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| EVOLUTION OF SEX-DETERMINING MECHANISMS IN A WILD POPULATION OF ARMADILLIDIUM-VULGARE LATR (CRUSTACEA, ISOPODA) - COMPETITION BETWEEN 2 FEMINIZING PARASITIC SEX FACTORS |
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| Author(s): JUCHAULT P, RIGAUD T, MOCQUARD JP |
| Source: HEREDITY Volume: 69 Pages: 382-390 Part: Part 4 Published: OCT 1992 |
| Times Cited: 33 References: 23 |
| Abstract: Sex determination in A. vulgare may be under the control of two maternally transmitted parasitic sex factors (PSF) that reverse genetic males (ZZ) into functional neo-females. The first PSF is a Wolbachia-like bacterium (F) and the other (f) is probably a sequence of the F bacterial DNA unstably integrated into the host genome. In the Niort population (France), where these two PSF are mixed, the frequency of neo-females harbouring f increased over a period of 23 years, at the expense of neo-females harbouring F. As the maternal transmission to offspring is higher for F than for f, the evolution of the F/f ratio disagrees with theoretical models involving a cytoplasmic factor. We show that an autosomal masculinizing gene (M) allows a high rate of paternal transmission of f, which could explain the spread of this factor in the population. |
| Document Type: Article |
| Language: English |
| Reprint Address: JUCHAULT, P (reprint author), UNIV POITIERS, CNRS, URA 1452, BIOL ANIM LAB, 40 AVE RECTEUR PINEAU, F-86022 POITIERS, FRANCE |
| Publisher: BLACKWELL SCIENCE LTD, OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL |
| Subject Category: Ecology; Evolutionary Biology; Genetics & Heredity |
| IDS Number: JQ492 |
| ISSN: 0018-067X |
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