Meiosis in Male Chorthippus

  • Bernard John
  • Kenneth R. Lewis
Part of the Protoplasmatologia book series (PROTOPLASMATOL., volume 6 / F / 1)


In the species of the genus Chorthippus, as in a majority of the genera in the sub-family Truxalinae, the mitotic chromosome complement of the male includes seventeen members. Sixteen of these are autosomes and can be matched into eight homologous pairs; the seventeenth chromosome is unpaired and represents a sex or X-chromosome. All these elements are individually distinguishable (Fig. 1). Six of the autosomes are metacentric and these are the longest chromosomes in the complement (pairs L1–L3); the remainder are acrocentric and include one pair of small chromosomes (S 8) and a range of medium pairs (M4–M7). The unpaired X-chromosome is the longest of the acrocentrics.

Fig. 1

C-mitosis in a spermatogonial cell of Chorthippus brunneus, 2n = 16 + X (orcein, ca. ×2000).

Figs. 2 and 3

Leptotene (Fig. 2, orcein, ca. ×1000) and zygotene (Fig. 3, phase contrast, unstained ca. ×1200) in Chorthippus brunneus. Note single threads at leptotene (arrows) and paired threads at zygotene (arrow).


Spindle Pole Spindle System Chiasma Formation Longe Chromosome Diplotene Stage 
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Copyright information

© Springer-Verlag/Wien 1965

Authors and Affiliations

  • Bernard John
    • 1
  • Kenneth R. Lewis
    • 2
  1. 1.Department of GeneticsThe UniversityBirminghamEngland
  2. 2.Botany SchoolThe UniversityOxfordEngland

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