Seed Generation Multiplication & Breeder to Certified Seed
Multiplies breeder
Enter breeder seed, the multiplication ratio and number of generations to get the final certified seedquantity, the fold increase, and the seed built up at each stage.
Multiply your seed
Next: plan field area for each stage — your 6,400,000 kg of certified seed can sow a large commercial area; ensure isolation, roguing and certification at every generation.
Real multiplication ratios depend on crop, seed rate and yield; self-pollinated cereals differ greatly from small-seeded vegetables. Generation limits are set by seed-certification rules.
Seed multiplication — key facts
- Final seed
- breeder × ratio^generations
- Fold increase
- final ÷ breeder seed
- Seed chain
- breeder → foundation → certified
- Cereal ratio
- ≈ 30–80× per generation
- Typical generations
- 2–3 to certified
- Each stage
- inspected for purity
- Compounds
- increase multiplies each year
- Privacy
- Runs in your browser; nothing uploaded
From a breeder's handful to a market's worth of seed
A new variety is born as a tiny lot of breeder seed — far too little to plant a commercial area. To reach the certified seed farmers buy, that lot is built up in stages: breeder seed sown to make foundation seed, foundation seed sown to make certified seed. Each generation multiplies the quantity by the seed-multiplication ratio, and because it compounds, a small start becomes a very large finish.
This tool runs that chain for you: the final certified seed quantity, the fold increase, the generations and the breeder seed behind it, so you can size a multiplication programme to hit a market target. Set the ratio to your crop and the generations to your scheme, then pair it with the Hybrid Seed Row Ratio, Seed Rate and Seed Production Premium tools.
Size the programme
Know the certified seed each chain yields.
See it compound
Watch the fold increase build each year.
Plan the generations
Reach your target in the fewest stages.
Hit market volume
Work back from the seed your buyers need.
Frequently Asked Questions
What is seed multiplication?+
Seed multiplication is the planned build-up of seed over successive generations so that a small, pure starting lot becomes a large commercial quantity. Each generation is sown, grown and harvested to produce far more seed than was planted — the seed chain that turns a breeder's handful into the certified seed farmers buy.
What are breeder, foundation and certified seed?+
These are the classes of the seed chain. Breeder seed is the purest stock produced under the breeder's control. Sowing it gives foundation seed, the first multiplication. Sowing foundation seed gives certified seed, the class sold to growers for crop production. Each step multiplies the quantity while controlling purity and quality.
How is the final seed quantity calculated?+
Each generation multiplies the seed by the seed-multiplication ratio (how many kilos of seed one kilo sown returns). Over several generations the increase compounds: final seed = breeder seed × ratio^generations. So 10 kg of breeder seed at a 40× ratio over two generations becomes 10 × 40 × 40 = 16,000 kg of certified seed.
What is the seed multiplication ratio?+
The multiplication ratio is the factor by which a seed lot increases in one generation — output seed divided by seed sown. It depends on the crop's seed rate and yield: cereals might be 30–80×, while pulses and large-seeded crops are lower. A higher ratio reaches commercial volumes in fewer generations.
Why build seed up over generations instead of one big crop?+
Breeder seed exists only in tiny amounts, so you cannot plant a commercial area straight away. Multiplying in stages — breeder → foundation → certified — lets a small pure lot grow into thousands of kilos while each step is inspected and certified for genetic purity, germination and health, protecting the variety's quality.
What is the fold increase?+
The fold increase is how many times bigger the final lot is than the breeder seed you started with — final seed ÷ breeder seed, which equals the ratio raised to the number of generations. It captures the whole chain in one number: a 40× ratio over three generations is a 64,000-fold increase.
How many generations should I plan?+
Enough to reach the certified-seed quantity your market needs, no more. Each extra generation adds compounding volume but also another year and a chance for purity to drift, so most schemes use two to three multiplications from breeder to certified. Choose the generations and ratio that just clear your target quantity.
Does the same maths work for any crop?+
Yes — the compounding logic (ratio^generations) applies to any seed-propagated crop; you just set the multiplication ratio to match the crop's seed rate and yield, and the number of generations to match its seed-chain scheme. Self-pollinated cereals, pulses and oilseeds all fit this model.
Are the figures exact?+
They're solid planning figures. Real multiplication varies with yield, rogueing losses, rejection at inspection and storage, so use a realistic ratio from your own results and keep a margin. Treat the output as the seed you can expect to build up, then refine the ratio as your production data comes in.