Levitan M, Scheffer S J
Department of Cell Biology and Anatomy, Mount Sinai School of Medicine, City University of New York, New York 10029.
Genet Res. 1993 Feb;61(1):9-20. doi: 10.1017/s0016672300031062.
Data are presented concerning the gene arrangements in the second and third chromosomes of Drosophila robusta in eight altitudinal transects. A consistent change is the increase in the arrangement 2L-3, particularly in the linkage combination 2L-3.2R, with increasing altitude. The reciprocal decrease with increasing altitude affects several different 2-left arrangements, most consistently 2L-1. The arrangements of 2-right show no significant variation with altitude, and those of 3-right do so only in a few samples of the two northern transects studied, none in any of the southern ones. These results confirm previous evidence for the significant role of the arrangements of the left arm of the second chromosome in the adaptations of this species to altitude and suggest further that interactions of linked arrangements are involved in these adaptations. The data also indicate that the factors responsible for the altitudinal adaptations of this species are in many cases not the same ones that are responsible for variations in its gene arrangements with latitude.
本文呈现了关于粗壮果蝇（Drosophila robusta）八个海拔样带中第二和第三染色体基因排列的数据。一个一致的变化是排列2L-3的增加，特别是在连锁组合2L-3.2R中，随着海拔升高而增加。随着海拔升高的相应减少影响了几种不同的2-左排列，最一致的是2L-1。2-右的排列在海拔上没有显著变化，3-右的排列仅在所研究的两个北部样带的少数样本中有变化，南部样带的样本中则没有。这些结果证实了先前的证据，即第二染色体左臂的排列在该物种对海拔的适应中起重要作用，并进一步表明连锁排列的相互作用参与了这些适应。数据还表明，该物种海拔适应的因素在许多情况下与导致其基因排列随纬度变化的因素不同。
