Multilingual Demographic Dictionary, second unified edition, English volume

Mean selective values (MEAN selective values)

Translation
Section	English 914	Arabic 914	Czech 914	German 914	Spanish 914	French 914	Italian 914	Japanese 914	Portuguese 914	Russian 914	Chinese 914
914-1	selection	اصطفاء	selekce	Selektion —natürliche Auslese	selección	sélection	selezione	淘汰	seleção	Отбор —Селекция	选择
914-2	selective value —fitness value	قيمة الاصطفائية	selektivní hodnota —adaptivní hodnota	Selektionswert	valor selectivo	valeur sélective	valore selettivo	淘汰値（選択価） —適応値	valor seletivo —valor de aptidão	Селективная способность —Способность селективная	选择值 —适应值
914-3	mean selective values —fitness	قيمة الاصطفائية المتوسطة	střední selektivní hodnota —střední adaptivní hodnota	durchschnittlicher Selektionswert	valor selectivo promedio	valeur sélective moyenne	valore selettivo medio	平均淘汰値 —適応度	valor seletivo médio —aptidão	Средняя селективная способность —Способность селективная средняя	平均选择值 —平均适应性
914-4	genetic load	عبء وراثي	genetická zátěž	genetische Belastung	carga genética	fardeau génétique	fardello genetico	遺伝的加重	carga genética	Генетическая нагрузка	遗传负荷
914-5	genetic drift	حيد وراثي	genetický posun	Gendrift	deriva genética	dérive génétique	deriva genetica	遺伝的浮動	flutuação genética	Мутация нейтральная	遗传漂移
914-6	gene structure	بنية وراثية	genová struktura	Genstruktur	estructura genética	structure génique	struttura genetica	遺伝子構造	estrutura genética	Генная структура	基因结构
914-7	genotypic structure	بنية نمط وراثي	genotypová struktura	genotypische Struktur	estructura genotipica	structure génotypique	struttura genotipica	遺伝子型構造	estrutura genética	Генотипная структура	基因型结构

The probability that an individual of reproductive age will have a given number of offspring who also attain reproductive age may depend on his genotype (912-1). This differential reproduction is called selection ¹. The selective value ² or fitness value ² of a genotype is the relative number of children of individuals with the genotype who survive to reproductive age. The mean selective value ³ or fitness ³ of a population is equal to the average of the selective values for the genotypes of its members. The genetic load ⁴ of the population is the relative decline in the mean value of fitness resulting from the presence of different genotypes with varying fitness values. Random fluctuation of the frequency with which a specific gene is found in different generations of a population is called the genetic drift ⁵. The gene structure ⁶ of a population refers to the distribution of the frequencies of different alleles (911-5) on a given locus (911-4) within the members of the population. The genotypic structure ⁷ of a population refers to the distribution of different genotypes on the same locus. More...