The cytology of achiasmatic meiosis in the female Tigriopus (copepoda)

Chromosoma ◽  
1962 ◽  
Vol 13 (5) ◽  
pp. 526-539 ◽  
Author(s):  
Abbas H. Ar-rushdi
Keyword(s):  
Achiasmatic Meiosis

Male achiasmatic meiosis in Caraboidea (Coleoptera, Adephaga)

Genetica ◽  
1981 ◽  
Vol 57 (2) ◽  
pp. 131-137 ◽  
Author(s):  
J. Serrano
Keyword(s):  
Achiasmatic Meiosis

Organization and Behavior of the Synaptonemal Complex during Achiasmatic Meiosis of Four Buthid Scorpions

2015 ◽  
Vol 144 (4) ◽  
pp. 341-347 ◽  
Author(s):  
Marielle C. Schneider ◽  
Viviane F. Mattos ◽  
Leonardo S. Carvalho ◽  
Doralice M. Cella
Keyword(s):  
Synaptonemal Complex ◽  
Achiasmatic Meiosis ◽  
And Behavior

Achiasmatic meiosis and complex heterozygosity in female cyclopoid copepods (Copepoda, Crustacea)

Chromosoma ◽  
1979 ◽  
Vol 71 (2) ◽  
pp. 227-236 ◽  
Author(s):  
C. C. Chinnappa ◽  
Reginald Victor
Keyword(s):  
Achiasmatic Meiosis

Chiasmatic and achiasmatic meiosis in African Eumastacid grasshoppers

Chromosoma ◽  
1965 ◽  
Vol 16 (3) ◽  
pp. 271-307 ◽  
Author(s):  
M. J. D. White
Keyword(s):  
Achiasmatic Meiosis

Karyotype and achiasmatic female meiosis in Helicoverpa armigera (Hübner) and H. punctigera (Wallengren) (Lepidoptera: Noctuidae)

Genome ◽  
1989 ◽  
Vol 32 (6) ◽  
pp. 967-971 ◽  
Author(s):  
Jennifer H. Fisk
Keyword(s):  
Helicoverpa Armigera ◽  
Pest Species ◽  
Female Meiosis ◽  
Cytological Evidence ◽  
Important Pest ◽  
Helicoverpa Armígera ◽  
Achiasmatic Meiosis ◽  
Lepidoptera Noctuidae ◽  
Helicoverpa Armigera Hubner ◽  
Metaphase I

The economically important pest species Helicoverpa armigera and H. punctigera have a karyotype consisting of 31 pairs of chromosomes. The chromosomes are in a graded series of sizes such that pairs cannot be differentiated. Cytological evidence suggests that female meiosis is achiasmatic. Precocious separation of bivalents into univalents at metaphase I was observed in some spermatocytes of H. punctigera. This species also had a consistently greater number of bivalents with fully terminalised chiasmata in each spermatocyte at male metaphase I than H. armigera.Key words: Lepidoptera, Helicoverpa, achiasmatic meiosis, karyotype.

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