OFFSPRING SEX RATIO UNDER INBREEDING AND OUTBREEDING IN A GYNODIOECIOUS PLANT
نویسندگان
چکیده
منابع مشابه
Inbreeding effects on progeny sex ratio and gender variation in the gynodioecious Silene vulgaris (Caryophyllaceae).
In gynodioecious species, sex expression is generally determined through cytoplasmic male sterility genes interacting with nuclear restorers of the male function. With dominant restorers, there may be an excess of females in the progeny of self-fertilized compared with cross-fertilized hermaphrodites. Moreover, the effect of inbreeding on late stages of the life cycle remains poorly explored. H...
متن کاملInbreeding and Outbreeding
This article was originally published in the Encyclopedia of Biodiversity, second edition, the copy attached is provided by Elsevier for the author’s benefit and for the benefit of the author’s institution, for non-commercial research and educational use. This includes without limitation use in instruction at your institution, distribution to specific colleagues, and providing a copy to your in...
متن کاملFemale ambrosia beetles adjust their offspring sex ratio according to outbreeding opportunities for their sons.
Recent studies on the effect of local mate competition (LMC) on sex ratios have focused on the effect of post-dispersal mating success by males. A higher proportion of males is expected to be produced as the potential for outbreeding increases. Here we demonstrate that males of a haplodiploid ambrosia beetle with LMC disperse to seek additional matings, and brood sex ratios increase with outbre...
متن کاملInbreeding and outbreeding depression in Caenorhabditis nematodes.
The nematode Caenorhabditis elegans reproduces primarily by self-fertilization of hermaphrodites, yet males are present at low frequencies in natural populations (androdioecy). The ancestral state of C. elegans was probably gonochorism (separate males and females), as in its relative C. remanei. Males may be maintained in C. elegans because outcrossed individuals escape inbreeding depression. T...
متن کاملTransposable elements in inbreeding and outbreeding populations.
Y OUNG et al. (1994) recently found that a putative transposable element (Lytl) is present at high abundance in the genomes of individuals sampled from a group of red-fruited species of Lycopersicon, and at a much lower abundance in green-fruited species of this genus. Similar or somewhat lower abundances were found in Solanum species believed to be closely related to Lycopersicon, and even low...
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ژورنال
عنوان ژورنال: Evolution
سال: 2005
ISSN: 0014-3820,1558-5646
DOI: 10.1111/j.0014-3820.2005.tb00989.x