| 基于适合度的自交群体基因型熵逐代演变规律 |
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| 引用本文： | 李大林.基于适合度的自交群体基因型熵逐代演变规律[J].农业科学与技术,2009,10(5):15-17. |
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| 作者姓名： | 李大林 |
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| 作者单位： | 柳州职业技术学院基础部,广西柳州545006 |
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| 摘 要： | 研究一对杂合基因3种基因型不同适合度的自交群体，用差分方程组反映基因型比例的逐代变化规律。结果表明，通过熵观察到母代全为杂合子群体的基因型比例趋向平衡大约需要15代；Rr的适合度与RR、rr相比都大于或等于2倍，这正是Rr在群体中得以长期保留的条件。同时，该研究模型表明，自然界绝对自交是不存在的。偶然的异交不是可有可无，而是关系重大。如果没有偶然的异交，群体中不但不会存在杂合子，甚至不会出现等位基因，每个基因座只能有一个基因。
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| 关 键 词： | 自交群体 适合度 基因型 熵 |
Evolution Law by Generations of Genotype Entropy of the Inbred Population Based on Fitness |
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| LI Da-lin.Evolution Law by Generations of Genotype Entropy of the Inbred Population Based on Fitness[J].Agricultural Science ＆ Technology,2009,10(5):15-17. |
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| Authors: | LI Da-lin |
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| Institution: | LI Da-lin( Dept. of Basic Courses, Liuzhou Vocational Institute of Technology, Liuzhou 545006) |
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| Abstract: | The study researched the inbred population which three genotypes of each pair heterozygous gene with different fitness. Change law by generations of genotype ratio was reflected by difference equations. The result showed that the genotype ratio that parents were all heterozygous population tended to balance, about needing 15 generations. The fitness of Rr was over or equal to two times of RR＇s or rr, which was the condition of Rr could be reserved for a long time. |
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| Keywords: | Inbred population Fitness Genotype Equilibrium Entropy |
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