1
In embryo abortion between to. days after pollination is the main barrier in the distant hybridization
EXPLANATION
Distant Hybridization, Endosperm Balance Numb
- Post-Zygotic Barriers and Embryo Abortion Timing:
- In wide interspecific crosses (e.g., Solanum, Phaseolus, and Cucurbita distant hybridizations), endosperm degeneration and subsequent hybrid embryo abortion predominantly occur between 6 to 25 days after pollination.
- To overcome this hybridization barrier, immature hybrid embryos must be excised and rescued in vitro on nutrient culture medium within this critical 6–25 day window.
- Correct Option: Option 1 (6 to 25 days).
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