89C2-89C3;96A18-96A19
89D;96A
89C;96A
89C2-89C3;96A18-96A19
89C-89D;96A
89C2-89C3;96A1-96A9
Homozygous viable.
Crossing over reduced in heterozygous females to 1% between p and sr, none between sr and ro and 0.5% between ro and ca.
Payne, July 1917.
One of 16 polymorphic inversions identified in the Drosophila Genetic Reference Panel (DGRP) freeze 2 lines.
Reported for an Indian population.
Cosmopolitan inversion. Isolation: Aleman, Mexico. Isolation: Cordaba, Mexico.
Recovered as: Cosmopolitan inversion.
Isolation: Koleika, Greece.
widespread
In(3L)P (63B8-9;72E1-2) and In(3R)P (89C2-3;96A18-19) are found on the same chromosome in natural populations. At least three symbols have been given to this combination of inversions: "C(3)x" (no additional markers; also known as In(3LR)C3x or just C3x), "LVM" (with markers l(3)LVML[1] pe[1] l(3)LVMR[1] Po[LVM]), and "Payne" (no additional markers).
Often combined with another inversion on the opposite chromosome arm to produce a full chromosome balancer.
Naturally occurring inversions have been categorised into classes according to their geographical distribution and frequencies, In(3R)P belongs to the common Cosmopolitan class.
In(3R)P increases the rate of recombination at the base of the X chromosome, but does not affect the rate of recombination at the tip of the X chromosome.
Common cosmopolitan inversion.
In(3R)P inversion polymorphism is maintained by strong balancing selection involving a heterozygous advantage.
Distribution in Indian populations studied.
Common cosmopolitan inversion. The distribution of this inversion in two populations from Valencia, Spain (one from a cellar and one from a vineyard) has been studied.
Cosmopolitan inversion.
Common cosmopolitan inversion (based on Australasian frequencies of distribution).
Widespread in laboratory stocks and is part of the balancers, LVM and C(3)x. Also found in many wild populations (e.g., Warters, 1944, Texas Univ. Publ. 4445: 129-74; Oshima and Watanabe, 1965, D. I. S. 40: 88; Ashburner and Lemeunier, 1976, Proc. R. Soc. London, B 193: 137-57; Stalker, 1976, Genetics 82: 323-47; Choi, 1977, D. I. S. 52: 88; 1977, Genetica 47: 155-60; Knibb, 1982, Genetica 58: 213-21).
The breakpoints in In(3R)P are not simple cut-and-paste structures; gene fragments and small duplications of DNA are associated with both breaks. The distal breakpoint of In(3R)P breaks the tok gene and the proximal breakpoint of In(3R)P breaks the CG31279 gene and the tld gene. Functional copies of all three genes are found at the opposite breakpoints. In(3R)P may have arisen by inversion of a region of a Standard (St) chromosome and replacement of a smaller chromosomal region of its sister chromosome. this would have resulted in duplication of the regions flanking both breakpoints and prevented the fragmentation of genes at the breakpoints being lethal mutations.
All limits from polytene analysis (FBrf0029349)