Question:
Steps for synthetic breeding are as given below:
A. Testing of specific combining ability effects
B. Growing inbred lines in isolation and allowing random mating
C. Development of inbred lines
D. Selection of about 5 inbred lines basis of higher sca effects
E. Testing performance of synthetics over varieties
Choose the correct answer from the options given below:
Steps for synthetic breeding are as given below:
A. Testing of specific combining ability effects
B. Growing inbred lines in isolation and allowing random mating
C. Development of inbred lines
D. Selection of about 5 inbred lines basis of higher sca effects
E. Testing performance of synthetics over varieties
Choose the correct answer from the options given below:
A. Testing of specific combining ability effects
B. Growing inbred lines in isolation and allowing random mating
C. Development of inbred lines
D. Selection of about 5 inbred lines basis of higher sca effects
E. Testing performance of synthetics over varieties
Choose the correct answer from the options given below:
Show Hint
Synthetic variety breeding sequence:
Inbred line development $\rightarrow$ Combining ability testing $\rightarrow$ Parental selection $\rightarrow$ Isolated random mating $\rightarrow$ Field performance evaluation.
Inbred line development $\rightarrow$ Combining ability testing $\rightarrow$ Parental selection $\rightarrow$ Isolated random mating $\rightarrow$ Field performance evaluation.
Updated On: Aug 7, 2026
- D, A, C, E, B
- A, C, B, D, E
- C, A, D, B, E
- A, B, C, D, E
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
A synthetic variety is developed by crossing a set of inbred lines or clones that have demonstrated good combining ability.
The development follows a structured sequence of breeding steps to maximize heterosis and ensure genetic stability.
Step 2: Detailed Explanation:
The standard procedure for breeding a synthetic variety involves the following steps:
1. C. Development of inbred lines: First, a diverse pool of inbred lines or clones is developed through self-pollination or selection.
2. A. Testing of combining ability effects: The developed inbred lines are crossed to test their general combining ability (GCA) and specific combining ability (SCA) to identify the best parents.
3. D. Selection of about 5 inbred lines based on higher combining ability effects: A select group of superior lines (typically 5 to 6) is chosen based on their high combining ability performance.
4. B. Growing selected lines in isolation and allowing random mating: The selected parent lines are planted in an isolated field and allowed to intercross randomly (open pollination) to produce the synthetic seed.
5. E. Testing performance of synthetics over standard varieties: The performance of the newly synthesized variety is evaluated in multi-location trials against existing commercial cultivars.
This sequence of steps corresponds to C $\rightarrow$ A $\rightarrow$ D $\rightarrow$ B $\rightarrow$ E.
Step 3: Final Answer:
The correct chronological sequence for synthetic breeding is C, A, D, B, E, which corresponds to Option (C).
A synthetic variety is developed by crossing a set of inbred lines or clones that have demonstrated good combining ability.
The development follows a structured sequence of breeding steps to maximize heterosis and ensure genetic stability.
Step 2: Detailed Explanation:
The standard procedure for breeding a synthetic variety involves the following steps:
1. C. Development of inbred lines: First, a diverse pool of inbred lines or clones is developed through self-pollination or selection.
2. A. Testing of combining ability effects: The developed inbred lines are crossed to test their general combining ability (GCA) and specific combining ability (SCA) to identify the best parents.
3. D. Selection of about 5 inbred lines based on higher combining ability effects: A select group of superior lines (typically 5 to 6) is chosen based on their high combining ability performance.
4. B. Growing selected lines in isolation and allowing random mating: The selected parent lines are planted in an isolated field and allowed to intercross randomly (open pollination) to produce the synthetic seed.
5. E. Testing performance of synthetics over standard varieties: The performance of the newly synthesized variety is evaluated in multi-location trials against existing commercial cultivars.
This sequence of steps corresponds to C $\rightarrow$ A $\rightarrow$ D $\rightarrow$ B $\rightarrow$ E.
Step 3: Final Answer:
The correct chronological sequence for synthetic breeding is C, A, D, B, E, which corresponds to Option (C).
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