Chromosome studies of Xiphophorus helleri, Xiphophorus maculatus, and their hybrid

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Celia Donaldson Putnam (Creator)
The University of North Carolina at Greensboro (UNCG )
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Abstract: Xlphophorus helleri, commonly known as the swordtail, and Xlphophorus maculatus, commonly called the platyfish, are different species of the family Poecllildae. . A cross between the platyfish bearing the gene for a dorsal fin spot, and the swordtail yields melanomatous offspring. Since these tumors are colored a dark brown to black and can be readily detected, and since these tumors always appear in the hybrid bearing this gene, they are excellent tools for research aimed at the physiological, histological, and cytological manifestations of cancerous growth. It has been shown then, that the two species do produce some fertile offspring; however, the number of hybrids which are produced is low, as well as the number of offspring of the hybrids. This failure of the melanomatous fish to reproduce does, of course, limit the number available for research and Is detrimental to adequate testing, justifying the need to investigate this problem.

Additional Information

Honors Project
Language: English
Date: 1964

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