首页 | 本学科首页   官方微博 | 高级检索  
     

突变基因的积累与生殖隔离形成的一个途径(英文)
引用本文:韦文惠. 突变基因的积累与生殖隔离形成的一个途径(英文)[J]. 农业科学与技术, 2010, 11(3): 4-6,46
作者姓名:韦文惠
作者单位:柳州职业技术学院,广西柳州545006
基金项目:广西教育厅科研项目,广西高校优秀人才资助计划项目 
摘    要:通过用RR、Rr和rr3种基因型的适合度之比量化R与r基因在后代中的频率,计算r的频率逐代演变的分岔点,研究随机交配群体中的杂合子适合度低于纯合子适合度的突变基因r在群体中的逐代积累过程。揭示了R与r在遗传中的不相容性;遗传漂变能使r在新群体中有较高的频率,超过分岔点,最终形成生殖隔离;同时生物进化的动力仅有突变、遗传漂变、自然选择这3个条件还不够,还需要有杂合子适合度低于纯合子适合度的突变基因,即原有群体的遗传背景对新突变的排斥作用。

关 键 词:生殖隔离  适合度  突变基因  杂合子  分岔点

Accumulation of Mutant Genes and Its Pathway with Reproductive Isolation
WEI Wen-hui. Accumulation of Mutant Genes and Its Pathway with Reproductive Isolation[J]. Agricultural Science & Technology, 2010, 11(3): 4-6,46
Authors:WEI Wen-hui
Affiliation:WEI Wen-hui Liuzhou Vocational Institute of Technology,Liuzhou 545006
Abstract:According to the fitness of heterozygote was lower than homozygote among panmictic population,the process of generational accumulate of mutant gene r was considered.Branch point of r's frequency by generational evolution which revealed the hereditary incompatibility between R and r,was worked out,and it was found that genetic drift can make r have higher frequency to surpass the branch point to form reproductive isolation.It was not enough to have the three conditions of mutation,genetic drift and natural selection to be the drive of biological evolution;hybrid weakness,the repelling interaction between the genetic background of original population and the new mutation,were also needed.
Keywords:Reproductive isolation  Fitness  Mutant gene  Heterozygote  Branch point
本文献已被 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号