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Maize
Descriptors
Category: Characterization
  1. 100 Seeds weight (100SEEDSWEIGHT) 100 Seeds weight
  2. Adaptation (Adaptation) Material Adaptation Qualification
  3. Adventitious Roots (AdventitiousRoots) Adventitious Roots
  4. Agronomic Scale (AgronomicScale) Agronomic Scale
  5. Cob Color 1 (CobColor1) Cob Color 1
  6. Cob Color 2 (CobColor2) Cob Color 2
  7. Cob Color 3 (CobColor3) Cob Color 3
  8. Days To Anthesis (DaysToAnthesis) Days To Anthesis
  9. Days To Silking (DaysToSilking) Days To Silking
  10. Density (Density) Planting density for the regeneration trial
  11. Ear Diameter (EarDiameter) Ear Diameter
  12. Ear Height (EarHeight) Ear Height
  13. Ear Length (EarLength) Ear Length
  14. Ear number from latteral nodes (EARNUMBERFROMLATTERALNODES) Ear number from latteral nodes
  15. Ear Rot (EarRot) Ear Rot
  16. Ear Shape (EarShape) Ear Shape
  17. Ear Sheath 1 (EarSheath1) Ear Sheath 1
  18. Ear Sheath 2 (EarSheath2) Ear Sheath 2
  19. Ear Sheath 3 (EarSheath3) Ear Sheath 3
  20. Easy Shelling (EasyShelling) Easy Shelling
  21. Effective Population (EffectivePopulation) Effective population expressed as plants per hactare in the regeneration trial
  22. Eliminated plants (ELIMINATEDPLANTS) Eliminated plants
  23. Female flowering (FEMALEFLOWERING) Female flowering
  24. Field book status (Fieldbookstatus) Code to identify the status of current field book
  25. Field Germination (FieldGermination) Germination rate observed in the field for the accession
  26. Field Moisture (FieldMoisture) Field Moisture
  27. Field Weight (FieldWeight) Ear weight obtained in the experimental plot
  28. GDU Anthesis (GduAnthesis) Grade-day units between planting and anthesis dates
  29. GDU Silking (GduSilking) Grade-day units between planting and silking dates
  30. Glume Size (GlumeSize) Code to identify glume size
  31. Grade Disease 1 (GradeDisease1) Grade of the desease
  32. Grade Disease 2 (GradeDisease2) Grade of the desease
  33. Grade Disease 3 (GradeDisease3) Grade of the desease
  34. Grain Color 1 (GrainColor1) Predominant grain color for the accession
  35. Grain Color 2 (GrainColor2) Grain color for the accession less frequent than grain color 1
  36. Grain Color 3 (GrainColor3) Grain color for the accession less frequent than grain color 2
  37. Grain Color 4 (GrainColor4) Grain color for the accession less frequent than grain color 3
  38. Grain Color 5 (GrainColor5) Grain color for the accession less frequent than grain color 4
  39. Grain Color 6 (GrainColor6) Grain color for the accession less frequent than grain color 5
  40. Grain Length (GrainLength) Grain Length
  41. Grain Type 1 (GrainType1) Predominant grain type for the accession
  42. Grain Type 2 (GrainType2) Grain type for the accession less frequent than grain type 1
  43. Grain Type 3 (GrainType3) Grain type for the accession less frequent than grain type 2
  44. Grain Width (GrainWidth) Grain width
  45. Harvest Date (HarvestDate) Harvest Date
  46. Height of Plant (HEIGHTOFPLANT) Height of Plant
  47. Height of the first ear (HEIGHTOFTHEFIRSTEAR) Height of the first ear
  48. High of the Height Ear (HIGHOFTHEHEIGHTEAR) High of the Height Ear
  49. Husk Cover (HuskCover) Code to identify grade of husk cover
  50. Kernel number in Ear (KERNELNUMBERINEAR) Kernel number in Ear
  51. Kernel Row Number (KernelRowNumber) Kernel Row Number
  52. Kernel Row Type (KernelRowType) Code to identify kernel row type
  53. Leaf Disease 1 (LeafDisease1) Code to identify leaf disease pathogen
  54. Leaf Disease 2 (LeafDisease2) Disease of the leaf
  55. Leaf Disease 3 (LeafDisease3) Disease of the leaf
  56. Leafiness (Leafiness) Code to identify grade of leafiness
  57. Leaves Above (LeavesAbove) Number of leaves above the ear
  58. Leave Senescence (LeaveSenescence) Leave Senescence
  59. Length of leaf (LENGTHOFLEAF) Length of leaf
  60. Length of side brench (LENGTHOFSIDEBRENCH) Length of side brench
  61. Long brench (LONGBRENCH) Long brench
  62. Long of tassel (LONGOFTASSEL) Long of tassel
  63. Long of the internal main brench (LONGOFTHEINTERNALMAINBRENCH) Long of the internal main brench
  64. Long of the main brench (LONGOFTHEMAINBRENCH) Long of the main brench
  65. Male flowering1 (MALEFLOWERING1) Male flowering1
  66. Male flowering2 (MALEFLOWERING2) Male flowering2
  67. Male flowering3 (MALEFLOWERING3) Male flowering3
  68. Maturity (Maturity) Seed maturity
  69. NPK 1 (NPK1) Nitrogen fertilizer amount used in the regeneration trial
  70. NPK 2 (NPK2) Phosphorus fertilizer amount used in the regeneration trial
  71. NPK 3 (NPK3) Potassium fertilizer amount used in the regeneration trial
  72. Number Ear Rot (NumberEarRot) Number Ear Rot
  73. Number Ears (NumberEars) Number of ears per planting
  74. Increment number (NumberIncreases) Number of times the accession has been increased
  75. Number of ears in stem (NUMBEROFEARSINSTEM) Number of ears in stem
  76. Number of lateral brenchs (NUMBEROFLATERALBRENCHS) Number of lateral brenchs
  77. Number of leafs (NUMBEROFLEAFS) Number of leafs
  78. Number Regenerations (NumberRegenerations) Number of times the accession has been regenerated
