EVOLUTIONARY HISTORY OF DROSOPHILA-BUZZATII .2. HOW MUCH HAS CHROMOSOMAL-POLYMORPHISM CHANGED IN COLONIZATION
EVOLUTIONARY HISTORY OF DROSOPHILA-BUZZATII .2. HOW MUCH HAS CHROMOSOMAL-POLYMORPHISM CHANGED IN COLONIZATION
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DOI：
10.1111/j.1558-5646.1982.tb05450.x
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发表时间：
1982-01-01
期刊：
影响因子：
3.3
通讯作者：
ALONSO, G
中科院分区：
文献类型：
--
作者：
FONTDEVILA, A;RUIZ, A;ALONSO, G
本文研究了阿根廷杜父鱼祖先地区几个自然群体的染色体多态性。布萨提。这种多态性表现出地理分化，在几个地方有一些特色的安排。大多数这种多态性在旧大陆的殖民人群中得到了保持，但也产生了频率的显着变化。排序的定量方法表明，原始和殖民人口的区别，特别是由一个更高的第4染色体多态性在后者的人群中的存在。这种分化是由创始人的影响，并可能通过适应新的寄主植物已经存在于旧世界殖民化之前解释。
Chromosomal polymorphism was studied in several natural populations of the ancestral Argentinian area of D. buzzatti. This polymorphism shows geographical differentiation, with some characteristic arrangements in several localities. Most of this polymorphism has been maintained in colonized populations of the Old World, but significant changes in frequencies have also been produced. Quantitative methods of ordination have shown that original and colonized populations are differentiated, especially by the presence of a much higher 4th chromosome polymorphism in the latter populations. This differentiation is explained by founder effects and probably by adaptation to new host plants already present in the Old World before colonization.