不同公母比例下威宁牛原位保种群体遗传漂变的计算机模拟
Computer Simulation of Genetic Drift in the in-situ Conservation Population of Weining Cattle under Different Male-female Ratios
鲁立刚 1鲁绍雄2
作者信息
- 1. 毕节市畜牧兽医科学研究所,贵州 毕节,551700
- 2. 云南农业大学动物科学技术学院,云南 昆明,650201
- 折叠
摘要
通过计算机模拟方法研究威宁牛原位保种群在假定实行随机留种、随机交配、世代不重叠、群体间个体无迁移、整个保种过程中基因不发生突变的情况下50 个世代中不同公母比例对群体内等位基因频率和基因型频率的影响.结果表明:公母比例越大(1∶99、1∶49),由于世代间随机遗传漂变而导致的等位基因A1 的频率达到极大值(A1=1.0000)被固定的世代就越早出现、基因型A1 A1、A1 A2、A2 A2 的频率达到极值(1 或 0)的世代数也越早,保种效果较差;公母比例越小(1∶4、1∶9、1∶19),等位基因A1 被固定、3 种基因型频率达到极值(1 或0)的风险就越低,保种效果也越好.
Abstract
Computer simulation was used to investigate the effects on allele frequency and genotype frequency in the in-situ conservation population of Weining cattle with different male-female ratios among 50 generations,assuming that there was no gene mutation and individual immigration between populations throughout the conserva-tion process.Random selection and mating,and non-overlapping were implemented in all generations.The re-sults showed that the larger the ratio of male to female(1∶99,1∶49),the earlier the fixed generation appeared due to random genetic drift between generations,and the earlier the frequency of allele A1 reached to its maximum(A1=1.0000).The earlier the generation with genotype A1 A1,A1 A2,and A2 A2 reached its maximum(1 or 0),the poorer the conservation effect was;The smaller the male to female ratio(1∶4,1∶9,1∶19),the lower the risk of allele A1 being fixed and the frequency of the three genotypes(A1 A1、A1 A2、A2 A2)reached the extreme(1 or 0),and the better the conservation effect was.
关键词
公母比例/威宁牛/原位保种/遗传漂变/计算机模拟Key words
male-female ratio/weining cattle/in-situ conservation/genetic drift/computer simulation引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据