Chromosome number and development of progeny of triploid axolotl males crossed with diploid females

Fankhauser, Gerhard; Humphrey, R. R.

doi:10.1002/jez.1401260104

Cited by 30 publications

(2 citation statements)

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“…nigromaculata produced some viable spermatozoa (Kawamura, 195 1 ;Kawamura & Tokunaga, 1952). Eggs fertilized with sperm from triploid frogs (Kawamura, 1951) and from axolotls (Fankhauser & Humphrey, 1954) showed good survival in the early stages of development, and this was also seen in embryos from the reciprocal cross between triploid female axolotls mated with diploid males which survived well up to the tailbud stage (Fankhauser & Humphrey, 1950).…”

Section: Discussionmentioning

confidence: 99%

Sexual maturation in triploid male plaice (Pleuronectes platessa) and plaice x flounder (Platichthys flesus) hybrids

Lincoln

1981

Journal of Fish Biology

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Triploid male plaice, Pleuronectes platessa, and plaice x flounder, PlatichthysJlesus, hybrids produced from cold-shocked eggs were reared to maturity at three years ofage. The testes of triploid hybrids were similar in macroscopic appearance and size to those from control fish but in histological section spermatocyte and spermatid cell formation was grossly abnormal. In two fish the majority of cells appeared to be aborted spermatids and spermatocytes although there were some spermatozoa with enlarged heads and thick bent flagellae.The testes of mature triploid plaice were similar to controls both in shape and size and in histological section. Spermatocyte and spermatid cell formation was normal, apart from an increase in cell and nuclear size, and fully motile spermatozoa were produced from several fish. Plaice eggs fertilized with semen from triploids showed a slight reduction in fertility compared with controls but developed normally to gastrulation with little mortality. Beyond gastrulation there was increasing mortality associated with abnormalities in the appearance of embryos. Few hatched and none of these survived longer than 48 h. The value of triploidy in fish farming is briefly discussed.

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Section: Discussionmentioning

confidence: 99%

Sexual maturation in triploid male plaice (Pleuronectes platessa) and plaice x flounder (Platichthys flesus) hybrids

Lincoln

1981

Journal of Fish Biology

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“…It is found sporadically in higher plants (Huskins, 1948) and has been reported as occurring during metamorphosis in the hind gut of the mosquito Culex pipiens (Grell, 1946); in the latter case, cells which have become highly polyploid as the result of endomitosis are brought back to an octoploid or tetraploid state. In his analysis of somatic crossing over in Drosophila, Stern (1936) found no evidence for somatic reduction, nor did Fankhauser & Humphrey (1954) in the axolotl. Two, at least, of the mosaics described above cannot be explained in terms of somatic reduction.…”

Section: Mosaics In Heterozygotesmentioning

confidence: 97%