Spermatogenesis of diploid males in the formicine ant, Lasius sakagamii

The diploid chromosome number in the female formicine ant, Lasius sakagamii, is 30, while the haploid number in normal males is 15. Six of the 30 studied colonies (20%), however, contained many diploid males. Although the body size of the diploid males was, on average, larger than that of the haploi...

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Bibliographic Details
Published in:Insectes sociaux 2001-01, Vol.48 (1), p.28-32
Main Authors: YAMAUCHI, K, YOSHIDA, T, OGAWA, T, ITOH, S, OGAWA, Y, JIMBO, S, IMAI, H. T
Format: Article
Language:English
Subjects:
Biological and medical sciences
Formicidae
Fundamental and applied biological sciences. Psychology
Insecta
Invertebrates
Lasius sakagamii
Morphology. Histology. Cytology
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Summary:The diploid chromosome number in the female formicine ant, Lasius sakagamii, is 30, while the haploid number in normal males is 15. Six of the 30 studied colonies (20%), however, contained many diploid males. Although the body size of the diploid males was, on average, larger than that of the haploid males, both types of males showed normal external and internal morphologies. Furthermore, there was no reduction in chromosome numbers in either diploid or haploid males during spermatogenesis. The spermatid nuclei of diploid males, however, were significantly larger than those of haploid males, and the amount of DNA in the diploid males, as measured by flow cytometry, was twice as much as that in the haploid males, clearly indicating that diploid males produce diploid sperm.
ISSN:0020-1812
1420-9098
DOI:10.1007/pl00001741