…If selection does not cause a sudden change in genetic composition, we can expect improvements in each generation, but in reality, good genes are fixed, genetic variance decreases, and heritability also decreases, reaching a plateau if selection is continued for a long time. Taking advantage of the approximately linear relationship between genetic gain and the number of selection generations, the heritability estimated from the formula ⊿ G = ih 2 is called the realized heritability. [Onishi Omi] … *Some of the terminology explanations that refer to "realized heritability" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…選抜により遺伝的組成が急激に変わらないならば,毎代それだけの改良が期待できるが,実際には良い遺伝子が固定し,遺伝的な分散が減少する結果遺伝率も低下し,選抜を長く続けると頭打ちになる。遺伝的獲得量と選抜世代数が近似的に直線関係になることを利用して,⊿G=ih2の式から推定した遺伝率を,実現された遺伝率realized heritabilityという。【大西 近江】。… ※「realized heritability」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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