Abstract:
:We introduce an approach to revealing the likelihood of different population histories that utilizes an explicit model of sequence evolution for the DNA segment under study. Based on a phylogenetic tree reconstruction method we show that a Tamura-Nei model with heterogeneous mutation rates is a fair description of the evolutionary process of the hypervariable region I of the mitochondrial DNA from humans. Assuming this complex model still allows the estimation of population history parameters, we suggest a likelihood approach to conducting statistical inference within a class of expansion models. More precisely, the likelihood of the data is based on the mean pairwise differences between DNA sequences and the number of variable sites in a sample. The use of likelihood ratios enables comparison of different hypotheses about population history, such as constant population size during the past or an increase or decrease of population size starting at some point back in time. This method was applied to show that the population of the Basques has expanded, whereas that of the Biaka pygmies is most likely decreasing. The Nuu-Chah-Nulth data are consistent with a model of constant population.
journal_name
Geneticsjournal_title
Geneticsauthors
Weiss G,von Haeseler Asubject
Has Abstractpub_date
1998-07-01 00:00:00pages
1539-46issue
3eissn
0016-6731issn
1943-2631journal_volume
149pub_type
杂志文章相关文献
GENETICS文献大全abstract::Evolutionary models appropriate for analyzing nucleotide sequences that are subject to constraints on secondary structure are developed. The models consider the evolution of pairs of nucleotides, and they incorporate the effects of base-pairing constraints on nucleotide substitution rates by introducing a new paramete...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1995-03-01 00:00:00
abstract::Drosophila adult leg development provides an ideal model system for characterizing the molecular mechanisms of hormone-triggered morphogenesis. A pulse of the steroid hormone ecdysone at the onset of metamorphosis triggers the rapid transformation of a flat leg imaginal disc into an immature adult leg, largely through...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:2003-11-01 00:00:00
abstract::An AluI family of highly reiterated nontranscribed sequences has been found in the genome of the honeybee Apis mellifera. This repeated sequence is shown to be present at approximately 23,000 copies per haploid genome constituting about 2% of the total genomic DNA. The nucleotide sequence of 10 monomers was determined...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1993-08-01 00:00:00
abstract::In the yeast Saccharomyces cerevisiae ectopic recombination has been shown to occur at high frequencies for artificially created repeats, but at relatively low frequencies for a natural family of repeated sequences, the Ty family. Little is known about the mechanism(s) that prevent recombination between repeated seque...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1996-11-01 00:00:00
abstract::A method for estimating the average level of gene flow among populations is introduced. The method provides an estimate of Nm, where N is the size of each local population in an island model and m is the migration rate. This method depends on knowing the phylogeny of the nonrecombining segments of DNA that are sampled...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1989-11-01 00:00:00
abstract::Populations of several co-existing species of Simocephalus were examined electrophoretically at 11 enzyme loci. The prevailing pattern was one of extensive allelic substitution between species and low levels of polymorphism (0-10%) within species. Genetic identity values between species were very low (10-50%). These r...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1982-09-01 00:00:00
abstract::We show how to incorporate fluctuations of the recombination rate along the chromosome into standard gene-genealogical models for the decorrelation of gene histories. This enables us to determine how small-scale fluctuations (Poissonian hot-spot model) and large-scale variations (Kong et al. 2002) of the recombination...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.103.018002
更新日期:2005-02-01 00:00:00
abstract::The genetic basis of stochastic variation within a defined environment, and the consequences of such micro-environmental variance for fitness are poorly understood . Using a multigenerational breeding design in Drosophila serrata, we demonstrated that the micro-environmental variance in a set of morphological wing tra...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.116.199075
更新日期:2017-08-01 00:00:00
abstract::The correct wiring of neuronal circuits depends on outgrowth and guidance of neuronal processes during development. In the past two decades, great progress has been made in understanding the molecular basis of axon outgrowth and guidance. Genetic analysis in Caenorhabditis elegans has played a key role in elucidating ...
journal_title:Genetics
pub_type: 杂志文章,评审
doi:10.1534/genetics.115.186262
更新日期:2016-11-01 00:00:00
abstract::Inactivation of the maternal or paternal X chromosome in a mammalian embryonic XX cell is believed to involve random choice between the two X's. We propose two alternative models. One suggests that choice is not random, while the other is consistent with random choice, but not one between two X's. ...
