Evolutionary Ecology of the Prezygotic Stage-Reference-Cited by-同舟云学术

Evolutionary Ecology of the Prezygotic Stage

Published:2004-02-13 Issue:5660 Volume:303 Page:971-975
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Bernasconi G.¹²³⁴⁵,Ashman T.-L.¹²³⁴⁵,Birkhead T. R.¹²³⁴⁵,Bishop J. D. D.¹²³⁴⁵,Grossniklaus U.¹²³⁴⁵,Kubli E.¹²³⁴⁵,Marshall D. L.¹²³⁴⁵,Schmid B.¹²³⁴⁵,Skogsmyr I.¹²³⁴⁵,Snook R. R.¹²³⁴⁵,Taylor D.¹²³⁴⁵,Till-Bottraud I.¹²³⁴⁵,Ward P. I.¹²³⁴⁵,Zeh D. W.¹²³⁴⁵,Hellriegel B.¹²³⁴⁵

Affiliation:

1. Institute of Environmental Sciences, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.

2. Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA.

3. Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK.

4. School of Biological Sciences, University of Plymouth, PL4 8AA, UK, and Marine Biological Association, Plymouth PL1 2PB, UK.

5. Institute of Plant Biology, University of Zurich, CH-8008 Zurich, Switzerland.

Abstract

The life cycles of sexually reproducing animals and flowering plants begin with male and female gametes and their fusion to form a zygote. Selection at this earliest stage is crucial for offspring quality and raises similar evolutionary issues, yet zoology and botany use dissimilar approaches. There are striking parallels in the role of prezygotic competition for sexual selection on males, cryptic female choice, sexual conflict, and against selfish genetic elements and genetic incompatibility. In both groups, understanding the evolution of sex-specific and reproductive traits will require an appreciation of the effects of prezygotic competition on fitness.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference69 articles.

1. In both clades the haploid generation starts with meiosis in the diploid parent. Animals: Gametes arising through meiosis do not divide further before fertilization. Only primordial germ cells that are set aside early during development undergo meiosis. Angiosperms: Stem cells produce leaves and shoots until they switch to reproduction. Meiosis is followed by mitotic divisions to yield male (pollen grain) and female (embryo sac) gametophytes. These produce the gametes. Both clades: The haploid sperm is transferred (usually directly in animals via pollen in plants) from its diploid male parent to the haploid egg inside the female parent. Functional integration of paternal and maternal genomes in the offspring may continue after the zygote has been formed (e.g. imprinted genes controlling early embryonic growth delayed expression of paternal genes).

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