Crossing-over between Y chromosomes: another possible source of phenotypic variability in the guppy, Poecilia reticulata Peters
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2008, Vol 1, Issue 1
Abstract
Genetic linkage acting through crossing-over between X and X chromosomes, X and Y chromosomes, and autosomal gene ecombination are the most important sources of color pattern polymorphisms in animals. Variability in male color patterns and fin morphologies in the guppy, Poecilia reticulata, a ivebearing fish is an example of extreme pattern polymorphism. We explored the possibility that crossing-over between Y chromosomes can also contribute to the high degree of pattern polymorphism in guppies because YY individuals are easily induced in the laboratory. However, note that YY individuals are also produced in natural populations. Our results indicated that YY crossing-over was another important source of phenotypic variability - probably because recombination may be possible over the entire length of Y chromosomes, and at very high frequencies due to high degrees of homology. Thus, crossing-over between Y hromosomes is yet another mechanism that can contribute to extreme pattern polymorphism in the guppy, a popular aquarium and important research model species.
Authors and Affiliations
Valentin Petrescu-Mag, Godfrey Bourne
Keywords
Related Articles
- EP ID EP113053
- DOI -
- Views 109
- Downloads 0
Preliminary study on the natural extenders for artificial breeding of African catfish Clarias gariepinus (Burchell, 1822).
The objective of the present study was to determine the most suitable extender and their respective dilution ratios for African catfish sperm for artificial induced breeding and cryopreservation purposes. Three natural e...
Increasing of survival rate to Acipenser persicus by added Clinoptilolite zeolite in acute toxicity test of ammonia
The experiments were done to increase the survival rate to Acipenser persicus by added Clinoptilolite zeolite in lethal concentration of ammonia. Twelve fishes with average weight 26 ± 3 g were exposed to different conce...
The human impact on benthic community structure and dynamics of different ecosystems from Lunca Mureșului Nature Park (West of Romania).
The anthropic impact, which takes various forms, changes the water quality parameters and disturb the living environment of benthic macroinvertebrates. The present study aims to track the way pollution sources influence...
Deciphering the Galaxy Guppy phenotype.
Animal breeding hobbyists have been useful to science because they identify and isolate color coat mutations that geneticists can in turn use in their studies of the development and differentiation of color cells. This p...
The enhancement of growth parameters in common carp (Cyprinus carpio) larvae using probiotic in rearing tanks and feeding by various Artemia naupli
In probiotic trials the blend of Bacillus circulans and Bacillus licheniformis were added in rearing tanks of common carp at a concentration of 1×10[sup]3[/sup]CFU mL[sup]-1[/sup]. Artemia urmiana (Gunther, 1899),Artem...