  79. Pedicel length (PEDICELLENGTH) Pedicel length
  80. Plant Color 1 (PlantColor1) Predominant plant color for the accession
  81. Plant Color 2 (PlantColor2) Plant color for the accession less frequent than plant color 1
  82. Plant Color 3 (PlantColor3) Plant color for the accession less frequent than plant color 2
  83. Plant Height (PlantHeight) Plant Height
  84. Planting Date (PlantingDate) Planting Date
  85. Plants Per Plot (PlantsPerPlot) Number of plants per experimental plot
  86. PlantsPollinated (PlantsPollinated) Number of plants that are pollinated
  87. Previous Location (PreviousLocation) Name of the location in which the accession was previoulsy regenerated or increased
  88. Previus Planting Date (PreviousPlantingDate) Previus Planting Date
  89. Previous PlotNumber Environ (PreviousPlotNumberEnviron) Previous PlotNumber Environ
  90. Previous PlotNumber Experiment (PreviousPlotNumberExperiment) Previous PlotNumber Experiment
  91. Previous PlotNumber Sequence (PreviousPlotNumberSequence) Previous PlotNumber Sequence
  92. PrimaryPurity (PrimaryPurity) Purity of the primary race (Scale of 0-9). This refers to the level of purity of the Primary Race assigned to the accession.
    Purity = 0: Accession has not the characteristics of the landrace, or is of low quality.
    Purity = 9: Accession shows all of the characteristics that describe the landrace, in a high-quality form.
  93. Primary Race (PrimaryRace) Primary race for the accession. Predominant landrace classified by overall phenotype.
  94. Root Development (RootDevelopment) Code to identify the grade of root development
  95. Root Lodged (RootLodged) Root Lodged
  96. Root Lodged % (RootLodged%) Percent of root lodging
  97. Secondary Race (SecondaryRace) Secondary race for the accession. In cases where it is evident that there has been a mixture of two landraces, the dominant one is the primary.
  98. Seedling Vigor (SeedlingVigor) Code to identify plant seedling vigor
  99. Sheath Pubescence (SheathPubescence) Code to identify grade of sheath pubescens
  100. Side brench length (SIDEBRENCHLENGTH) Side brench length
  101. Stalk Lodged (StalkLodged) Stalk Lodged
  102. Stalk Lodged % (StalkLodged%) Percent of stalk lodging
  103. Tassel length (TASSELLENGTH) Tassel length
  104. Tassel number of brench (TASSELNUMBEROFBRENCH) Tassel number of brench
  105. Tassel Type (TasselType) Code to identify tassel type
  106. Tillering Plant Teocinte (TILLERING_PLANT_TEOCINTE) Tillering Plant Teocinte
  107. Tillering Plant (TilleringPlant) Tillering Plant
  108. Tiller nodes number (TILLERNODESNUMBER) Tiller nodes number
  109. Tiller number (TILLERNUMBER) Tiller number
  110. Vigor (Vigor) Code that indicates vigor for the collected accession
  111. Width of leaf (WIDTHOFLEAF) Width of leaf
  112. Width of tassel (WIDTHOFTASSEL) Width of tassel
Category: GEO-REFERENCE
  1. Adaptation Zone (AdaptationZone) Adaptation Zone
  2. Elevation Meters 1 (ElevationMeters1) Elevation of the location from where the accession originates
  3. Elevation Meters 2 (ElevationMeters2) Elevation of the location from where the accession originates. Allows recording alternative elevation data
  4. Elevation Meters 3 (ElevationMeters3) Elevation of the location from where the accession originates. Allows recording alternative elevation data
  5. Elevation Type 1 (ElevationType1) Source from where elevation data was obtained
  6. Elevation Type 2 (ElevationType2) Source from where elevation data was obtained. Allows recording of alternative elevation type
  7. Elevation Type 3 (ElevationType3) Source from where elevation data was obtained. Allows recording of alternative elevation type
Category: Identifiers
  1. Designation Date (DesignationDate) Date in which the accession was designated under FAO in-trust agreement
  2. Designation Org (DesignationOrg) Indicates if accession is under FAO in-trust agreement
Category: SUBSET
  1. Expandability (Expandability) Expandability (expansion volume divided by initial weight of grain)
  2. Expansion Volume (milliliters) (ExpansionVolume(milliliters)) Volume of 30 grams of popped kernels (milliliters)
  3. Final Weight (grams) (FinalWeight(grams)) Grain weight after removal from the controlled environment chamber (grams)
  4. Flake color (Flakecolor) Color of the popcorn flake (expanded endosperm)
  5. Flake shape (Flakeshape) Shape of the popcorn flake (Scale of 1-5)
  6. Initial Weight (grams) (InitialWeight(grams)) Kernel weight before placing the sample in pre-conditioning chamber
  7. Kernel number in 30 grams (Kernelnumberin30grams) Number of kernels in 30 grams (initial weight)
  8. Number of unpopped kernels (Numberofunpoppedkernels) Number of kernels not popped after microwaving
  9. Percent unpopped kernels (Percentunpoppedkernels) Percent of unpopped kernels
  10. Pericarp retention (Pericarpretention) Amount of Pericarp retained after popping (Scale of 1-5)
  11. Time to first pop (seconds) (Timetofirstpop(seconds)) Elapsed time to first popping event in microwave oven (seconds)
  12. Weight of unpopped kernels (grams) (Weightofunpoppedkernels(grams)) Weight of unpopped kernels (grams)


