摘要
从适合度之比能够衡量杂种优势强弱的角度研究随机交配群体中突变基因r的频率的逐代演变规律,获得3个不动点,结果表明:r的频率能够从较小增长到一定程度的前提是RR的适合度比Rr的小,揭示了在环境改变的情况下RR群体不需隔离也能演变成rr群体的一个机理。
The occurrence frequency of the mutant gene r in the progenies was measured to study the level of heterosis based on fitness. Three fixed points of the frequency were found. A conclusion has been drawn that the occurrence frequency of mutant gene in the progenies can increase from a small number to a large degree under the prerequisite of the fitness of the RR less than that of Rr. It reveals a mechanism of RR groups evolving into rr groups without isolation in the changed environment.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2009年第2期254-256,共3页
Journal of Shenyang Agricultural University
基金
新世纪广西高教改革项目(2006072)
广西教育厅科研项目(200807MS065)
