Abstract:
:There is increasing evidence for the process of sympatric speciation, in which reproductive isolation of species occurs without physical isolation. Theoretical models have focused on disruptive natural selection as the crucial pressure for splitting a species. Here we report the theoretical finding that sympatric speciation may be caused by sexual selection even without disruptive natural selection. Specifically, we show that variation in a male secondary sexual character with two conspicuous extremes and the corresponding variance in female mating preference around no preference may jointly evolve into bimodal distributions with increasing modal divergence of the male and female traits, pulling a population apart into two prezygotically isolated populations. This mode of speciation, driven by two runaway processes in different directions, is promoted by an increase in the efficiency of females in discriminating among males or a decrease in the cost of male conspicuousness, indicating that sympatric speciation may occur more readily if barrier-free or predator-free conditions arise. Although even a slight cost of female preference would cancel the runaway process of sexual selection, it would not cancel the divergent runaway processes of sympatric speciation.
journal_name
Naturejournal_title
Natureauthors
Higashi M,Takimoto G,Yamamura Ndoi
10.1038/990087keywords:
subject
Has Abstractpub_date
1999-12-02 00:00:00pages
523-6issue
6761eissn
0028-0836issn
1476-4687journal_volume
402pub_type
杂志文章相关文献
NATURE文献大全abstract::Some observations suggest that very massive stars experience extreme mass-loss episodes shortly before they explode as supernovae, as do several models. Establishing a causal connection between these mass-loss episodes and the final explosion would provide a novel way to study pre-supernova massive-star evolution. Her...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature11877
更新日期:2013-02-07 00:00:00
abstract::It is thought that neutron stars in low-mass binary systems can accrete matter and angular momentum from the companion star and be spun-up to millisecond rotational periods. During the accretion stage, the system is called a low-mass X-ray binary, and bright X-ray emission is observed. When the rate of mass transfer d...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature12470
更新日期:2013-09-26 00:00:00
abstract::The bony skeleton is maintained by local factors that regulate bone-forming osteoblasts and bone-resorbing osteoclasts, in addition to hormonal activity. Osteoprotegerin protects bone by inhibiting osteoclastic bone resorption, but no factor has yet been identified as a local determinant of bone mass that regulates bo...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature11000
更新日期:2012-05-03 00:00:00
abstract::Tuberculosis (TB), caused by infection with Mycobacterium tuberculosis, is a major cause of morbidity and mortality worldwide. Efforts to control it are hampered by difficulties with diagnosis, prevention and treatment. Most people infected with M. tuberculosis remain asymptomatic, termed latent TB, with a 10% lifetim...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature09247
更新日期:2010-08-19 00:00:00
abstract::Macrophages and dendritic cells have key roles in viral infections, providing virus reservoirs that frequently resist antiviral therapies and linking innate virus detection to antiviral adaptive immune responses. Human immunodeficiency virus 1 (HIV-1) fails to transduce dendritic cells and has a reduced ability to tra...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature10195
更新日期:2011-06-29 00:00:00
abstract::Control of protein synthesis is associated with changes in the ratio of intracellular Na+ to K+ in the cultured embryonic chick lens. Correlations of intracellular Na+/K+ ratios with crystallin synthesis and cataract formation in vitro suggest that the Na+/K+ ratio may have an important role in the regulation of prote...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/270406a0
更新日期:1977-12-01 00:00:00
abstract::Lipoxygenase metabolites of arachidonic acid have recently been shown to modulate the activity of ion channels in nerve and muscle cells. The mechanism of action of these metabolites is, however, unknown. In sensory neurons of Aplysia, the S-K- channel is under the dual modulatory control of 5-hydroxytryptamine (5-HT)...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/342553a0
更新日期:1989-11-30 00:00:00
abstract::In bacteria, archaea, fungi and plants the Trk, Ktr and HKT ion transporters are key components of osmotic regulation, pH homeostasis and resistance to drought and high salinity. These ion transporters are functionally diverse: they can function as Na(+) or K(+) channels and possibly as cation/K(+) symporters. They ar...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature12055
更新日期:2013-04-18 00:00:00
abstract::The human B cell-specific alloantigen which is closely linked genetically to HLA contains two non-covalently associated, sialogycoprotein subunits of molecular weight (MW) 29,000 (p29), and 34,000 (p34). Although p29 and p34 have different amino-terminal sequences, their tyrosine peptide maps indicate considerable sim...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/268213a0
更新日期:1977-07-21 00:00:00
abstract::The mutation brachypodism (bp) alters the length and number of bones in the limbs of mice but spares the axial skeleton. It illustrates the importance of specific genes in controlling the morphogenesis of individual skeletal elements in the tetrapod limb. We now report the isolation of three new members of the transfo...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/368639a0
更新日期:1994-04-14 00:00:00
abstract::Muscarinic receptors of cardiac pacemaker and atrial cells are linked to a potassium channel (IK.ACh) by a pertussis toxin-sensitive GTP-binding protein. The dissociation of G-proteins leads to the generation of two potential transducing elements, alpha-GTP and beta gamma. IK.ACh is activated by G-protein alpha- and b...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/337557a0
更新日期:1989-02-09 00:00:00
abstract:: ...
