Chromosomes of Aphid Fauna from North-western Himalayas, India.

Dutta, J.; Gautam, D. C.

doi:10.1508/cytologia.58.367

Cited by 7 publications

(12 citation statements)

References 9 publications

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“…The other five species of aphids (Table 2), collected from the host plants other than earlier recorded, revealed 2n=8 in A. craccivora, A. fabae and A. nasturtii in the tribe Aphidini, 2n= 16 in Brevicoryne brassicae and 2n=12 in Myzus ornatus in the tribe Macrosiphini, confirming the earlier findings of Dutta and Gautam (1993) from this region.…”

Section: Resultssupporting

confidence: 87%

“…19) constructed for this species shows one long, three medium and two short pairs of chromosomes. Recently Dutta and Gautam (1993) reported the diploid chromosome number in other species of this genus from this region. They reported 2n=12 in Sitobion sp.…”

Section: Resultsmentioning

confidence: 99%

“…At present, over 4000 species of aphids have been reported the world over and chromosomes of about 20% of these species have been reported by different workers (see Gautam et al 1993). In a very recent study on the chromosomes of aphids from North-western Himalayas, Dutta and Gautam (1993) reported the chromosomes of 52 aphid species. These studies were further extended and in this paper we report and discuss karyotypes of ten more species of aphids from this region including new chromosome data for two species.…”

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confidence: 99%

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Karyotypic Studies on Aphids from Himachal Pradesh (North-western Himalayas), India.

Kapoor

Gautam

1994

CYTOLOGIA

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confidence: 87%

Section: Resultsmentioning

confidence: 99%

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Karyotypic Studies on Aphids from Himachal Pradesh (North-western Himalayas), India.

Kapoor

Gautam

1994

CYTOLOGIA

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“…Altogether, 55 species of this genus have so far been investigated cytologically [3,11,12,14,17,19]. The genus Aphis seems to be characterized by the chromosome number of 2n=8, although some exceptions have been reported e.g.…”

Section: Resultsmentioning

confidence: 99%

Karyotype studies on some commonly occurring aphid species

Samkaria

Bala

Gautam

2010

Nucleus

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Karyotypic analysis was carried out from ten most commonly occurring aphids, namely Aphis gossypii (2n=8), Aphis nasturtii (2n=8), Aulacorthum solani (2n= 10), Aulacorthum sp. (2n=12), Greenidea formosana (2n= 18), Macrosiphoniella sp. (2n=12), Macrosiphum rosae (2n=10), Myzus persicae (2n=12), Rhopalosiphum maidis (2n=8) and Toxoptera aurantii (2n=8), infesting different host plants from Kangra and Shimla regions of Himachal Pradesh, India.

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“…Of these, chromosomes of 750 aphid species have been recorded (Robinson and Chen 1969, Kuznetsova and Shaposhnikov 1973, Gut 1976, Blackman 1980a, 1986, Chen and Zhang 1985a. Chromosomes of aphids fauna of Himachal Pradesh have been investigated by several workers (Dutta and Gautam 1993, Kapoor and Gautam 1994, Gautam and Dutta 1994, Gautam and Kapoor 2002, Gautam and Dhatwalia 2003, Gautam and Kumari 2003, Gautam and Kumar 2006 and in many cases karyotypic variations were reported. Keeping in view the frequent occurrence of karyotypic variations in aphids, it was considered appropriate to investigate the chromosomes of willow aphids in different populations from Himachal Pradesh, India.…”

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Cytogenetic Studies on Willow Aphids

Dhatwalia

Gautam

2009

CYTOLOGIA

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Summary Cytogenetic study was carried out on willow aphids viz. Cavariella aegopodii and Tuberolachnus salignus in order to ascertain the karyotype and sex determination in these aphids from different localities of Himachal Pradesh, India. In Cavariella aegopodii, collected from Shimla, Mashobra and Shoghi localities, 2n is 10. There is 1 pair of long, 2 pairs of medium sized and 2 pairs of short chromosomes. However, karyotypic variation was observed in aphid populations collected from the Solan locality, where the variable diploid chromosome numbers such as 2nϭ8, 9 and 10 were also recorded. The male sexuals of Cavariella aegopodii are diploid having 2nϭ9 with 4 pairs of autosomes and a single X chromosome. The various stages of meiosis in the testes of the male mainly occur during the early developmental stages and can also be found in the first and second instar nymphs. The Cavariella aegopodii has XX-XO type of sex determination system.In Tuberolachnus salignus collected from the Shimla, Mashobra and Shoghi localities, 2n is 20. The idiogram of Tuberolachnus salignus reveals the gradual decrease in chromosome length. However, karyotypic variation was observed in aphids collected from the Solan locality where the diploid chromosome number (2n) ranged from 18 to 20.

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Chromosomes of Aphid Fauna from North-western Himalayas, India.

Cited by 7 publications

References 9 publications

Karyotypic Studies on Aphids from Himachal Pradesh (North-western Himalayas), India.

Karyotypic Studies on Aphids from Himachal Pradesh (North-western Himalayas), India.

Karyotype studies on some commonly occurring aphid species

Cytogenetic Studies on Willow Aphids

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