RADISH (Raphanus sativus L.)

FOUNDATION SINGLE CROSSES

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 the seeds of  foundation single crosses of radish.

   B.     The General Standards are amplified as follows to apply specifically to the foundation single crosses of 

radish;

    1. Eligibility requirements for certification

    (a) A foundation single cross to be eligible for certification must be produced  by seed to seed method as the inbred lines are

         by and large fixed for the desired attributes.

    (b) A foundation single cross to be eligible for certification must be produced from two approved inbred lines, the

 identity of which is assured and is approved by the Certification Agency.

    2. Classes and Sources of seed

    (a) A foundation single crosses shall consist of the first generation hybrid resulting from the controlled crossing of the two

approved self- imcompatible but cross-compatible inbred lines. The foundation single crosses may be of three types depending 

upon the procedure of seed producation;

        - seeds of only female parent are harvested and certified;

        - seeds of both parents are harvested separately and certified; 

           and

        - seeds of both the parents are harvested, mixed together and certified.

    (b) The foundation single cross shall be used for production of  hybrid seed.

II. Land requirements

    Land to be used for seed production of  foundation single crosses of radish shall be free from volunteer plants.

III. Field Inspection

    A minimum of three inspections shall be made as follows:

    1.  the first  inspection shall be made before flowering to check isolation, offtypes, outcrosses,

         planting ratio, and other relevant factors; 

    2. the second inspection shall be made during flowering to check isolation, offtypes and other relevant

        factors;

    3. the third inspection shall be made at maturity and prior to harvesting to check offtypes, seed borne 

        diseases and other relevant factors.

IV. Field Standards

A. General requirements

1. Isolation

    Seed fields of foundation single cross shall be isolated from the contaminants shown in column 1 of the Table 

below by the distances specified in column 2 of the said Table:

                       Contaminants                                                                                       Minimum distance 

                                                                                                                                                                                 (meters)

                              1                                                                                                           2

        Fields of other varieties including same single species including 

        commercial hybrid of the same variety                                                                      1600

        Fields of the same single cross / hybrid (code designation)

        not conforming to varietal purity requirements for certification              

        and rat-tail radish (Raphanus caudatus L.)                                                                 1600

B. Specific requirements    

        Factor                                                                                              Maximum permitted (%)

Offtypes in each parent at and after flowering                                                    0.010

*Plants affected by seed borne diseases at final inspection                                 0.10

*Seed borne diseases shall be:

    Black leg: Leptosphaeria maculans (Desm.)Ces. & de Not)

    Black rot:Xanthomonas camepstris  pv.campestris (Pamm.) Dawson

        Factor                                                                                                Standards

Pure seed (minimum)                                                                                     98.0%

Inter matter (maximum)                                                                                    2.0%

Other crop seeds (maximum)                                                                         None

Weed seeds (maximum)                                                                                None

Germination (minimum)                                                                                   70%

Moisture (maximum)                                                                                       6.0%

For vapour-proof containers (maximum)                                                         5.0%