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A Description and Interpretation of the NPGS Birdsfoot Trefoil Core Subset Collection

^a National Forage Seed Production Res. Cntr., USDA-ARS, 3450 SW Campus Way, Corvallis, OR 97331
^b USDA-ARS, Plant Genetics Research Unit, Columbia, MO 65211
^c National Temperate Forage Legume Germplasm Resources Unit, Prosser, WA 99350
^d Systematic Botany and Mycology Lab., Beltsville, MD 20705
^e Dep. of Agronomy, Univ. of Missouri, Columbia, MO 65211

View larger version (46K): [in a new window]   Fig. 1. Data analysis flow chart for interpreting the birdsfoot trefoil core subset collection.

View larger version (30K): [in a new window]   Fig. 2. Four birdsfoot trefoil core subset genetic diversity pools based on nine interpretive group plant descriptors by parsimony analysis.

View larger version (20K): [in a new window]   Fig. 3. The four flowering intensity rating classes used to classify the 48-accession birdsfoot trefoil core subset collection. The sub-figures A, B, C, and D correspond to Table 1 interpretive groups 1, 2, 3, and 4, respectively. Flowering intensity is a score of 1 to 5: 1, not flowering; 2, very few flowers; 3, few to moderate flowering; 4, moderate; and 5, intense flowering.