The recognition and incidence of haploid and polyploid spermatozoa in man, rabbit and mouse.

Journal of Reproduction and Fertility
A D Carothers, R A Beatty

Abstract

The existence of polyploid mammalian spermatozoa has been inferred from studies of Feulgen-DNA absorption. Rabbit spermatozoa fell into two discrete groups with mean absorptions close to a 1:2 ratio (inferred to be haploids and diploids respectively); simple visual appraisal of the size of the head or nucleus gave an identical classification. The incidences of ploidy classes were 98-94% haploid, 1-06% diploid, 0-00% higher than diploid (N = 3010; from DNA measurements and visual appraisal of the size in a rabbit chosen to have a high incidence of diploids) and, correspondingly, 99-691%, 0-308%, 0-001% (N = 138001; from sixty-nine unselected rabbits, scored by visual appraisal of the size of the sperm head). In man also, virtually discrete groups with absorptions close to a 1:2 ratio existed and were inferred to be haploids and diploids respectively. A few human spermatozoa were found with absorptions corresponding to a ploidy of three and/or four. Visual appraisal of the size of the human sperm nucleus as Small, Medium or Large was only a partial guide to ploidy. All Small human spermatozoa measured for DNA absorption were found to be haploid. About two-thirds of Medium human spermatozoa were found, however, to be haploid, and ...Continue Reading

Citations

Jul 15, 1996·Theriogenology·D LechniakM Sosnowski
Apr 1, 1989·Gamete Research·J G Burkhart, H V Malling
Dec 1, 1996·The Japanese Journal of Human Genetics·H HuK Ohama
Jan 1, 1979·Archives of Andrology·D Mortimer
Jan 1, 1979·Archives of Andrology·D Mortimer
Jan 1, 1981·Acta Radiologica. Oncology·U HackerK Müller
Jan 1, 1981·American Journal of Primatology·Hector N Seuánez
Jan 1, 1990·Archives of Andrology·S Jager
Jul 30, 2020·Reproduction in Domestic Animals = Zuchthygiene·Dominik FischerMichael Lierz

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