| CYTOLOGIC | Chromosome number | Chromosome number (x = 8) | 32 | 5 | ALFALFA.CHROMNUM.97.BRUMMER | PI 26590 90i SD | |
| DISEASE | Anthracnose | Percent of plants resistant to Anthracnose (Colletotrichum trifolii). | 2.2 | | ALFALFA.ANTHRAC.83.ELGIN | PI 26590 83i SD | Not Available |
| DISEASE | Bacterial wilt | Percent of plants resistant to Bacterial wilt. (Corynebacterium insidiosum). | 0 | | ALFALFA.BACTWILT.89.BARNES | PI 26590 83i SD | Not Available |
| DISEASE | Spring Black Stem | Disease reaction/rating to Spring Black Stem (Phoma medicaginis) using the Standard Test 1-5 rating scale. Data was taken on a 1 to 5 scale.
1 = Resistant : Healthy, symptom-free top growth
2 = Resistant : Small (<2mm), brown or black lesions or flecks; no defoliation
3 = Susceptible : Larger (2 to 3mm),disrete lesions; lesions may be on leaves and petioles; usually no chlorosis or defoliation
4 = Susceptible : Large (>3mm) lesions; no defoliation;petiole lesions
5 = Susceptible : Lesions > 3mm, fruiting; dead leaves or defoliation | 3.71 | | ALFALFA.SPRBLSTEM.84.LEATH | PI 26590 83i SD | Not Available |
| DISEASE | Common leaf spot | Percent of plants resistant to Common Leaf spot (Pseudopeziza medicaginis). | 4.52 | | ALFALFA.LEAFSPOT.84.LEATH | PI 26590 83i SD | Not Available |
| DISEASE | Verticillium wilt | Percent of plants resistant to Verticillium wilt (Verticillium albo-atrum). | 6 | | ALFALFA.VERTWILT.84.PEADEN | PI 26590 83i SD | Not Available |
| DISEASE | Fusarium wilt | Percent of plants resistant to Fusarium wilt (Fusarium oxysporum). | 53.89 | | ALFALFA.FUSWILT.85.BARNES | PI 26590 83i SD | Not Available |
| DISEASE | Lepto spot | Percent of plants resistant to Lepto Spot (Leptosphaerulina briosiana). | 3.71 | | ALFALFA.LEPTOSPOT.84.LEATH | PI 26590 83i SD | Not Available |
| DISEASE | Downy mildew | Percent of plants resistant to Downy mildew (Peronospora trifoliorum). | 0 | | ALFALFA.DOWNYMILD.I7.84.STUT | PI 26590 83i SD | Not Available |
| DISEASE | Downy mildew | Percent of plants resistant to Downy mildew (Peronospora trifoliorum). | 14.3 | | ALFALFA.DOWNYMILD.I8.84.STUT | PI 26590 83i SD | Not Available |
| DISEASE | Stemphylium Leaf spot | Disease reaction/rating to Stemphylium Leaf Spot (Stemphylium botryosum) using the Standard Test 1-5 rating scale. Data was taken on a 1 to 5 scale.
1 = Resistant : Healthy, symptom-free top growth
2 = Resistant : Small (<1mm) brown or black lesions or pepper spots; no defoliation
3 = Susceptible : Larger (1 to 3mm), discreet lesions with necrotic centers; usually no chlorosis or defoliation
4 = Susceptible : Larger (>3mm), target-type lesions or necrotic areas; may have petiole lesions
5 = Susceptible : Lesions > 3mm, chlorosis, defoliation | 4.26 | | ALFALFA.STEMPHLFSP.84.LEATH | PI 26590 83i SD | Not Available |
| DISEASE | Sclerotinia resistance | Percent resistant plants to Sclerotinia. | 6.8 | | ALFALFA.SCLEROT.93.RHODES | PI 26590 83i SD | Not Available |
| INSECT | Pea Aphid | Percent of seedling survival after pea aphid damage. (Acrythosiphon pisum). | 47.2 | | ALFALFA.PEAAPHID.86.MANG | PI 26590 83i SD | Not Available |
| INSECT | Potato Leafhopper | Percent of plant foliage yellowed by Potato Leafhopper (Empoasca fabae). | 1.9 | | ALFALFA.POTLEAFHOP.85.BYERS | PI 26590 83i SD | Not Available |
| INSECT | Spotted Alfalfa Aphid | Percent of seedling survival after Spotted Alfalfa aphid damage (Therioaphis maculata). | 20.4 | | ALFALFA.SPOTALFAPH.86.MANG | PI 26590 83i SD | Not Available |
| INSECT | Blue aphid | Percent of seedling survival after Blue aphid damage. (Acyrthosiphon kondoi). | 0.5 | | ALFALFA.BLUEAPHID.85.CADDEL | PI 26590 83i SD | Not Available |
| INSECT | Clover Root curculio | Percent of plants resistant to Clover Root Curculio (Sitonia hispidulus). | 33.73 | | ALFALFA.ROOTCURC.87.BYERS | PI 26590 83i SD | Not Available |
| MORPHOLOGY | Seed weight 100 | Weight of 100 seeds in grams. | 0.25 | | ALFALFA.SEEDWEIGHT.WRPIS | PI 26590 90i SD | |
| PRODUCTION | Seed productivity | Seed productivity. coded 1-9. | 9 - LOW | | ALFALFA.SEEDPROD.90.PEADEN | PI 26590 90i SD | |
| STRESS | Acid soil tolerance | Ratio of root dry weight below 1 inch in acid soil to root dry weight below 1 inch in lime soil. Data is compared to an acid tolerant check. | 0.93 | | ALFALFA.ACIDSOIL.92.BOUTON | PI 26590 90i SD | |