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This article in CS

  1. Vol. 29 No. 5, p. 1195-1199
    Received: Oct 11, 1988

    * Corresponding author(s):


Seed Yield of Grazing-Tolerant Alfalfa Germplasms

  1. S. R. Smith  and
  2. J. H. Bouton
  1. Dep. of Agronomy, Univ. of Georgia, Athens, GA 30602



Alfalfa (Medicago sativa L.) cultivars tolerant to grazing usually have poor seed yields. This study compared grazing-tolerant alfalfa cultivars and germplasms to hay-type cultivars for seed yield in Georgia and determined the relationship of certain plant characters to seed yield. Hay-type (‘Apollo’ and ‘Florida 77’) and grazing-type (‘Spredor II’ and ‘Travois’) cultivars and two alfalfa germplasms selected for survival under continuous grazing in Georgia (GA-GC and GA-WCG) as well as the representative base populations of GA-WCG were established as replicated spaced plants for seed production over a 2-yr period. Measurements of raceme number, seeds per pod, and seed weight did not attain biologically significant correlations with seed yield. Grazing-tolerant germplasms, GA-GC and GA-WCG, produced seed and forage yields higher than the grazing-type cultivars and equivalent to the hay-type cultivars. Comparisons between GA-WCG and its base population indicate that seed and forage yields were maintained while the population was shifted toward a more decumbent growth habit and earlier fall dormancy. In this experiment alfalfa seed and forage yields were not sacrificed in the development of grazing-tolerant cultivars.

Research supported by state and Hatch funds allocated to the Georgia Agric. Exp. Stn.

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