…In this sense, the “undetermined” germinal region that will form a certain organ if development proceeds normally is called a presumptive primordium, and the word “presumptive” is added to the name of the organ to be formed, such as the presumptive eye primordium. In normal development, the arrangement of each presumptive primordium should be constant, so this is shown by a map called a fate-map, which has been created for various vertebrates. The mechanism that determines the formation of presumptive primordium has long been studied as an important issue in developmental biology. … *Some of the terminology that mentions "fate-map" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このような意味で,発生が正常に進行すればある特定の器官を形成する〈未決定〉な胚域を予定原基と呼び,たとえば予定眼原基というように,形成されるべき器官名に〈予定presumptive〉という言葉を付加する。正常発生の場合には,各予定原基の配置は一定しているはずなので,それを示すものを原基分布図fate‐mapといい,さまざまな脊椎動物についてそれが作られている。 予定原基を原基へと決定づけるしくみは,発生学上の重要課題として久しく研究されてきた。… ※「fate-map」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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