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Titolo:
A self-fertile species of Steinernema from Indonesia: further evidence of convergent evolution amongst entomopathogenic nematodes?
Autore:
Griffin, CT; Callaghan, KM; Dix, I;
Indirizzi:
Natl Univ Ireland Maynooth, Inst Bioengn & Agroecol, Maynooth, Kildare, Ireland Natl Univ Ireland Maynooth Maynooth Kildare Ireland th, Kildare, Ireland Natl Univ Ireland Maynooth, Dept Biol, Maynooth, Kildare, Ireland Natl Univ Ireland Maynooth Maynooth Kildare Ireland th, Kildare, Ireland
Titolo Testata:
PARASITOLOGY
, volume: 122, anno: 2001,
parte:, 2
pagine: 181 - 186
SICI:
0031-1820(200102)122:<181:ASSOSF>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
HETERORHABDITIS; REPRODUCTION; RHABDITIDA; SEX;
Keywords:
evolution; hermaphrodite; nematode; reproduction; self-fertilization; sex determination;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Griffin, CT Natl Univ Ireland Maynooth, Inst Bioengn & Agroecol, Maynooth,Kildare, Ireland Natl Univ Ireland Maynooth Maynooth Kildare Ireland Ireland
Citazione:
C.T. Griffin et al., "A self-fertile species of Steinernema from Indonesia: further evidence of convergent evolution amongst entomopathogenic nematodes?", PARASITOL, 122, 2001, pp. 181-186

Abstract

More than 20 species of the entomopathogenic nematode Steinernema have been described; to date, all reproduce exclusively by cross-fertilization of male and female individuals. Steinernema sp. strain T87 from Indonesia was found to consist largely of self-fertile hermaphrodites. Progeny rr-ere produced bq morphological females both in insects (Galleria mellonella) and in hanging drops of insect haemol)mph inoculated with a single infective juvenile. Sperm were present in the oviduct of unmated morphological females. Approximately 1% of infective juveniles developed into males, and males were also present in the second generation where they constituted 1-6%, of the population. Under the same conditions the related species Steinernema longicaudum strain CB2B displayed typical steinernematid reproduction: cross-fertilization and a 1:1 sex ratio. It is argued that the development of hermaphroditism in Steinernema sp. T87 represents convergent evolution with Heterorhabditis, the other major genus of entomopathogenic nematode.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 05:36:57