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Titolo:
Female remating in butterflies: interaction between female genotype and nonfertile sperm
Autore:
Wedell, N;
Indirizzi:
Univ Stockholm, Dept Zool, S-10691 Stockholm, Sweden Univ Stockholm Stockholm Sweden S-10691 Zool, S-10691 Stockholm, Sweden
Titolo Testata:
JOURNAL OF EVOLUTIONARY BIOLOGY
fascicolo: 5, volume: 14, anno: 2001,
pagine: 746 - 754
SICI:
1010-061X(200109)14:5<746:FRIBIB>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACCESSORY-GLAND PRODUCTS; DROSOPHILA-MELANOGASTER; PIERIS-NAPI; REPRODUCTIVE SUCCESS; SEXUAL SELECTION; GENETIC-BASIS; BODY-SIZE; LEPIDOPTERA; COMPETITION; EVOLUTION;
Keywords:
apyrene sperm; Lepidoptera; nuptial gifts; polyandry; refractory period; sexual conflict; sperm competition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
68
Recensione:
Indirizzi per estratti:
Indirizzo: Wedell, N Univ Leeds, Sch Biol, Ecol & Evolut Grp, Leeds LS2 9JT, W Yorkshire, England Univ Leeds Leeds W Yorkshire England LS2 9JT Yorkshire, England
Citazione:
N. Wedell, "Female remating in butterflies: interaction between female genotype and nonfertile sperm", J EVOL BIOL, 14(5), 2001, pp. 746-754

Abstract

Female mating rate is fundamental to evolutionary biology as it determinesthe pattern of sexual selection and sexual conflict. Despite its importance, the genetic basis for female remating rate is largely unknown and has only been demonstrated in one species. In paternally investing species there is often a conflict between the sexes over female mating rate, as females remate to obtain male nutrient donations and males try to prevent female remating to ensure high fertilization success. Butterflies produce two types of sperm: fertilizing, eupyrene sperm, and large numbers of nonfertile, apyrene sperm. The function of apyrene sperm in the polyandrous, paternally investing green-veined white butterfly, Pieris napi, is to fill the female's sperm storage organ thereby reducing her receptivity. However, there is large variation in number of apyrene sperm stored. Here, I examine the genetic basis to this variation, and if variation in number of apyrene sperm storedis related to females' remating rate. The number of apyrene sperm stored at the time of remating has a genetic component and is correlated with female remating tendency, whereas no such relationship is found for fertilizing sperm. The duration of the nonreceptivity period in P. napi also has a genetic component and is inversely related to the degree of polyandry. Sexual conflict over female remating rate appears to be present in this species, with males using their apyrene sperm to exploit a female system designed to monitor sperm in storage. Ejaculates with a high proportion of nonfertile sperm may have evolved to induce females to store more of these sperm, thereby reducing remating. As a counter-adaptation, females have evolved a betterdetection system to regain control over their remating rate. Sexually antagonistic co-evolution of apyrene sperm number and female sperm storage may be responsible for ejaculates with predominantly nonfertile sperm in this butterfly.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 01:10:06