Abstract：
:Isolation allows populations to diverge and to fix different alleles. Deleterious alleles that reach locally high frequencies contribute to genetic load, especially in inbred or selfing populations, in which selection is relaxed. In the event of secondary contact, the recessive portion of the genetic load is masked in the hybrid offspring, producing heterosis. This advantage, only attainable through outcrossing, should favour evolution of greater outcrossing even if inbreeding depression has been purged from the contributing populations. Why, then, are selfing-to-outcrossing transitions not more common? To evaluate the evolutionary response of mating system to heterosis, we model two monomorphic populations of entirely selfing individuals, introduce a modifier allele that increases the rate of outcrossing and investigate whether the heterosis among populations is sufficient for the modifier to invade and fix. We find that the outcrossing mutation invades for many parameter choices, but it rarely fixes unless populations harbour extremely large unique fixed genetic loads. Reversions to outcrossing become more likely as the load becomes more polygenic, or when the modifier appears on a rare background, such as by dispersal of an outcrossing genotype into a selfing population. More often, the outcrossing mutation instead rises to moderate frequency, which allows recombination in hybrids to produce superior haplotypes that can spread without the mutation's further assistance. The transience of heterosis can therefore explain why secondary contact does not commonly yield selfing-to-outcrossing transitions.
journal_name
J Evol Bioljournal_title
Journal of evolutionary biologyauthors
Harkness A,Brandvain Y,Goldberg EEdoi
10.1111/jeb.13430subject
Has Abstractpub_date
2019-05-01 00:00:00pages
476-490issue
5eissn
1010-061Xissn
1420-9101journal_volume
32pub_type
杂志文章abstract：:Why sexual reproduction has evolved to be such a widespread mode of reproduction remains a major question in evolutionary biology. Although previous studies have shown that increased sex and recombination can evolve in the presence of host-parasite interactions (the 'Red Queen hypothesis' for sex), many of these studi...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2012.02468.x
更新日期：2012-04-01 00:00:00
abstract：:The number of mature eggs remaining in the ovaries and the time left for oviposition determine the reproductive decisions of the hyperdiverse guild of insects that require discrete and potentially limiting resources for oviposition (such as seeds, fruits or other insects). A female may run out of eggs before all avail...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.12363
更新日期：2014-05-01 00:00:00
abstract：:Whole-comparative genomic hybridization (W-CGH) has been used to exemplify a simple methodology which allows identifying and mapping whole genome differences for highly repetitive DNA sequences between two related species of unknown genomic background. The use of this technique to the species binomy Arcyptera fusca/Ar...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2007.01436.x
更新日期：2008-01-01 00:00:00
abstract：:Evolutionary theories of ageing predict that life span increases with decreasing extrinsic mortality, and life span variation among queens in ant species seems to corroborate this prediction: queens, which are the only reproductive in a colony, live much longer than queens in multi-queen colonies. The latter often inh...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2011.02278.x
更新日期：2011-07-01 00:00:00
abstract：:Sexual signalling is predicted to shape the evolution of sex-specific ornamentation, and establishing the costs and benefits of ornamentation and the information that ornamentation provides to receivers is necessary to evaluating this adaptive function. Here, we assessed the adaptive function of a common colour orname...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.12953
更新日期：2016-11-01 00:00:00
abstract：:The utility of traits involved in resource exploitation is a central criterion for the adaptive character of radiations. Here, we test for differentiation in morphology, jaw mechanics and nutrition among species and sexes of Lake Matano's sympatric 'roundfin' sailfin silversides. The three incipient fish species diffe...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2011.02357.x
更新日期：2011-11-01 00:00:00
abstract：:The evolutionary significance of widespread hypo-allometric scaling of genital traits in combination with rapid interspecific genital trait divergence has been of key interest to evolutionary biologists for many years and remains poorly understood. Here, we provide a detailed assessment of quantitative genital trait v...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.12848
更新日期：2016-06-01 00:00:00
