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Titolo:
Evidence for a new sibling species of Anopheles minimus from the Ryukyu Archipelago, Japan
Autore:
Somboon, P; Walton, C; Sharpe, RG; Higa, Y; Tuno, N; Tsuda, Y; Takagi, M;
Indirizzi:
Chiang Mai Univ, Fac Med, Dept Parasitol, Chiang Mai 50200, Thailand Chiang Mai Univ Chiang Mai Thailand 50200 ol, Chiang Mai 50200, Thailand Univ Leeds, Sch Biol, Ecol & Evolut Grp, Leeds LS2 9JT, W Yorkshire, England Univ Leeds Leeds W Yorkshire England LS2 9JT S2 9JT, W Yorkshire, England Nagasaki Univ, Inst Trop Med, Dept Med Entomol, Nagasaki 8528523, Japan Nagasaki Univ Nagasaki Japan 8528523 ed Entomol, Nagasaki 8528523, Japan
Titolo Testata:
JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION
fascicolo: 2, volume: 17, anno: 2001,
pagine: 98 - 113
SICI:
8756-971X(200106)17:2<98:EFANSS>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUBGENUS CELLIA DIPTERA; METAPHASE KARYOTYPES; SOUTHEAST-ASIA; WING LENGTH; BODY-WEIGHT; CULICIDAE; THAILAND; COMPLEX; IDENTIFICATION; SERIES;
Keywords:
Anopheles minimus; Japan; Thailand; morphology; DNA; hybridization; species complex;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Somboon, P Chiang Mai Univ, Fac Med, Dept Parasitol, Chiang Mai 50200, Thailand Chiang Mai Univ Chiang Mai Thailand 50200 Mai 50200, Thailand
Citazione:
P. Somboon et al., "Evidence for a new sibling species of Anopheles minimus from the Ryukyu Archipelago, Japan", J AM MOSQ C, 17(2), 2001, pp. 98-113

Abstract

The Anopheles minimus complex is known to comprise at least 2 sibling species (A and C) in Thailand and Vietnam. This study investigated the specificstatus of An. minimus on Ishigaki Island, the Ryukyu Archipelago. Japan using morphological and genetic analyses. Morphological studies revealed thatalmost all (99.5%) of the adult mosquitoes are characterized by the humeral pale spot on the costa of their wings, a character that partially differentiates species A and C elsewhere. A high frequency (81.4%) have a pale fringe spot at the tip of vein 1A, a character rarely observed in other An. minimus populations. Significant seasonal variation in the size Of Wild An. minimus mosquitoes on the island was observed, with the largest size in the winter. Scanning micrographs of the cibarial armature of females from Ishigaki Island revealed that over 90% had cone filaments clearly differing in shape from those of species A or C. The Giemsa-stained metaphase karyotypes of larval brain cells were somewhat similar to those of species A, with a few exceptions, but were very different from those reported for species C. Crossing experiments between species A (CM strain) from Thailand and the progeny of An. minimus from Ishigaki Island (ISG strain) revealed postzygotic genetic incompatibility, although no prezygotic isolation. Hybrid progeny were only obtained from CM female x ISG male. F-2 hybrid progeny were not obtained, since the hybrid males were sterile or almost sterile with atrophied testes or abnormal spermatozoa. although the polytene chromosomes of hybrid larvae showed synapsis. The hybrid females backcrossed with either CM orISG males laid eggs with significantly lowered fertility and viability. The sequence for the D3 region of the 28S gene of ribosomal DNA of the ISG strain differed from those of species A and C. In addition, sequence data from Vietnamese mosquitoes suggest that the An. minimus complex may contain additional species. The morphological, cytogenetic. molecular, and hybridization evidence together suggest the existence of another sibling species of the An. minimus complex on Ishigaki Island. which is provisionally designated An. minimus species E.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 11:42:36