| 生物群体中氨基酸生物配比的遗传分化及测度 |
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| 引用本文： | 陈宏权,蒋模有.生物群体中氨基酸生物配比的遗传分化及测度[J].安徽农业大学学报,1996,23(2):206-212. |
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| 作者姓名： | 陈宏权 蒋模有 |
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| 作者单位： | 安徽农业大学动物科学系 |
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| 摘 要： | 氨基酸生物配比是构成蛋白质２０种氨基酸的应用频率，利用氨基酸生物配比可获得群体平均密码子差数的估计值，以分析群体的分化进程。两个群体分化的遗传距离Ｄ其中Ｃｉ＝两群体第ｉ种氨基酸应用频率之差；两群体的分化时间—Ｄ），其中ａ＝每位置上氨基酸每年的替换概率。通过对２７个物种（４００个样本）氨基酸生物配比的分化距离进行了测定，结果显示出不同组织器官的分化是不同步的。水稻和小麦种子的遗传距离为０．０１０７，而其茎叶的遗传距离只有０．００１２，相对分化时间种于是茎叶的０．７９倍；猪的血液和毛发的分化时间是其肌肉和血液分化时间的３．５倍。功能性组织器官趋向于更早分化。
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| 关 键 词： | 氨基酸 遗传距离 群体遗传学 |
Measures of Population Differentiation of Biological Formula of Amino Acid in Living Body |
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| Chen Hongquan,Jiang Moyon,Bi Shoudong,Tan Huarong.Measures of Population Differentiation of Biological Formula of Amino Acid in Living Body[J].Journal of Anhui Agricultural University,1996,23(2):206-212. |
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| Authors: | Chen Hongquan Jiang Moyon Bi Shoudong Tan Huarong |
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| Abstract: | As the frequency of amino acid usage in protein,the biological formula ofamino acid(BFAA)was used to estimate mean codon differences between populations in theanalysis of the evolutionary processes of populations. The estimating mOdels of genetic dis-tance(D)and differentiation time(t)bewteen populations on the basis of BFAA were es-tablished as(Ci=the difference of the frequencies of ith amino acid usage be-tween the populations)and as t= Ln(1 D)/(2a)(a=the rate of evolutionary aminoacid sugbstitution per year),respectively.The evolutionary process of different tissues dif-fered,with D=0.0107 between the seeds of rice and wheat,but with D=0.0012 betweenthe stew.The relative diHerentiation time between the seeds of rice and wheat was 8.79times that between the btew;the differentiation time between blood and hair in pig was 3.5times that between blood and muscle. |
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| Keywords: | Amino acid Genetic distance Evolution Phylogenetic tree of evolutionPopulation genetics |
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