor within a population of alfalfa was shown. Both criteria were important and facilitated selection from those parents which contributed most to the salt tolerance of the population.