因子与巢式交配设计群体近交率的比较研究  

Comparison of Inbreeding Rates between factorialand Nested mating System

作　　者：张泽[1,2] 张泽[1,2] 罗泽伟[3] 鲁成[1] 向仲怀 

机构地区：[1]西南农业大学蚕桑学农业部部级重点实验室,重庆北碚400716 [2]西南农业大学农学系,重庆北碚400716 [3]复旦大学遗传学研究所,上海200433

出　　处：《Acta Genetica Sinica》1999年第2期119-125,共7页

基　　金：复旦大学遗传学国家重点实验室开放基金

摘　　要：探讨了因子和巢式交配设计群体近交率的形成机理，结果表明，这两种交配设计群体结构本身并不导致其近交率累积的差异。在育种选择情况下因子交配设计比巢式设计群体的近交率上升慢，而在完全随机留种和限制随机留种情形这两种交配设计对群体近交率的影响没有差异。但在交配设计情况下，限制随机留种比完全随机留种能有效地控制群体近交率的提高。这一结果显示，在动物和家畜遗传资源保存中，除了考虑群体大小和留种的雌雄比例外，引入交配设计并辅以适当的留种方式，可以有效减缓繁育群体近交系数的上升，从而达到推迟或者避免基因消失或固定的目的。he effect of factorial and nested mating systems on the rates of inbreeding areconsidered for the animal breeding and genetic resounes conservation schemes. In thebreeding selection population, result showed that the new inbreeding for factorialmating system is less than nested mating system. Howevet, in the Fopulations ifcomplete random selecting Parents and restriction on the random selecting parents there are no differences of the new inbreeding for two mating systems.Under themating systems,the new inbreeding for restriction on the random selecting Parents isless than complete random selecting parents.This result indicated that apart fromconsidering the size of animal genetic resources conservation population and ratio offemales and males, the mating system and method of properiy selecting parents shouldbe adopted so as to decrease the rate of inbreeding in practice.

关 键 词：动物 育种 因子式交配设计 巢式交配设计 近交率 

分 类 号：Q347[生物学—遗传学]