Question

Germination (%) of the seeds is an important parameter of seed quality. The minimum standard for seed germination in cauliflower hybrid is-

• A. 60%
• B. 65%
• C. 70%
• D. 75%

Hint:

The minimum seed germination standards for several major vegetable crops are:
Cauliflower/Cabbage = \( 65\% \).
Tomato/Onion = \( 70\% \).
Okra/Cucumber = \( 65\% \).
Knowing these limits is highly beneficial for seed technology exams.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Under the seed certification standards (such as the Indian Minimum Seed Certification Standards, IMSCS), every certified crop seed lot must meet minimum laboratory germination percentages to be approved for sale.
These standards ensure that the seeds purchased by farmers have high viability and can establish a uniform crop stand in the field.

Step 2: Detailed Explanation:
Different vegetable crops have different physiological limits and minimum germination standards established by certification authorities:
1. Cole Crops Germination Standards: For cole crops belonging to the Brassicaceae family, such as cabbage, cauliflower, and knol-kohl, specific limits are defined.
2. Cauliflower Standards: According to the official minimum seed certification standards, the minimum germination limit for both open-pollinated (OP) and hybrid seeds of cauliflower (Brassica oleracea var. botrytis) is set at \( 65\% \).
If a seed lot exhibits a laboratory germination percentage below \( 65\% \), it fails to meet the certification requirements and cannot be sold as certified seed.
3. Comparison with other crops:
- Maize and wheat have higher minimum germination standards (typically \( 85\% \)).
- Soybeans and some pulses have a standard of \( 70\% \).
- Some cucurbits and solanaceous crops have standards around \( 60\% \text{ to } 70\% \).
Therefore, the legal minimum standard for cauliflower hybrid seed germination is \( 65\% \).

Step 3: Final Answer:
The minimum standard for seed germination in cauliflower hybrids is 65%, corresponding to option (B).