Question

Different classes of seeds have various levels of genetic purity (%) standards. Arrange the following classes of seeds in ascending order of their genetic purity. 
• [(A).] TL Seeds 
• [(B).] Breeders seeds 
• [(C).] Foundation seeds 
• [(D).] Certified seeds 
Choose the correct answer from the options given below: 
 

• A. (A), (C), (D), (B)
• B. (C), (A), (B), (D)
• C. (A), (D), (C), (B)
• D. (A), (B), (D), (C)

Hint:

To remember the sequence of seed classes from breeder to farmer, memorize the tag colors:
- Breeder Seed: Golden Yellow Tag (\(100%\) purity).
- Foundation Seed: White Tag.
- Certified Seed: Azure Blue Tag (purity for farmers).
- TL Seed: Opal Green Tag (self-certified by producer).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The seed multiplication chain is organized into several classes to maintain genetic purity and quality as seed is scaled up for distribution to farmers.

Step 3: Detailed Explanation:
Let us review the genetic purity standards for each of the given seed classes:
- Truthfully Labelled (TL) Seeds (A): These seeds are produced by private companies or government agencies.
Their genetic purity and quality standards are guaranteed by the producer rather than through official certification.
As a result, they generally have more variable and lower genetic purity standards than officially certified seed classes.
- Certified seeds (D): This is the final class of seed in the multiplication chain, produced from foundation seeds.
It is distributed to commercial farmers and must meet strict genetic purity standards (typically \(99.0%\) to \(99.5%\)).
- Foundation seeds (C): This class is produced from breeder seeds and has higher genetic purity standards (typically \(99.5%\) to \(99.9%\)).
- Breeder seeds (B): This class is produced directly by the originating plant breeder. It possesses the highest genetic purity standard, which is always \(100%\).
Arranging these classes in ascending order of genetic purity (from lowest to highest):
\[ \text{TL Seeds (A)} \rightarrow \text{Certified seeds (D)} \rightarrow \text{Foundation seeds (C)} \rightarrow \text{Breeder seeds (B)} \] This corresponds to the sequence (A) \(\rightarrow\) (D) \(\rightarrow\) (C) \(\rightarrow\) (B).

Step 4: Final Answer:
The correct ascending order is Option (C).