abstract：:When two species come into contact and interbreed, the production of unfit hybrids can limit or prevent gene flow between the populations, thus maintaining each species' separate identity. The genetic basis of this hybrid dysfunction has recently begun to be elucidated, particularly for hybrid sterility and inviabilit...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.12262
更新日期：2014-01-01 00:00:00
abstract：:A challenge of life-history theory is to explain why animal body size does not continue to increase, given various advantages of larger size. In birds, body size of nestlings and the number of nestlings produced (brood size) have occasionally been shown to be constrained by higher predation on larger nestlings and tho...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.13218
更新日期：2018-02-01 00:00:00
abstract：:The evolutionary forces shaping within- and across-species variation in the investment in male and female sex function are still incompletely understood. Despite earlier suggestions that in plants the evolution or cosexuality vs. dioecy, as well as sex allocation among cosexuals, is affected by seed and pollen dispers...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2010.02057.x
更新日期：2010-09-01 00:00:00
abstract：:When the availability of sperm limits female reproductive success, competition for sperm, may be an important broker of sexual selection. This is because sperm limitation can increase the variance in female reproductive success, resulting in strong selection on females to compete for limited fertilization opportunitie...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2005.00947.x
更新日期：2005-09-01 00:00:00
abstract：:Polyandry is widespread despite its costs. The sexually selected sperm hypotheses ('sexy' and 'good' sperm) posit that sperm competition plays a role in the evolution of polyandry. Two poorly studied assumptions of these hypotheses are the presence of additive genetic variance in polyandry and sperm competitiveness. U...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.12834
更新日期：2016-05-01 00:00:00
abstract：:Many palaeontological studies have investigated the evolution of entire body plans, generally relying on discrete character-taxon matrices. In contrast, macroevolutionary studies performed by neontologists have mostly focused on morphometric traits. Although these data types are very different, some studies have sugge...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.13050
更新日期：2017-04-01 00:00:00
abstract：:Temporal resource fluctuations could affect the strength of antagonistic coevolution through population dynamics and costs of adaptation. We studied this by coevolving the prey bacterium Serratia marcescens with the predatory protozoa Tetrahymena thermophila in constant and pulsed-resource environments for approximate...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2011.02379.x
更新日期：2011-12-01 00:00:00
abstract：:Although adaptive divergence along environmental gradients has repeatedly been demonstrated, the role of post-glacial colonization routes in determining phenotypic variation along gradients has received little attention. Here, we used a hierarchical QST -FST approach to separate the roles of adaptive and neutral proce...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.13419
更新日期：2019-04-01 00:00:00
abstract：:In a recent article, Nowak et al. claim that the mathematical basis of inclusive fitness theory does not stand to scrunity and to have found an alternative explanation for eusociality. We show that these claims are based on false premises, many of which have been exposed more than 25 years ago, such as misrepresentati...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2011.02251.x
更新日期：2011-06-01 00:00:00
abstract：:We investigated genetic variability and genetic correlations in early life-history traits of Crassostrea gigas. Larval survival, larval development rate, size at settlement and metamorphosis success were found to be substantially heritable, whereas larval growth rate and juvenile traits were not. We identified a stron...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1046/j.1420-9101.2003.00543.x
更新日期：2003-05-01 00:00:00
abstract：:Maternal inheritance of mitochondrial DNA (mtDNA) was originally thought to prevent any response to selection on male phenotypic variation attributable to mtDNA, resulting in a male-biased mtDNA mutation load ("mother's curse"). However, the theory underpinning this claim implicitly assumes that a male's mtDNA has no ...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.13561
更新日期：2020-02-01 00:00:00
abstract：:Reproduction entails costs, and disentangling the relative importance of each stage of the reproductive cycle may be important to assess the costs and benefits of different reproductive strategies. We studied the early costs of reproduction in oviparous and viviparous lizard females of the bimodal reproductive species...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2012.02518.x
