Degenerating gypsy retrotransposons in a male fertility gene on the Y chromosome of Drosophila hydei

1994 ◽  
Vol 39 (5) ◽  
Author(s):  
Ron Hochstenbach ◽  
Harry Harhangi ◽  
Karin Schouren ◽  
Wolfgang Hennig
Keyword(s):  
Y Chromosome ◽  
Male Fertility ◽  
Drosophila Hydei ◽  
Fertility Gene ◽  
Gypsy Retrotransposons

scholarly journals Transcription of gypsy Elements in a Y-Chromosome Male Fertility Gene of Drosqbhila hydei

Genetics ◽  
1996 ◽  
Vol 142 (2) ◽  
pp. 437-446
Author(s):  
Ron Hochstenbach ◽  
Harry Harhangi ◽  
Karin Schouren ◽  
Petra Bindels ◽  
Ron Suijkerbuijk ◽  
...  
Keyword(s):  
Y Chromosome ◽  
Male Fertility ◽  
Fluorescent In Situ Hybridization ◽  
Primary Spermatocyte ◽  
Transcription Unit ◽  
Major Constituent ◽  
Fertility Gene ◽  
Sequence Types ◽  
Gypsy Retrotransposons

Abstract We have found that defective gypsy retrotransposons are a major constituent of the lampbrush loop pair Nooses in the short arm of the Y chromosome of Drosophila hydei. The loop pair is formed by male fertility gene Q during the primary spermatocyte stage of spermatogenesis, each loop being a single transcription unit with an estimated length of 260 kb. Using fluorescent in situ hybridization, we show that throughout the loop transcripts gypsy elements are interspersed with blocks of a tandemly repetitive Y-specific DNA sequence, ay1. Nooses transcripts containing both sequence types show a wide size range on Northern blots, do not migrate to the cytoplasm, and are degraded just before the first meiotic division. Only one strand of ay1 and only the coding strand of gypsy can be detected in the loop transcripts. However, as cloned genomic DNA fragments also display opposite orientations of ay1 and gypsy, such DNA sections cannot be part of the Nooses. Hence, they are most likely derived from the flanking heterochromatin. The direction of transcription of ayl and gypsy thus appears to be of a functional significance.

Cytogenetic Observations in Infertile Men Working with Insecticidal Compounds

1978 ◽  
Vol 27 ◽  
pp. 51-56 ◽  
Author(s):  
Fiorella Shabtai ◽  
Shlomo Bichacho ◽  
Isaac Halbrecht
Keyword(s):  
Y Chromosome ◽  
Male Fertility ◽  
Reproductive Fitness ◽  
Negative Influence ◽  
Chromosomal Breakage ◽  
Infertile Men ◽  
Chemically Induced ◽  
The Individual ◽  
Chromosomal Variants ◽  
Insecticidal Compounds

The negative influence of some insecticides on male fertility has been noted. We report our cytogenetic observations on a group of infertile insecticide workers. Increased chromosomal breakage was a constant finding and the Y chromosome was especially damaged. This may account for impaired spermatogenesis. Furthermore, the involvement of heterochromatic chromosomal variants both in the individual susceptibility to the chemically induced damage and in the reproductive fitness is emphasized.

A marked ring-Y-chromosome in Drosophila hydei with a new type of white variegation

Chromosoma ◽  
1979 ◽  
Vol 71 (1) ◽  
pp. 1-14 ◽  
Author(s):  
H. Beck ◽  
F. M. A. van Breugel ◽  
Ž. Srdić
Keyword(s):  
Y Chromosome ◽  
Drosophila Hydei ◽  
New Type

Isolation and Characterization of Male Fertility-Related Genes on the Bovine Y Chromosome.

2009 ◽  
Vol 81 (Suppl_1) ◽  
pp. 671-671
Author(s):  
Wansheng Liu ◽  
Yang Yang ◽  
Ti-Cheng Chang
Keyword(s):  
Y Chromosome ◽  
Male Fertility ◽  
Isolation And Characterization

FERTILITY COMPENSATION OF CORNERSTONE MALE STERILITY OF WHEAT BY RYE

Genetics ◽  
1983 ◽  
Vol 104 (1) ◽  
pp. 181-189
Author(s):  
M A Hossain ◽  
C J Driscoll
Keyword(s):  
Male Sterility ◽  
Male Fertility ◽  
Wheat Chromosome ◽  
Hybrid Wheat ◽  
Specific Expression ◽  
Entire Chromosome ◽  
Chromosome Arm ◽  
Fertility Gene

ABSTRACT The genome of rye is known to compensate for the lost male-fertility gene(s) of wheat chromosome arm 4Aα in the Cornerstone male-sterility mutant. A search for the rye chromosome(s) involved in this compensation showed that chromosomes 2R and 4R are responsible. Only the short arms of these two chromosomes are the operative ones. Chromosome arm 4RS compensates in an erratic way, whereas 2RS compensates in a full and consistent way. The entire chromosome 2R compensates less well than the 2RS telocentric which reflects an antifertility factor(s) on 2RL. This may be a specific expression of the 2R genes for poor vigor which are located on only the long arm. 2RS will be a valuable piece of chromatin for the XYZ system of producing hybrid wheat.

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