Oka (1975) proposed that the ideal population size for preserving and propagating a self-pollinated crop variety should be________________?
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Answer: C. 300 plants
Explanation
Oka proposed that preserving an ideal population size of around 300 plants is effective for maintaining self-pollinated crop varieties. This specific number balances genetic conservation needs with practical operational constraints in plant breeding stations. Maintaining this size prevents the loss of valuable minor alleles. Self-pollinating crops generally maintain high levels of homozygosity, requiring careful sampling strategies during preservation. Population size theory in genetics dictates that adequate numbers prevent inbreeding depression and genetic drift. Plant breeders rely on such guidelines to maintain pure lines.
Seed banks and agricultural research institutes apply population size thresholds during regeneration cycles. Preserving genetic integrity ensures that crop varieties retain their distinct agronomic performance traits over decades. Proper management protects agricultural biodiversity for future generations. Lower counts like 100 or 200 plants increase the risk of genetic drift and loss of diversity. Higher counts like 400 plants can exceed necessary operational resources without providing proportional genetic benefits. Hence, 300 plants is the recommended ideal size.
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- Agriculture
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