2
Given below are two statements
Statement (I) : The single cross hybrids have highest yield potential
Statement (II) : The single cross hybrid seed is harvested from detasseled line in commercial seed production plot
In light of the above statements, choose the most appropriate answer from the options given below.
EXPLANATION
Breeding Methods in Cross-Pollinated Crops
- Statement (I) is True: Single cross hybrids ($A imes B$) combine two completely inbred, homozygous lines, maximizing specific combining ability (SCA) and total genetic homogeneity; hence, they achieve the highest theoretical yield potential and absolute uniformity among all hybrid types.
- Statement (II) is True: Double cross hybrids ($(A imes B) imes (C imes D)$) contain broader genetic heterogeneity across individuals, conferring superior developmental homeostasis, wider climatic and edaphic adaptability, and greater buffering capacity against biotic and abiotic stresses compared to uniform single crosses.
- Conclusion: Both Statement (I) and Statement (II) are true (Option 1).
Correct option: (1) Both Statement (I) and Statement (I) are correct
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