FREQUENCIES AND ALLELISM OF LETHAL FACTORS WITHIN AND BETWEEN GENE ARRANGEMENTS. I. SAN JACINTO MOUNTAINS
FREQUENCIES AND ALLELISM OF LETHAL FACTORS WITHIN AND BETWEEN GENE ARRANGEMENTS. I. SAN JACINTO MOUNTAINS
复制标题
基因排列内部和之间致命因子的频率和等位性。
DOI：
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发表时间：
1961
期刊：
影响因子：
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通讯作者：
R. Mattoni
中科院分区：
文献类型：
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作者：
C. Epling;V. E. Tinderholt;R. Mattoni
这份报告将包括果蝇第三染色体某些倒位重排的致死染色体频率的差异，以及它们在不同环境中的等位基因程度。这第一篇论文将主要讨论在加利福尼亚州南部圣哈辛托山脉发现的安排。第二个将主要处理在危地马拉发现的安排。三分之一的人将比较某些排列之间的突变率。众所周知，果蝇种群携带着相当多的隐性常染色体致死基因(Wright，Dobzansky和Hovanitz，1942)。此外，该物种的第三条染色体经历了一系列倒置，导致了22种不同的基因排列。这些排列的杂合子之间的杂交实际上是被抑制的(Dobzansky和Eving，1948；Levine和Levine，1954)。排列的改变也可能显著改变不同结构纯合子中特定位点的交叉频率(未发表的数据)。因此，每种排列倾向于在其种群中作为一个离散的不同的连锁群保存。最后，这几种排列在物种范围内的不同环境中以不同的频率发生(Dobzhansky和Eving，1944)。在一个给定的采集地点，每一种排列的频率都有波动，但它们的相对频率的模式在许多世代以来在已经被
This report will subsume the differences in frequency of lethal chromosomes among certain inversion rearrangements of the third chromosome of Drosophila pseudoobscura, together with their degrees of allelism in different environments. This first paper will deal chiefly with arrangements found in the San Jacinto Mountains, southern California. A second will deal chiefly with arrangements found in Guatemala. A third will compare mutation rates between certain arrangements. Populations of Drosophila pseudoobscura are known to carry a considerable load of recessive autosomal lethals (Wright, Dobzhansky, and Hovanitz, 1942). Furthermore, the third chromosome of this species has undergone a series of inversions which have resulted in 22 different gene arrangements. Crossing over between the heterozygotes of these arrangements is virtually suppressed (Dobzhansky and Epling, 1948; Levine and Levine, 1954). A change of arrangements may also significantly change the frequencies of crossing over at certain loci in different structural homozygotes (unpublished data). Thus, each arrangement tends to be preserved in its population as a discrete and different linkage group. Finally, the several arrangements occur at different frequencies in different environments within the species range (Dobzhansky and Epling, 1944). Each arrangement fluctuates in frequency at a given collecting site, but the pattern of their relative frequencies has remained not dissimilar for many generations at the sites that have been