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Palla: A hereditary vertebral deformity in the guppy, Poecilia reticulata Peters (Pisces, Osteichthyes)

✍ Scribed by E. Lodi

Publisher: Springer Netherlands
Year: 1978
Tongue: English
Weight: 656 KB
Volume: 48
Category: Article
ISSN: 0016-6707
DOI: 10.1007/bf00155570

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✦ Synopsis

Some abnormal phenotypes have appeared in cultures of the guppy, Poecilia reticulata Peters, which had previously been treated with dilute formalin solutions. ,They showed a much shortened body and in some instances an almost spherical shape, which is particularly evident in females. Histological examination showed the presence of fused vertebrae in affected individuals. It has been shown that this anomaly is hereditary and it is due to a new autosomal gene, which has been named palla (gene symbol PI), and is dominant, with highly variable expressivity: palla males are usually unable to inseminate either normal or palla females. The homozygous mutants normally die at birth or in early life, none reach sexual maturity, hence the palla mutation is a recessive lethal.

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