CIMMYT Germplasm Policy (excerpts)

CIMMYT holds and manages its germplasm as an international public good and is committed to its widespread and facilitated diffusion and use to achieve the maximum possible access, scale, scope of impact, and sharing of benefits for the poor, especially maize and wheat farmers and consumers in developing countries. To safeguard its international public goods character, and by legal obligation with FAO and the Governing Body of the International Treaty of Plant Genetic Resources for Food and Agriculture (ITPGRFA), CIMMYT germplasm for use in food and agriculture is transferred using the Standard Materials Transfer Agreement (SMTA) of the ITPGRFA or equivalent Material Transfer Agreements (MTAs) in the case of species that are not listed in the Annex 1 of the ITPGRFA.

Distributions to fulfill requests for repatriation of subsamples of germplasm collections to a country or community of origin, especially following natural or man-made catastrophes, are considered a high priority.

The CIMMYT germplasm research for development focus is on (i) conservation and the effective use of genetic diversity and (ii) the further development and deployment of CIMMYT germplasm for the benefit of improved and more sustainable food and nutrition security, poverty reduction, and environmental sustainability.

CIMMYT strives to make CIMMYT held germplasm, as well as the data and other outputs resulting from its germplasm research and development activities, openly available and accessible for research, breeding and training for food and agriculture, in accordance with the ITPGRFA, the CGIAR Intellectual Assets Principles, the CGIAR Open Access and Data Management Policy and CIMMYT's Intellectual Assets Policy. Germplasm availability is made public through the web, field days etc. and access is free of charge or at minimal cost. CIMMYT may apply additional conditions to the transfer of germplasm under development from its breeding and research programs in support of accelerated use, data sharing, and impact assessment.

CIMMYT acquires and distributes all seed samples in accordance with relevant international and national regulations, such as phytosanitary/quarantine laws, ITPGRFA or CBD, and national laws for genetic resources access, transgenic status, and other considerations. Germplasm imported, exported, or acquired from quarantined regions within the same country must pass through the applicable quarantine processes implemented by an accredited CIMMYT Seed Health Unit or the importing or exporting countries' dedicated authorities, as well as meeting all necessary regulatory requirements, before acceptance and use by CIMMYT for conservation, breeding, research, and/or dissemination to third parties.

CIMMYT makes no warranties, express or implied, regarding the quality, viability or purity (genetic or mechanical), safety of and/or use of CIMMYT-held germplasm including any warranty of merchantability, or fitness for a particular purpose, including without limitation, production, breeding, crossing, testing, commercialization, or non-infringement of third-party intellectual property.