Chronological steps in the development of genotype and release of a crop variety
A. Preliminary yield trial
B. Genotype development
C. Multilocation trial
D. Notification of variety
E. Identification of variety
Choose the correct answer from the options given below
A. Preliminary yield trial
B. Genotype development
C. Multilocation trial
D. Notification of variety
E. Identification of variety
Choose the correct answer from the options given below
Show Hint
Notification is always the absolute final step in the legal release process.
- B-C-A-E-D
- B-A-C-E-D
- B-A-C-D-E
- E-B-A-C-D
The Correct Option is B
Solution and Explanation
The question asks for the correct sequential order of activities involved in a systematic plant breeding program, starting from the creation of genetic variability to the official release of a commercial variety.
Step 2: Detailed Explanation:
The standard procedure for variety development involves several strictly defined stages:
• Genotype Development (B): This is the initial phase where genetic variability is created through hybridization, mutation, or selection from germplasm. Breeding populations are handled (e.g., Pedigree or Bulk method) to develop stable, homozygous lines.
• Preliminary Yield Trial (A): Once stable genotypes are developed, they are evaluated in small-scale trials at a single location (usually the breeding station).
The objective is to eliminate poor performers and select promising entries for wider testing.
• Multilocation Trial (C): Selected lines are then tested across various geographic locations and climatic zones to assess their stability and adaptability (G \( \times \) E interaction).
In India, this is usually done through the All India Coordinated Research Projects (AICRP).
• Identification of Variety (E): After successful performance in multilocation trials for 2-3 years, a promising line is proposed to a Variety Identification Committee (VIC).
If approved, it is "identified" for release in specific zones.
• Notification of Variety (D): Following identification, a formal proposal is sent to the Central Sub-Committee on Crop Standards, Notification, and Release of Varieties.
The "notification" in the official gazette is the final step that allows the variety to be produced and sold legally under the Seed Act.
Final Answer:
The chronological sequence is B \( \rightarrow \) A \( \rightarrow \) C \( \rightarrow \) E \( \rightarrow \) D.
This corresponds to option (B).
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