PADDY (Oryza sativa L.) HYBRIDS

I. Application and Amplification of General Seed Certification Standards

A. The General Seed Certification Standards are basic and together with the following specific standards constitute the standards for certification of hybrid paddy seed.

B. The General standards are amplified as follows to apply specifically to the hybrids of paddy.

1. Eligibility requirements for certification

a. An inbred line to be eligible for certification shall be from a source such that its identity may be assured and approved by the Certification Agency.

b. Hybrid seed to be eligible for certification shall be the progeny of two approved inbred lines, one of which shall be male sterile.

2. Classes and sources of seed

a. An inbred line shall be relatively true breeding strain resulting from self pollination with selection.

b. Foundation class seed shall consist of an approved male sterile line to be used as a female parent and approved inbred line to be used as a male parent for the purpose of producing hybrid seed.

c. A male sterile line shall be a strain (A) carrying cytoplasmic genetic male sterility, which sheds no viable pollen and is maintained by the normal sister strain (B) which is used as pollinator.

d. The certified seed class shall be the hybrid seed to be planted for any use except seed production.

II. Land requirements

Land to be used for seed production of hybrid barley shall be free of volunteer plants.

III. Field Inspection

A minimum of four inspections shall be made as follows:

1. The first inspection shall be made before flowering in order to determine isolation, presence of volunteer plants, out crosses, planting ratio, errors in planting and other relevant factors.

2. The second and third inspections shall be made during flowering to cheek isolation, offtypes, pollen shedders in female parent and other relevant factors.

3.The fourth inspection shall be made at maturity and prior to harvesting to verify true nature of the plant and other relevant factors.

IV. Field Standards

A. General requirements

1. Isolation

a. Hybrid paddy seed fields shall be isolated from the contaminants shown in the column 1 of the Table below by the distances specified in columns 2 and 3 of the said Table:

        Contaminants                                                                                   Minimum distance (meters)

                                                                                                                Foundation        Certified

            1                                                                                                         2                     3

Fields of other varieties including commercial hybrid of the 

same variety                                                                                                    200                100

Fields of the same hybrid (Code designation) not conforming to the

varietal purity requirements for certification                                                       200                100

B. Specific requirements

        Factor                                                                                              Maximum permitted (%)*

                                                                                                                Foundation            Certified

      Offtypes in seed parent                                                                         0.050                    0.20

      Offtypes in pollinator                                                                            0.050                    0.20

      Pollen shedding earheads in seed parent                                                0.050                    0.10

  **Objectionable weed plants                                                                    0.010                    0.020

* Standards shall be met at  any inspection conducted at and after flowering.

** Objectionable weed shall be:

wild rice (Oryza sativa L.var.fatua Prain)(Syn.O.sativa L.f.spontanea Rosch.)

V. Seed standards

        Factor                                                                                              Standards for each class

                                                                                                                Foundation            Certified

Pure seed (minimum)                                                                               98.0%                    98.0%

Inert matter (maximum)                                                                                2.0                        2.0

Husklessseed (maximum)                                                                           2.0%                    2.0%

Other crop seeds (maximum)                                                                   10/kg                      20/kg

Other distinguishable varieties (maximum)                                                 10/kg                      20/kg

Total Weed seeds (maximum)                                                                  10/kg                      20/kg

Objectionable seed weeds (maximum)                                                        2/kg                        5/kg

Seeds infected by paddy bunt                        

Padwick & Azmatulla  Khan) (maximum)                                                    0.10%                    0.50%

                                                                                                            (By number)           (By number)

Germination (minimum)                                                                               80%                        80%

Moisture (maximum)                                                                                  13.0%                     13.0%

For vapour-proof containers (maximum)                                                    8.0%                        8.0%

* Objectionable weed is the same as given at IV B above.