ライトの移転バランス理論:実験的研究

M J Wade¹, C J Goodnight

¹Department of Ecology and Evolution, University of Chicago, IL 60637.

Science (New York, N.Y.)

|August 30, 1991

まとめ

この研究は,粉虫を用いた進化のライトの移転バランス理論を実験的に確認している. 重要な要素であるインターデミック・セレクションは,人口の適性を著しく高め,適応的進化をサポートしています.

科学分野:

進化生物学の進化生物学について
人口遺伝学人口遺伝学

背景:

ライトの移転バランス理論は,適応的進化の基石である.
直接的な経験的証拠と,インターデミック・セレクションの有効性は依然として論争の的だ.

研究の目的:

ライトの移転バランス理論の実験的確認を提供するために.
適応的進化におけるインターデミック・セレクションの役割と効果を調査する.

主な方法:

トリボリウム・カスタネウム (Tribolium castaneum) の実験室の集団に,インターデミック選択を課した.
高いフィットネスから低いフィットネスへの個人の分散差.
ランダムな移住で集団を制御するための実験配列を比較した.

主要な成果:

実験用配列における平均人口の健康状態の有意な増加.
2世代毎のインターデミック選択で観察された最適な反応.
遺伝子の相互作用が,観察されたフィットネス増加に関与していることが示唆されています.

結論:

移転バランス理論のインターデミック・フェーズは,平均的なフィットネスを高めることができます.
実験的証拠は,インターデミック・セレクションの適応の可能性を裏付けている.
この過程の基礎となる遺伝子相互作用に関するさらなる研究が必要である.

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