Discussion
Which of the following genotypes are most suitable as parents for hybrid variety development ?
Answer: D
The best parents for hybrid varieties are Inbred lines.
Hybrid varieties, as in maize, are the F1 of a cross between two inbred lines. Repeated selfing makes each line homozygous and uniform, so their F1 is uniform too, and lines with good combining ability are chosen to give the greatest heterosis. The same cross can be repeated each season to produce seed.
Isogenic and near-isogenic lines differ from each other at only one or a few genes, so crossing them gives almost no heterosis. Pure lines of self-pollinated crops are generally released as varieties in their own right rather than used as hybrid parents.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development