Germplasm, Seed Lots, and Packages

Owned by Heide Mae Balcera (Unlicensed)
Last updated: May 12, 2023 by Stephanie Edora Manrilla
2 min read

 

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The EBS has three levels of information about germplasm:

  1. Germplasm

  2. Seed lot

  3. Package

Germplasm

 

Germplasm is the highest level concept. A germplasm record can refer to:

  • A new F1 cross

  • A segregating F3 “line”

  • A fixed doubled haploid line

  • A landrace accession from the germplasm bank

  • A single seed in a single-seed descent breeding pipeline

  • . . . or any other kind of germplasm

Seed Lots

Whenever germplasm is harvested and preserved, it is associated with a seed lot. Typically a seed lot is defined by when, where, and how it was harvested.

For early-generation materials, we would expect that each germplasm would only be associated with one seed lot. But, when materials are considered to be fixed or static, each new seed increase or regeneration will produce a new seed lot, but it will not produce new germplasm.

For example:

Crop

Germplasm

Seed Lots

Crop

Germplasm

Seed Lots

Maize

(CIMMYT standards)

CML444

  • TL14A-20NDTMAS-41

  • HY12R-ED71-3

  • KB18-A4-12

  • HY11R-N472-96

Wheat

(CIMMYT standards)

CMSS99Y03453M-040M-040Y-040M-040SY-040M-12Y-010M-0ZTB-0SY-0Y

  • Y18-19\TP2BULK\21

  • BV2019\TP3Bulk\7520

Rice

(IRRI standards)

 IR15A4027

  •  300255957

 

Package

Packages represent physical entities of seeds. Each harvested seed lot could be stored in one or more packages.

Packages are used as seed sources of entries in experiments or shipments.

Seed quantities are associated with packages and packages can be assigned to specific inventory storage facilities.

 

General relationships:

 

Example of early generation / segregating materials:

 

Example of fixed materials: