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Titolo:
Negative environmental factors and biodiversity: the case of the hybridogenetic green frog system from Lake Trasimeno
Autore:
Bucci, S; Ragghianti, M; Guerrini, F; Cerrini, V; Mancino, G; Morosi, A; Mossone, M; Pascolini, R;
Indirizzi:
Univ Pisa, Dipartimento Fisiol & Biochim, Lab Biol Cellulare & Sviluppo, I-56010 Pisa, Italy Univ Pisa Pisa Italy I-56010 l Cellulare & Sviluppo, I-56010 Pisa, Italy
Titolo Testata:
ITALIAN JOURNAL OF ZOOLOGY
fascicolo: 4, volume: 67, anno: 2000,
pagine: 365 - 370
SICI:
1125-0003(2000)67:4<365:NEFABT>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
RANA-ESCULENTA COMPLEX; TADPOLES; COMPETITION; POPULATIONS; DNA;
Keywords:
hybridogenesis; Rana esculenta complex; satellite DNA; ecological factors; Lake Trasimeno;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Bucci, S Univ Pisa, Dipartimento Fisiol & Biochim, Lab Biol Cellulare & Sviluppo, Via Carducci 13, I-56010 Pisa, Italy Univ Pisa Via Carducci 13 Pisa Italy I-56010 I-56010 Pisa, Italy
Citazione:
S. Bucci et al., "Negative environmental factors and biodiversity: the case of the hybridogenetic green frog system from Lake Trasimeno", ITAL J ZOOL, 67(4), 2000, pp. 365-370

Abstract

South of the Po Valley in Italy, green frogs constitute a hybridogenetic system, represented by one parental species (Rana lessonae) and a hybrid form (A. esculenta). Lacking one parent (R. ridibunda), the hybrid is a reproductive parasite on the coexisting parent: progeny from matings between hybrids are inviable; the hybrid reproduces hybridogenetically by first eliminating the R. lessonae genome from the germ-line cells prior to meiosis, reduplicating the R. ridibunda sec, and then transmitting the R. ridibunda genome hemiclonally to gametes. Hybridity is restored in each generation, sinceR. esculenta gametes are fertilised by gametes from R. lessonae. In order to ascertain whether there are any differences in susceptibility to environmental disturbances between the parental species and the hybrid form, the green frogs living in Lake Trasimeno (central Italy) were analysed. In the absence of reliable morphological systematic characteristics, hybrids and nonhybrids were distinguished by means of a species-specific centromeric satellite DNA, and the percentages of R. lessonae and R. esculenta specimens ateach sampling station were calculated. The results indicate that the parental host is more susceptible to negative environmental factors, which couldthreaten the whole local hybridogenetic system.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 23:36:00