Quality Rice Seed

Quality Rice Seed

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Planning and management of seed production btn_backbtn_forward
lesson_03 Producing breeder seed
To be able to produce breeder seed.
  1. Concept of breeder seed.
  2. Certification, bagging, and tagging of breeder seed.
  3. Production techniques of breeder seed


Concept of breeder seed

  • The breeder seed provides the source of the first and the subsequent increase of foundation seeds.
  • This seed is produced by or under the direct control of the sponsoring plant breeder.


Production techniques of breeder seed

The production and processing of breeder seeds are the same as described in Modules 2 and 3 of this course, with the exception of following points:

  • Clean, healthy, and treated seeds are sown in seed beds. Separate beds are used for different varieties marked by purple variety in between.
  • Seedbed layout must always be recorded in the field notebook.
  • In the main field, layout plan should be done with spacing: 15 x 20 or 20 x 20 cm2 (row x plant), depending on the season and variety. For example, 25 x 15 cm2 and 20 x 20 cm2 (row x plant) in rainfed and irrigated ecosystems, respectively.
  • Keep one row gap after every 6 rows to ease intercultural operation and rouging.
  • Keep 3-meter isolation distance from variety to variety. Time isolation of 3 weeks may also be followed.
  • fertilizer management is prescribed according to local need and soil test-based. Leaf color chart can also be used for N fertilizer application. In general, nitrogenous fertilizer should be reduced to one quarter than the recommended dose for grain production.
  • Efficient rouging should be done under the direct supervision of a professional rice breeder.
  • Always keep the main field clean for breeder seed production.
  • Contact the Seed Certification Agency (SCA) in advance for the certification of breeder seed.
  • Allow SCA officers' visit (at least 3 times) with their norms.
  • The crop should be harvested at 80% maturity with the consent of SCA officers.
  • Gently thresh to avoid any seed damage.
  • Clean well and sun-dry for 5-6 days (or use mechanical dryer at 40°C) to reduce moisture content to 12%.
  • Pack clean seeds using sack and store sack inside a dehumidified cold room, if possible, or use polycoated bag to store inside well-ventilated store room where ambient temperature should be around 30°C.


Certification, bagging, and tagging of breeder seed

Breeder seed must be certified by the Seed Certification Agency (SCA) (see lesson 6).

Bagging: Breeder seeds should be weighed  and bagged for sale or distribution depending on the demand of the clients. There must be a logo on the bag mentioning the seed-producing institution and the name of the variety.
For example: Genetic Resources and Seed Division, BRRI Logo.

Tagging/labeling: A tag showing the seed certification standard of a particular country should be tied/sewed to the bag. One tag is issued for every bag of seeds. Click here to see sample of tags.

Click here to see sample of certificate issued by a Seed Certification Agency.

Next lesson Producing foundation seed from the breeder seed. btn_backbtn_forward
Last Updated on Wednesday, 03 October 2012 11:01  

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