ALFALFA

Descriptors
Category: CHEMICAL
  1. By pass protein (PROTEIN BYPASS) In-vitro dry matter disappearance (ivdmd) expressed as a percent of the cultivar venal. Higher than 100% suggests low digestibility & higher by-pass protein.
  2. Crude protein in the leaf (PROTEIN LEAF) Crude protein in the leaf.
  3. Crude protein in the stem (PROTEIN STEM) Crude protein in the stem
Category: CYTOLOGIC
  1. Chromosome number (CHROMOSOME) Chromosome number (x = 8)
Category: DISEASE
  1. Anthracnose (ANTHRACNOSE) Percent of plants resistant to Anthracnose (Colletotrichum trifolii).
  2. Aphanomyces (APHANOMYCES) Percent resistant plants to Aphanomyces eutieches.
  3. Bacterial wilt (BACTERIAL WILT) Percent of plants resistant to Bacterial wilt. (Corynebacterium insidiosum).
  4. Downy mildew (DOWNY MILDEW) Percent of plants resistant to Downy mildew (Peronospora trifoliorum).
  5. Fusarium wilt (FUSARIUM WILT) Percent of plants resistant to Fusarium wilt (Fusarium oxysporum).
  6. Common leaf spot (LEAF SPOT) Percent of plants resistant to Common Leaf spot (Pseudopeziza medicaginis).
  7. Lepto spot (LEPTO SPOT) Percent of plants resistant to Lepto Spot (Leptosphaerulina briosiana).
  8. Phytophthora root rot (PHYTOPHTHORA ROOT ROT) Percent of plants resistant to Phytophthora Root rot (Phytophthora megasperma).
  9. Resistance to Rhizoctonia (RHIZOCTONIA) Percent resistance to Rhizoctonia.
  10. Sclerotinia resistance (SCLEROTINIA) Percent resistant plants to Sclerotinia.
  11. Spring Black Stem (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

  12. Stemphylium Leaf spot (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

  13. Verticillium wilt (VERTICILLIUM WILT) Percent of plants resistant to Verticillium wilt (Verticillium albo-atrum).
Category: GROWTH
  1. Crown stem diameter (CROWN STEM DIAMETER) Diameter of the crown stem
  2. Crown width (CROWN WIDTH) Width of the crown
  3. Secondary root diameter (DIAMETER SECONDARY ROOTS) Secondary root diameter
  4. Fall growth (FALL GROWTH) Fall growth evaluated by plant height on October 11-12.
  5. Plant growth habit (GROWTH HABIT) Plant growth habit evaluated during the mid stage of the second regrowth (August 8-9).
  6. Recovery rate (RECOVERY RATE) Recovery rate visually estimated 2 weeks after the first spring cutting (mid July).
  7. Seedling vigor (SEEDLING VIGOR) Seedling vigor visually estimated as plant size during the fourth week after germination.
  8. Taproot diameter (TAPROOT DIAMETER) Diameter of the taproot
Category: INSECT
  1. Alfalfa Snout beetle (ALFALFA SNOUT BEETLE) Resistance/tolerance to Alfalfa Snout Beetle (Otiorhynchus ligustic) root feeding
  2. Blue aphid (BLUE APHID) Percent of seedling survival after Blue aphid damage. (Acyrthosiphon kondoi).
  3. Clover Root curculio (CLOVER ROOT CURCULIO) Percent of plants resistant to Clover Root Curculio (Sitonia hispidulus).
  4. Lygus bug (LYGUS BUG) Resistance to lygus bug
  5. Pea Aphid (PEA APHID) Percent of seedling survival after pea aphid damage. (Acrythosiphon pisum).
  6. Potato Leafhopper (POTATO LEAF HOPPER) Percent of plant foliage yellowed by Potato Leafhopper (Empoasca fabae).
  7. Spotted Alfalfa Aphid (SPOTTED ALFALFA APHID) Percent of seedling survival after Spotted Alfalfa aphid damage (Therioaphis maculata).
Category: MOLECULAR
  1. Chloroplast DNA hypervariabili (GENETIC DISTANT) Chloroplast DNA hypervariability. The average distance relative to all other measured. Other data downloadable as Excel:135 by 135 matrix and Genetic distance between 2 accessions(8972 combinations)- click on Chloroplast DNA hypervariabili
Category: MORPHOLOGY
  1. Crown branching (CROWN BRANCHING) Branching of the crown
  2. Crown bud number (CROWN BUD NUMBER) Number of crown buds
  3. Depth of the crown (CROWN DEPTH) Depth of the crown
  4. Crown origin (CROWN ORIGIN) Origin of the crown
  5. Determinate taproot percentage (DETERMINATE TAPROOT PERCENTAGE) Determinate taproot percentage
  6. Determinate taproot position (DETERMINATE TAPROOT POSITION) Determinate taproot position
  7. Fibrous root mass (FIBROUS ROOT MASS) Fibrous root mass
  8. Flower color (FLOWER COLOR) Flower color.
  9. Leaf size (LEAF SIZE) Leaf size visually estimated on August 30.
  10. Secondary root number (SECONDARY ROOT NUMBER) Number of secondary roots
  11. Secondary root position (SECONDARY ROOT POSITION) Secondary root position
  12. Seed weight 100 (SEED WEIGHT100) Weight of 100 seeds in grams.
  13. Unifoliate internode length (UNIFOLIATE INTERNODE LENGTH) Unifoliate internode length - the distance between the cotyledonary node and the unifoliate leaf node measured in millimeters.
Category: OTHER
  1. Image/picture1 (IMAGE-1) A picture or image
  2. Image/picture2 (IMAGE-2) A picture or image
  3. Image/picture3 (IMAGE-3) A picture or image
Category: PHENOLOGY
  1. Days to maturity (DAYS PLANT TO MATURITY) Number of days between the first and second cut
  2. Maturity (MATURITY (CODED)) Visual estimate of the morphological stages of development.
Category: PRODUCTION
  1. Leaf acid detergent fiber (ADF LEAF) Acid detergent fiber of the leaf taken at maturity
  2. Stem acid detergent fiber (ADF STEM) Acid detergent fiber of stem taken at maturity
  3. Leaf neutral detergent fiber (NDF LEAF) Neutral detergent fiber of leaf taken at maturity
  4. Stem neutral detergent fiber (NDF STEM) Neutral detergent fiber of stem taken at maturity
  5. Seed productivity (SEED PRODUCTION) Seed productivity. coded 1-9.
  6. Seedling year yield (SEEDLING YEILD) Seedling year yield measured in grams of dry matter per plot.
  7. Stem leaf ratio (STEM LEAF RATIO) Stem leaf ratio
Category: STRESS
  1. Acid soil tolerance (ACID SOIL) 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.
  2. Frost damage (FROST DAMAGE) Frost damage visually estimated on October 10, after a severe frost during the last week of September.
  3. Salt germination - ic(50) valu (SALT GERMINATION) Sodium chloride concentration which inhibits germination of 50% of the viable seed.
  4. Tolerance to salt stress (SALT STRESS) The ratio of mean regrowth amount under salt stress to that produced under non-stress conditions expressed as a proportion of the ratio for a control cultivar(s).
  5. Winter injury (WINTER INJURY) Winter injury visually evaluated for damage and death.
Category: SUBSET
  1. Alfalfa standard checks (CHECKS) Standard Checks used to characterize alfalfa cultivars
  2. Core subset (CORE) A flag to indicate the accession is part of the core subset