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

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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.

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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.

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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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