Following are the activities in the development and release of a crop variety. Arrange the activities in chronological order i.e. from start to the last.
• [(A).] Evaluation of the collected genotypes and selection of parental genotypes.
• [(B).] Collection of diverse genotypes of the target crop.
• [(C).] Pair-wise cross-hybridization of the parental genotypes followed by evaluation and selection of the superior recombinants.
• [(D).] Testing, release, and commercializing the new variety.
Choose the correct answer from the options given below:
Following are the activities in the development and release of a crop variety. Arrange the activities in chronological order i.e. from start to the last.
• [(A).] Evaluation of the collected genotypes and selection of parental genotypes.
• [(B).] Collection of diverse genotypes of the target crop.
• [(C).] Pair-wise cross-hybridization of the parental genotypes followed by evaluation and selection of the superior recombinants.
• [(D).] Testing, release, and commercializing the new variety.
Choose the correct answer from the options given below:
Show Hint
\[ \text{Collection (B)} \rightarrow \text{Evaluation/Selection (A)} \rightarrow \text{Hybridization (C)} \rightarrow \text{Testing/Release (D)} \]
- (B), (C), (A), (D)
- (B), (A), (C), (D)
- (A), (B), (C), (D)
- (C), (A), (B), (D)
The Correct Option is B
Solution and Explanation
Plant breeding is a systematic, multi-step process.
Developing and releasing a new crop variety requires a logical sequence of germplasm collection, evaluation, hybridization, selection, and multi-location testing.
Step 3: Detailed Explanation:
Let us organize the steps of crop variety development in chronological order:
1. Collection of diverse genotypes (B): The breeding process begins with gathering genetic diversity (germplasm) from different sources. This provides the raw material for selection and hybridization.
2. Evaluation and selection of parents (A): The collected genotypes are grown and evaluated under controlled conditions to identify individuals with desirable traits (such as high yield, disease resistance, or drought tolerance) to use as parents.
3. Cross-hybridization and selection of recombinants (C): Selected parents are crossed to combine their desirable genes.
The offspring are grown over several generations, and superior recombinants are selected.
4. Testing, release, and commercialization (D): The chosen recombinants undergo multi-location testing to compare their performance against existing standard varieties (checks).
The best line is then officially released and commercialized for cultivation.
Therefore, the correct chronological sequence is: (B) \(\rightarrow\) (A) \(\rightarrow\) (C) \(\rightarrow\) (D).
Step 4: Final Answer:
The correct chronological sequence is Option (B).
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