journal_title:Nature
pub_type: 评论,新闻
doi:10.1038/d41586-019-00450-0
更新日期:2019-02-01 00:00:00
abstract::The clinical benefit for patients with diverse types of metastatic cancers that has been observed upon blockade of the interaction between PD-1 and PD-L1 has highlighted the importance of this inhibitory axis in the suppression of tumour-specific T-cell responses. Notwithstanding the key role of PD-L1 expression by ce...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature23669
更新日期:2017-09-07 00:00:00
abstract::Some surprising facts about the most productive institutions emerge when Japanese life-science research is subject to a novel type of assessment. ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/372125a0
更新日期:1994-11-10 00:00:00
abstract::The rat hippocampus receives a strong cholinergic innervation from the medial septum; information about the development and function of this pathway could help to elucidate the mechanisms of memory functions. Previous electrophysiological studies have shown that septal stimulation in vivo facilitates commissural and p...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/313577a0
更新日期:1985-02-14 00:00:00
abstract::After observation of detailed structural evidence for the origin of birds from dinosaurs, and in light of evidence that dinosaur bone tissue resembles the histology in mammals, the histology of bone has become one of the focal points in discussions of the physiology of dinosaurs and Mesozoic birds. Most of this micros...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/35020550
更新日期:2000-08-10 00:00:00
abstract::The vasa gene product of Drosophila melanogaster is required only in the female germ line. Progeny of females homozygous for vasa mutations lack posterior structures and pole cells. Isolation and characterization of vasa genomic and complementary DNA clones show that the transcript is abundant in the female germ line ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/335611a0
更新日期:1988-10-13 00:00:00
abstract::We have used in vitro mutagenesis to identify a DNA sequence that is required for glucose regulation of the ADR2 locus of Saccharomyces cerevisiae. This region, located between 200 and 1,000 base pairs upstream of the structural gene for ADH II, has been identified by genetic and biochemical analysis as the site of AD...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/300724a0
更新日期:1982-12-23 00:00:00
abstract::The classical theory of solids, based on the quantum mechanics of single electrons moving in periodic potentials, provides an excellent description of substances ranging from semiconducting silicon to superconducting aluminium. Over the last fifteen years, it has become increasingly clear that there are substances for...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature01044
更新日期:2002-10-03 00:00:00
abstract::The AP-1 family of transcription factors, which includes the proto-oncogene products c-Jun and c-Fos, controls the stimulation of cellular genes by growth factors and the expression of oncogenes, including src and ras. Transcriptional activation by c-Jun is regulated by a cell-type-specific inhibitor that represses th...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/352165a0
更新日期:1991-07-11 00:00:00
abstract::Despite the introduction of antiproliferative drug-eluting stents, coronary heart disease remains the leading cause of death in the United States. In-stent restenosis and bypass graft failure are characterized by excessive smooth muscle cell (SMC) proliferation and concomitant myointima formation with luminal oblitera...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature13232
更新日期:2014-05-29 00:00:00
abstract::Good health, which reflects the harmonious integration of molecules, cells, tissues and organs, is dynamically stable: when displaced by disease, compensation and correction are common, even without medical care. Physiology and computational biology now suggest that healthy dynamic stability arises through the combina...
journal_title:Nature
pub_type: 杂志文章,评审
doi:10.1038/nature01260
更新日期:2002-11-14 00:00:00
abstract::Most mitochondrial proteins are synthesized on cytoplasmic ribosomes and imported into mitochondria. The imported proteins are directed to one of four submitochondrial compartments--the outer mitochondrial membrane, the inner mitochondrial membrane, the intramembraneous space, or the matrix--where the protein then fun...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/417087a
更新日期:2002-05-02 00:00:00
abstract::Constructing agents with planning capabilities has long been one of the main challenges in the pursuit of artificial intelligence. Tree-based planning methods have enjoyed huge success in challenging domains, such as chess1 and Go2, where a perfect simulator is available. However, in real-world problems, the dynamics ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/s41586-020-03051-4
更新日期:2020-12-01 00:00:00
abstract::During intracellular Ca2+ signalling mitochondria accumulate significant amounts of Ca2+ from the cytosol. Mitochondrial Ca2+ uptake controls the rate of energy production, shapes the amplitude and spatio-temporal patterns of intracellular Ca2+ signals, and is instrumental to cell death. This Ca2+ uptake is undertaken...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature02246
更新日期:2004-01-22 00:00:00
abstract::Sea ice and dust flux increased greatly in the Southern Ocean during the last glacial period. Palaeorecords provide contradictory evidence about marine productivity in this region, but beyond one glacial cycle, data were sparse. Here we present continuous chemical proxy data spanning the last eight glacial cycles (740...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature04614
更新日期:2006-03-23 00:00:00
abstract::The shape of the human erythrocyte depends on intracellular ATP content and echinocytic erythrocyte ghosts obtained in the presence of Mg-ATP acquire a diskocytic shape after incubation at 37 degrees C; however, agreement is lacking about the molecular basis of the shape changes. The suggestion that phosphorylation of...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/307376a0
更新日期:1984-01-26 00:00:00
abstract::The promoter for a weakly expressed constitutive gene, the lactose repressor gene (lacI), has been sequenced, along with an 'up' promoter mutation Iq. The 10-fold enhancement in I expression found in Iq is the result of a single base change at position -35. To facilitate the sequencing, the lacI gene was cloned in a s...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/274762a0
更新日期:1978-08-24 00:00:00
abstract::In Dictyostelium discoideum, carbohydrate binding proteins (CBPs) or lectins have been implicated in the molecular basis of cellular cohesion. To determine the role of these CBPs, we have attempted to isolate structural gene mutants in which the CBPs have a defective affinity for carbohydrate ligands. We now report th...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/279215a0
更新日期:1979-05-17 00:00:00
abstract::Protein modification by the conjugation of ubiquitin moieties--ubiquitination--plays a major part in many biological processes, including cell cycle and apoptosis. The enzymes that mediate ubiquitin-conjugation have been well-studied, but much less is known about the ubiquitin-specific proteases that mediate de-ubiqui...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature01811
更新日期:2003-08-14 00:00:00