更新日期：2012-07-01 00:00:00
abstract：:In Drosophila melanogaster, mating radically transforms female physiology and behaviour. Post-mating responses include an increase in the oviposition rate, a reduction in female receptivity and an activation of the immune system. The fitness consequences of mating are similarly dramatic--females must mate once in orde...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2009.01708.x
更新日期：2009-05-01 00:00:00
abstract：:Our ability to examine genetic variation across entire genomes has enabled many studies searching for the genetic basis of local adaptation. These studies have identified numerous loci as candidates for differential local selection; however, relatively few have examined the overlap among candidate loci identified from...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.13732
更新日期：2020-11-04 00:00:00
abstract：:Phenotypic polymorphisms in natural systems are often maintained by ecological selection, but only if niche segregation between morphs exists. Polymorphism for eyed-side direction is rare among the approximately 700 species of flatfish (Pleuronectiformes), and the evolutionary mechanisms that maintain it are unknown. ...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2006.01290.x
更新日期：2007-05-01 00:00:00
abstract：:The Red Queen hypothesis predicts that sex should be more common in populations heavily infested with parasites, than in those without. This hypothesis was investigated in the aquatic snail Melanoides tuberculata, in which both sexual and parthenogenetic individuals exist in natural populations, and some populations a...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2004.00791.x
更新日期：2005-01-01 00:00:00
abstract：:Although heritability estimates for traits potentially under natural selection are increasingly being reported, their estimation remains a challenge if we are to understand the patterns of adaptive phenotypic change in nature. Given the potentially important role of selection on the early life phenotype, and thereby o...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2010.01941.x
更新日期：2010-04-01 00:00:00
abstract：:Many species of the sexually deceptive genus Ophrys are characterized by insect-like flowers. Their form has been traditionally considered to play an important role in pollinator attraction and manipulation. Yet, the evolution of the floral form remains insufficiently understood. We hypothesize that pollinator-mediate...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.13153
更新日期：2017-11-01 00:00:00
abstract：:We compared historic and contemporary genetic variation in two threatened New Zealand birds (saddlebacks and robins) with disparate bottleneck histories. Saddlebacks showed massive loss of genetic variation when extirpated from the mainland, but no significant loss of variation following a severe bottleneck in the 196...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/j.1420-9101.2007.01362.x
更新日期：2007-09-01 00:00:00
abstract：:For 8 years I have been pursuing in print an ambitious and at times highly technical programme of work, the 'Formal Darwinism Project', whose essence is to underpin and formalize the fitness optimization ideas used by behavioural ecologists, using a new kind of argument linking the mathematics of motion and the mathem...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章,评审
doi：10.1111/j.1420-9101.2007.01321.x
更新日期：2007-07-01 00:00:00
abstract：:Current avian migration patterns in temperate regions have been developed during the glacial retreat and subsequent colonization of the ice-free areas during the Holocene. This process resulted in a geographic gradient of greater seasonality as latitude increased that favoured migration-related morphological and physi...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.13630
更新日期：2020-07-01 00:00:00
abstract：:Although numerous studies have attempted to find single unifying mechanisms for generating Madagascar's unique flora and fauna, little consensus has been reached regarding the relative importance of climatic, geologic and ecological processes as catalysts of diversification of the region's unique biota. Rather, recent...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章
doi：10.1111/jeb.12586
更新日期：2015-02-01 00:00:00
abstract：:Character displacement - the divergence of traits between species in response to competition for resources or mates - has long been viewed as a major cause of adaptive diversification and species coexistence. Yet, we lack answers to basic questions concerning the causes and consequences of character displacement, not ...
journal_title：Journal of evolutionary biology
pub_type： 杂志文章,评审
doi：10.1111/j.1420-9101.2006.01187.x
更新日期：2007-03-01 00:00:00