journal_title:Genetics
pub_type: 评论,杂志文章
doi:10.1534/genetics.104.029819
更新日期:2004-07-01 00:00:00
abstract::Maize (Zea mays L.) serves as model plant for heterosis research and is the crop where hybrid breeding was pioneered. We analyzed genomic and phenotypic data of 1254 hybrids of a typical maize hybrid breeding program based on the important Dent × Flint heterotic pattern. Our main objectives were to investigate genome ...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.114.165860
更新日期:2014-08-01 00:00:00
abstract::The Saccharomyces cerevisiae GAL/MEL regulon genes are normally induced within minutes of galactose addition, but gal3 mutants exhibit a 3-5-day induction lag. We have discovered that this long-term adaptation (LTA) phenotype conferred by gal3 is complemented by multiple copies of the GAL1 gene. Based on this result a...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1990-06-01 00:00:00
abstract::Predicting the chromosomal location of mapped markers has been difficult because linkage maps do not reveal differences in crossover frequencies along the physical structure of chromosomes. Here we combine a physical crossover map based on the distribution of recombination nodules (RNs) on Solanum lycopersicum (tomato...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.107.074138
更新日期:2007-08-01 00:00:00
abstract::We constructed a genetic linkage map of Gibberella zeae (Fusarium graminearum) by crossing complementary nitrate-nonutilizing (nit) mutants of G. zeae strains R-5470 (from Japan) and Z-3639 (from Kansas). We selected 99 nitrate-utilizing (recombinant) progeny and analyzed them for amplified fragment length polymorphis...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:2002-04-01 00:00:00
abstract::Several eukaryotic homologs of the Escherichia coli RecQ DNA helicase have been found. These include the human BLM gene, whose mutation results in Bloom syndrome, and the human WRN gene, whose mutation leads to Werner syndrome resembling premature aging. We cloned a Drosophila melanogaster homolog of the RECQ helicase...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1999-03-01 00:00:00
abstract::We previously isolated a pollen factor, ui6.1, which encodes a Cullin1 protein (CUL1) that functions in unilateral interspecific incompatibility (UI) in Solanum. Here we show that CUL1 is also required for pollen function in self-incompatibility (SI). We used RNA interference (RNAi) to reduce CUL1 expression in pollen...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.113.158279
更新日期:2014-02-01 00:00:00
abstract::High-density genotyping of single-nucleotide polymorphisms (SNPs) enables detection of quantitative trait loci (QTL) by linkage disequilibrium (LD) mapping using LD between markers and QTL and the subsequent use of this information for marker-assisted selection (MAS). The success of LD mapping and MAS depends on the e...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.107.082206
更新日期:2007-12-01 00:00:00
abstract::The Sex-Ratio (SR) phenomenon is associated with the X chromosome of many species of Drosophila. Males carrying SR transmit predominantly sperm bearing the X chromosome. SR, therefore, has a very significant advantage in segregation. This paper provides an experimental analysis of the role of virility selection in pre...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1983-11-01 00:00:00
abstract::The level of activity of the enzyme glucose-6-phosphate dehydrogenase was determinel in flies having seven different chromosomic constitutions. All those having an integral number of chromosomes [XAA, XXAA, XAAA, XXAAA, and XXXAAA (X=Xchromosome, A=set of autosomes)] were found to have similar units of enzyme activity...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1973-06-01 00:00:00
abstract::In random mating autopolyploid populations which have not reached equilibrium, two alleles may be interdependent as a result of the phenomenon of gametic recombination, i.e. the maintenance through successive gamete generations of an association of two alleles from the same gamete in a source reference generation. Any...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1974-03-01 00:00:00
abstract::Bacteriophages are the most abundant biological entities in our biosphere, characterized by their hyperplasticity, mosaic composition, and the many unknown functions (ORFans) encoded by their immense genetic repertoire. These genes are potentially maintained by the bacteriophage to allow efficient propagation on hosts...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.111.135640
更新日期:2012-03-01 00:00:00
abstract::We have identified two Saccharomyces cerevisiae genes that, in high copy, confer resistance to Kluyveromyces lactis zymocin, an inhibitor that blocks cells in the G(1) phase of the cell cycle prior to budding and DNA replication. One gene (GRX3) encodes a glutaredoxin and is likely to act at the level of zymocin entry...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:2001-12-01 00:00:00
abstract::A leucine, leucyl-tRNA synthetase-dependent pathway activates TorC1 kinase and its downstream stimulation of protein synthesis, a major nitrogen consumer. We previously demonstrated, however, that control of Gln3, a transcription activator of catabolic genes whose products generate the nitrogenous precursors for prote...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.114.173831
更新日期:2015-02-01 00:00:00
abstract::Cell-cell fusion is essential for a variety of developmental steps in many eukaryotic organisms, during both fertilization and vegetative cell growth. Although the molecular mechanisms associated with intracellular membrane fusion are well characterized, the molecular mechanisms of plasma membrane merger between cells...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.108.096149
更新日期:2009-02-01 00:00:00
abstract::Several quantitative trait loci (QTL) mapping strategies can successfully identify major-effect loci, but often have poor success detecting loci with minor effects, potentially due to the confounding effects of major loci, epistasis, and limited sample sizes. To overcome such difficulties, we used a targeted backcross...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.108.092932
更新日期:2008-11-01 00:00:00
abstract::Log-linear analysis of contingency tables is applied to trihybrid backcross data to estimate linkage and viability. Whereas nonadditive viability differences perturb recombination estimates in the classical analysis, this statistical procedure yields maximum likelihood crossover frequency estimates in the presence of ...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1981-09-01 00:00:00
abstract::The distribution of four X-linked mutants (G6PD, Deutan, Protan and Xg) among lowland and once highly malarial populations of Sardinia discloses a clear-cut example of linkage disequiligrium between two of them (G6PD and Protan). In the same populations the distribution of G6PD-deficiency versus colorblindness of the ...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1977-05-01 00:00:00
abstract::A procedure permitting deletion scanning of potential cis-regulatory sequences within a transgene whose genomic position remains fixed was applied to the study of the upstream sequences of the ecdysteroid-inducible Fat-body-protein-1 (Fbp1) gene. Deficiencies were induced in a Fbp1:Adh fusion transgene by means of a s...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1993-11-01 00:00:00
abstract::The unicellular green alga Chlamydomonas reinhardtii is used extensively as a model to study eukaryotic photosynthesis, flagellar functions, and more recently the production of hydrogen as biofuel. Two of these processes, photosynthesis and hydrogen production, are highly dependent on iron-sulfur (Fe-S) enzymes. To un...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.107.086033
更新日期:2008-05-01 00:00:00
abstract::A continuing study of mortality rates among children born to survivors of the atomic bombings and a suitable group of controls has been updated; the average interval between birth and verification of death or survival is 17 years. The mortality experience is now based on 18,946 children liveborn to parents one or both...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1974-02-01 00:00:00