Cytogenetic studies in Dictyophorus griseus (Reiche &amp; Fairmaire, 1849) (Orthoptera: Pyrgomorphidae) from Cameroon. II. Karyotype

Akwanjoh, Seino Richard; Manjeli, Y.

doi:10.5251/abjna.2012.3.7.292.295

ABJNA

2012

DOI: 10.5251/abjna.2012.3.7.292.295

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Cytogenetic studies in Dictyophorus griseus (Reiche & Fairmaire, 1849) (Orthoptera: Pyrgomorphidae) from Cameroon. II. Karyotype

Seino Richard Akwanjoh¹,

Y. Manjeli²

Abstract: The detailed karyotype information (chromosome number, morphology and chromosome lengths) of Dictyophorus griseus (Reiche & Fairmaire, 1849), a Pyrgomorphidae grasshopper common to the Western Highlands of Cameroon has been described for the first time. The species revealed a karyotype of 2n♂ = 19 XO acrocentric chromosomes. Chromosome lengths varied from 8.40 to 2.10μm and the haploid set was 43.87 μm. The karyotype revealed 2 large, 4 medium and 4 small chromosomes (2LL -4MM -4SS). The X chromosome was the l… Show more

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Karyotype and meiosis analysis of four species of Cameroonian Pyrgomorphidae (Orthoptera)

Akwanjoh¹

2013

Int. J. Genet. Mol. Biol.

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In this article, the karyotypic features (chromosome number, morphology, size and length and length of X chromosome), and meiosis in Atractomorpha lata, Dictyophorus griseus, Taphronota thaelephora and Zonocerus variegatus (Orthoptera: Pyrgomorphidae: Pyrgomorphinae) were analysed in order to determine similarities and differences amongst them. All four species were cytogenetically similar in relation to chromosome number, morphology and sex mechanism. They revealed karyotypes that comprised of acrocentric chromosomes with complement number 2n = 19 (male) and the XX♀-XO♂ sex mechanism. Chromosomes in the four species occurred in size groups of long, medium and short. The number of chromosomes in the size groups varied with species. Cluster analysis revealed chromosomes 4, 5 and 9 to be comparable in length in all four species and it is suggested that these chromosomes could be marker chromosomes for the subfamily Pyrgomorphinae. The meiotic process in the four species was normal and chiasmate. Similar bivalent shapes were recognized for both Diplotene and first meiotic Metaphase in the four species. Mean chiasma frequency was not significantly different (P>0.05) for A. lata, D. griseus, T. thaelephora but was significantly higher (P< 0.05) for Z. variegatus compared to the other three species.

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Karyotype and meiosis analysis of four species of Cameroonian Pyrgomorphidae (Orthoptera)

Akwanjoh¹

2013

Int. J. Genet. Mol. Biol.

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Cytogenetic studies in Dictyophorus griseus (Reiche & Fairmaire, 1849) (Orthoptera: Pyrgomorphidae) from Cameroon. II. Karyotype

Cited by 1 publication

References 9 publications

Karyotype and meiosis analysis of four species of Cameroonian Pyrgomorphidae (Orthoptera)

Karyotype and meiosis analysis of four species of Cameroonian Pyrgomorphidae (Orthoptera)

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