翻訳と辞書 Words near each other ・ Malebolgia ・ Malebranche ・ Malebranche (Divine Comedy) ・ Malec ・ Malec, Lesser Poland Voivodeship ・ Malec, Podlaskie Voivodeship ・ Malechowo ・ Malechowo, Kołobrzeg County ・ Malechowo, Szczecinek County ・ Malechowo, Sławno County ・ Malechy ・ Malechówko ・ Malecite-Passamaquoddy language ・ Malecon ・ Malecon Center ・ Malecot's method of coancestry ・ Maleczewo ・ Malecón 2000 ・ Malecón, Havana ・ Malecón, Puerto Vallarta ・ Maledetta Primavera ・ Maledetti (Maudits) ・ Maledetto il giorno che t'ho incontrato ・ Maledi ・ Maledicta ・ Malediction ・ Malediction (EP) ・ Malediction and Prayer ・ Maledictology ・ Maledictosuchus Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Malecot's method of coancestry ： ウィキペディア英語版 Malecot's method of coancestry Malecot's coancestry coefficient, $f$, refers to an indirect measure of genetic similarity of two individuals which was initially devised by the French mathematician Gustave Malécot. $f$ is defined as the probability that any two alleles, sampled at random (one from each individual), are identical copies of an ancestral allele. In species with well-known lineages (such as domesticated crops), $f$ can be calculated by examining detailed pedigree records. Modernly, $f$ can be estimated using genetic marker data. == Evolution of inbreeding coefficient in finite size populations == In a finite size population, after some generations, all individuals will have a common ancestor : $f\; \backslash rightarrow\; 1$. Consider a non-sexual population of fixed size $N$, and call $f\_i$ the inbreeding coefficient of generation $i$. Here, $f$ means the probability that two individuals picked at random will have a common ancestor. At each generation, each individual produces a large number $k\; \backslash gg\; 1$ of descendants, from the pool of which $N$ individual will be chosen at random to form the new generation. At generation $n$, the probability that two individuals have a common ancestor is "they have a common parent" OR "they descend from two distinct individuals which have a common ancestor" : :$f\_n\; =\; \backslash frac\; +\; \backslash fracf\_$ :$\backslash approx\; \backslash frac+\; (1-\backslash frac)f\_.$ This is a recurrence relation easily solved. Considering the worst case where at generation zero, no two individuals have a common ancestor, :$f\_0=0$, we get :$f\_n\; =\; 1\; -\; (1-\; \backslash frac)^n.$ The scale of the fixation time (average number of generation it takes to homogenize the population) is therefore :$\backslash bar=\; -1/\backslash log(1-1/N)\; \backslash approx\; N.$ This computation trivially extends to the inbreeding coefficients of alleles in a sexual population by changing $N$ to $2N$ (the number of gametes). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Malecot's method of coancestry」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.