Karyological survey of Indian ants.

Imai, Hirotami T.; Urbani, C. Baroni; Kubota, Masao; Sharma, Geeta; Narasimhanna, M. N.; Das, Bhagwan; Sharma, Archana; Deodikar, G. B.; Vaidya, V. G.; Rajasekarasetty, M. R.

doi:10.1266/jjg.59.1

Cited by 42 publications

(38 citation statements)

References 30 publications

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“…2) Chromosome preparation Chromosome materials were prepared using an improved version of the air-drying technique developed progressively by Imai et al (1977), and Imai et al (1984a). This yields high-quality conventional metaphase figures and C-banded karyotypes, without subsequent treatment.…”

Section: ) Organismsmentioning

confidence: 99%

Modes of spontaneous chromosomal mutation and karyotype evolution in ants with reference to the minimum interaction hypothesis.

Imai

Taylor²,

Crosland

et al. 1988

The Japanese journal of genetics

266

234

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Aspects of chromosomal mutation and karyotype evolution in ants are discussed with reference to recently accumulated karyological data, and to detailed karyotype analyses of several species or species complexes with low chromosome number and unusual chromosomal mutations (the complexes of Myrmecia pilosula (Smith) (n=1, 5 or 9 to 16); M. piliventris Smith (n=2, 3-4, 17 or 32), and Ponera scabra Wheeler (n=3 or 4, 2n=7 or 8)). Translocations and Robertsonian polymorphisms are confirmed to be non-randomly distributed among ants -the former are found at high frequencies in species with low chromosome numbers (n<_ 12), while the latter predominate in those with high numbers (n> 12). This situation is consistent with the minimum interaction hypothesis of , under which translocations are expected to occur most frequently in low-numbered karyotypes, and that the resulting genetic risks are minimized by increases in chromosome and/or arm numbers through centric fission and pericentric inversion. Centric fusion is considered to be a transient event in karyotype evolution, resulting from telomere instability in acrocentric chromosomes.

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Section: ) Organismsmentioning

confidence: 99%

Modes of spontaneous chromosomal mutation and karyotype evolution in ants with reference to the minimum interaction hypothesis.

Imai

Taylor²,

Crosland

et al. 1988

The Japanese journal of genetics

266

234

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“…The dry or alcohol specimens of these wasps were preserved by Hoshiba. The chromosomal preparations were made following the air-drying technique of Imai et al (1984) with slight modifications. A brief outline is as follows:…”

Section: Chromosomesmentioning

confidence: 99%

“…6b) (for details see Crozier, 1975;Imai et al, 1977Imai et al, , 1984. Imai et al (1988a) divided ants into two groups, (1) species having low numbers of chromosomes (n S 12) and (2) species with high numbers (n>12), based on the cytological evidence that translocation polymorphisms appear preferentially in the former, while Robertsonian polymorphisms predominate in the latter.…”

Section: Genus Vespulamentioning

confidence: 99%

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Karyotype evolution in the social wasps (Hymenoptera, Vespidae).

Hoshiba

Matsuura

Imai

1989

The Japanese journal of genetics

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The chromosomes of 21 species of Vespidae (consisting of 9 polistines and 12 vespines) were compared using an air-drying technique.The haploid number of the Polistinae ranged broadly (n=14, 22, 23, 26, 30, 31, and 34), while it was either n=25 or n=26 in the Vespinae. There were no karyological homologies (in terms of marker chromosomes) between these two subfamilies. Some phylogenetic relationships of social wasps were discussed, based on the karyological literature now available (32 species). We suggested that the three genera of Vespinae (Dolichovespula, Vespa, and Vespula) would have differentiated in two different ways from a common ancestor having 27 acrocentrics (n=27) by tandem fusion (the first genus with n=26) and by two centric fusions (the latter two genera with n=25).In the genus Polistes, the 5 subgenera (Fuscopolistes, Aphanilopterus, Megapolistes, Polistella, and Polistes) would have evolved independently toward increasing chromosome numbers since they started to separate from their ancestor having n=9-14.

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“…97 76; Imai, Baroni-Urbani et al 1984), and Monomorium latinode Mayr (Myrmicinae: Solenopsidini) (2n--70; Imai, Baroni-Urbani et al 1984).…”

Section: Resultsmentioning

confidence: 99%

Notes on the Remarkable Karyology of the Primitive Ant Nothomyrmecia Macrops, and of the Related Genus Myrmecia (Hymenoptera: Formicidae)

Imai

Taylor

Kubota³

et al. 1990

Psyche: A Journal of Entomology

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Karyological survey of Indian ants.

Cited by 42 publications

References 30 publications

Modes of spontaneous chromosomal mutation and karyotype evolution in ants with reference to the minimum interaction hypothesis.

Modes of spontaneous chromosomal mutation and karyotype evolution in ants with reference to the minimum interaction hypothesis.

Karyotype evolution in the social wasps (Hymenoptera, Vespidae).

Notes on the Remarkable Karyology of the Primitive Ant Nothomyrmecia Macrops, and of the Related Genus Myrmecia (Hymenoptera: Formicidae)

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