Cytological studies of certain desert mammals of Saudi Arabia 3. The karyotype of Paraechinus aethiopicus.

Al-Saleh, Ahmad M.; Khan, Muhammad Altaf

doi:10.1508/cytologia.50.507

Cited by 3 publications

(4 citation statements)

References 15 publications

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“…This hypothesis was not, however, supported by cytogenetic data, which revealed apparent similarity in karyotype between members of the two clades (2 n = 48, NFa = 88‐90). The karyological results obtained in the present study are relatively close to those found in previous studies on the same species where 2 n = 48, NFa = 92 in both Egypt (Shahin & Ata, 2001) and Saudi Arabia (Al Saleh & Khan, 1984), and 2 n = 50, NF = 90 in Senegal (Granjon et al. , 1992), were found.…”

Section: Discussionsupporting

confidence: 91%

“…The karyological results obtained in the present study are relatively close to those found in previous studies on the same species where 2n = 48, NFa = 92 in both Egypt (Shahin & Ata, 2001) and Saudi Arabia (Al Saleh & Khan, 1984), and 2n = 50, NF = 90 in Senegal (Granjon et al, 1992), were found. These data suggest that chromosomal polymorphism may exist in J. jaculus but it is not related to our concordant genetic and morphological data.…”

Section: Hypothesis 1: Existence Of Two Cryptic Speciessupporting

confidence: 91%

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Are there two cryptic species of the lesser jerboa Jaculus jaculus (Rodentia: Dipodidae) in Tunisia? Evidence from molecular, morphometric, and cytogenetic data

Faleh

Cosson

Tatard

et al. 2010

Biological Journal of the Linnean Society

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Jerboas belonging to the genus Jaculus are widely distributed rodents inhabiting Palearctic desert and semi-desert areas. Previous studies on the lesser Egyptian jerboa Jaculus jaculus showed the existence of various morphological forms of controversial taxonomic status. They were sometimes related to two different species, J. jaculus and Jaculus deserti, although this has not been recognized in recent taxonomic updates. To clarify the systematic status of J. jaculus in Tunisia, we performed molecular (phylogenetic analyses of cytochrome b sequences), morphological (multivariate analyses of 13 skull measurements) and karyotypic (standard preparations from bone marrow cells) analyses on a number of specimens collected from ten localities. Our analyses revealed two monophyletic, well differentiated clades, with a mean genetic divergence value (K2P = 10.9 ± 0.01%), which is within the range of distances generally observed between rodent species. Morphometric analyses clearly separated populations of the two genetic clades from each other. However, karyotypes of individuals from both clades appeared similar. Individuals from both molecular clades/morphometric groups were found in sympatry in most of the localities sampled. These results, as obtained from a restricted area of the total distribution, suggest that there are two separate species within the currently accepted J. jaculus in Tunisia. Alternative hypotheses such as the occurrence of a strong, ancient phylogeographic structure, or the presence of pseudogenes, are also considered to account for the results obtained.

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Section: Discussionsupporting

confidence: 91%

Section: Hypothesis 1: Existence Of Two Cryptic Speciessupporting

confidence: 91%

Are there two cryptic species of the lesser jerboa Jaculus jaculus (Rodentia: Dipodidae) in Tunisia? Evidence from molecular, morphometric, and cytogenetic data

Faleh

Cosson

Tatard

et al. 2010

Biological Journal of the Linnean Society

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“…In J. jaculus the Y chromosome was acrocentric, while it was submetacentric in J. orientalis. AL SALEH and KHAN (1984) found 2n = 48 and NFa = 92 for J. jaculus in Saudi Arabia, the sex chromosomes X and Y being metacentric and acrocentric, respectively. SHAHIN and ATA (2001) showed the two species of Egyptian Jaculus to have 2n = 48 and a FN of 96 in females and 95 in males (corresponding to a NFa of 92).…”

Section: Discussionmentioning

confidence: 89%

Karyotypic Variation in Two Species of Jerboas Jaculus jaculus and Jaculus orientalis (Rodentia, Dipodidae) from Tunisia

Faleh¹,

Othmen²,

Saïd³

et al. 2010

folia biol (krakow)

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GRANJON L. 2010. Karyotypic variation in two species of jerboas Jaculus jaculus and Jaculus orientalis (Rodentia, Dipodidae) from Tunisia. Folia biol. (Kraków) #&: 229-236. The karyotypes of the lesser Egyptian jerboa Jaculus jaculus and the greater Egyptian jerboa Jaculus orientalis from Tunisia are described and compared with available data particularly from Egypt. The species examined have a similar karyotype consisting of 2n = 48 chromosomes and a fundamental number of autosomes (NFa) varying from 88 to 90 in J. jaculus and from 84 to 88 in J. orientalis. The X chromosome is submetacentric in both species, while the Y is submetacentric in J. orientalis and acrocentric in J. jaculus. Most of the autosomes are meta/submetacentric but the small pairs 22 -23 in J. jaculus and 20-23 in J.orientalis are frequently acrocentric, yielding considerable differences in the NFa within and among species. Morphological variation in these small pairs of autosomes and/or in the Y chromosome in J. orientalis may distinguish populations of the two species from Egypt and Tunisia. The differences observed either between Egypt and Tunisia or between the Tunisian Jaculus species are probably associated with chromosomal rearrangements such as pericentric inversions or heterochromatin variation. They appear of lesser magnitude than other changes (especially molecular) that have occurred during the evolution of this genus.

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“…Jotterand-Bellomo, 1984), the rodent fauna of the Saudi Arabia Peninsula in general has received much tess attention in karyological studies (AI-Saleh & Khan, 1984a, b, c, 1985, 1987.…”

Section: Introductionmentioning

confidence: 99%

Cytological studies of certain desert mammals of Saudi Arabia 6.. First report on chromosome number and karyotype of Acomys dimidiatus

Al-Saleh

1988

Genetica

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Cytological studies of certain desert mammals of Saudi Arabia 3. The karyotype of Paraechinus aethiopicus.

Cited by 3 publications

References 15 publications

Are there two cryptic species of the lesser jerboa Jaculus jaculus (Rodentia: Dipodidae) in Tunisia? Evidence from molecular, morphometric, and cytogenetic data

Are there two cryptic species of the lesser jerboa Jaculus jaculus (Rodentia: Dipodidae) in Tunisia? Evidence from molecular, morphometric, and cytogenetic data

Karyotypic Variation in Two Species of Jerboas Jaculus jaculus and Jaculus orientalis (Rodentia, Dipodidae) from Tunisia

Cytological studies of certain desert mammals of Saudi Arabia 6.. First report on chromosome number and karyotype of Acomys dimidiatus

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