Quality Rice Seed

Quality Rice Seed

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Production of Rice Seed in Irrigated Environments btn_backbtn_forward
Isolation for rice seed production
Be able to understand the need for maintaining the appropriate isolation distance between seed production plots.


Although rice crop is a self-pollinated crop, cross pollination of up to 5% can occur due to:
  • Wind pollination: Rice pollen is light when dry and wind can carry seed some distance.
  • Insect pollination: Since there are many insects in rice fields, there is a chance of insect pollinating to seeds.
  • Birds, snails, water, and others can also cause cross-pollination.
isolation Isolation is the separation of a seed crop from all possible sources of contamination during the growing period and is one of the main ways of maintaining varietal purity.

Isolation is primarily achieved through maintaining a safe distance between different crops.

The "isolation distance" between a seed crop of a particular variety and a crop of a different variety is a space separating the crops large enough to prevent cross pollination.

Research has shown that a 3 meters isolation distance from other varieties is needed for rice seed production. That is, the use of a 3 meters buffer zone surrounding a crop will prevent cross-pollination.

  • A safe minimum isolation distance from neighboring crops of different varieties is 3 meters.
  • The larger the seed plot, the less the danger of out-crossing

The isolation distance is compulsory for seed producers if they wish their multiplied seeds certified by the appropriate authority.

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Last Updated on Friday, 28 September 2012 09:46  

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