Intragenic Suppression at the b2 Locus in ASCOBOLUS IMMERSUS. II. Characteristics of the Mutations in Groups A and E.

abstract：:The ade6-M26 mutation of Schizosaccharomyces pombe has previously been reported to stimulate ade6 intragenic meiotic recombination. We report here that the ade6-M26 mutation is a single G----T nucleotide change, that M26 stimulated recombination within ade6 but not at other distinct loci, and that M26 stimulated meiot...

journal_title：Genetics

authors： Ponticelli AS,Sena EP,Smith GR

更新日期：1988-07-01 00:00:00

abstract：:New rudimentary (r) mutants have been isolated following mutagenesis with ethyl methanesulfonate (r(LE)), ICR-170 (r(LI)) and X rays (r(LX)). From wing phenotype measurements on homoallelic females, it has been shown that the r(LE) mutant series includes several leaky alleles, as well as alleles that produce moderate ...

journal_title：Genetics

authors： Rawls JM,Porter LA

更新日期：1979-09-01 00:00:00

abstract：:Genetic study of the reproductive barriers between related species plays an essential role in understanding the process of speciation. We developed a new method for mapping all possible factors causing deviations from expected Mendelian segregation ratios in F(2) progeny, which substantially contribute to reproductive...

journal_title：Genetics

authors： Harushima Y,Nakagahra M,Yano M,Sasaki T,Kurata N

更新日期：2001-10-01 00:00:00

abstract：:The mutational origin and subsequent evolution of de novo genes, which are hypothesized to be genes of recent origin that are not obviously related to ancestral coding sequence, are poorly understood. However, accumulating evidence suggests that such genes may often function in male reproduction. Here we use testis-de...

journal_title：Genetics

authors： Begun DJ,Lindfors HA,Kern AD,Jones CD

更新日期：2007-06-01 00:00:00

abstract：:In(2LR)PL is a large pericentric inversion polymorphic in populations of Drosophila melanogaster on two Indian Ocean islands. This polymorphism is puzzling: because crossing over in female heterokaryotypes produces inviable zygotes, such inversions are thought to be underdominant and should be quickly eliminated from ...

journal_title：Genetics

authors： Coyne JA,Aulard S,Berry A

更新日期：1991-11-01 00:00:00

abstract：:Genetic and developmental analysis of an X-linked vital locus vnd was undertaken. Embryos hemizygous for the original allele vnd did not hatch and exhibited a disorganized ventral nervous system (VNS). The mutation maps in the region 1B6-7 to 1B9-10, a subregion of an area previously shown to be essential to normal ne...

journal_title：Genetics

authors： White K,DeCelles NL,Enlow TC

更新日期：1983-07-01 00:00:00

abstract：:This paper studies the properties of a new class of demographic parameters for age-structured populations and analyzes the effect of natural selection on these parameters. Two new demographic variables are introduced: the entropy of a population and the reproductive potential. The entropy of a population measures the ...

journal_title：Genetics

authors： Demetrius L

更新日期：1975-03-01 00:00:00

abstract：:Likelihood-based parentage inference depends on the distribution of a likelihood-ratio statistic, which, in most cases of interest, cannot be exactly determined, but only approximated by Monte Carlo simulation. We provide importance-sampling algorithms for efficiently approximating very small tail probabilities in the...

journal_title：Genetics

authors： Anderson EC,Garza JC

更新日期：2006-04-01 00:00:00

abstract：:In budding yeast, at least 10 proteins are required for formation of the double-strand breaks (DSBs) that initiate meiotic recombination. Spo11 is the enzyme responsible for cleaving DNA and is found in a complex that also contains Ski8, Rec102, and Rec104. The Mre11/Rad50/Xrs2 complex is required for both DSB formati...

journal_title：Genetics

authors： Li J,Hooker GW,Roeder GS

更新日期：2006-08-01 00:00:00

abstract：:The satellite DNA's from the embryos of five species of Drosophila (D. melanogaster, D. simulans, D. nasuta, D. virilis and D. hydei) have been analyzed for the presence of closed circular duplex DNA molecules, as determined by CsCl-EBr gradients. Circular DNA molecules were found in every species but D. melanogaster....

journal_title：Genetics

authors： Travaglini EC,Schultz J

更新日期：1972-11-01 00:00:00

abstract：:Metazoan genomes encode an abundant collection of mRNA-like, long noncoding (lnc)RNAs. Although lncRNAs greatly expand the transcriptional repertoire, we have a limited understanding of how these RNAs contribute to developmental regulation. Here, we investigate the function of the Drosophila lncRNA called yellow-achae...

journal_title：Genetics

authors： Soshnev AA,Ishimoto H,McAllister BF,Li X,Wehling MD,Kitamoto T,Geyer PK

更新日期：2011-10-01 00:00:00

abstract：:We study a situation that arises in the somatic evolution of cancer. Consider a finite population of replicating cells and a sequence of mutations: type 0 can mutate to type 1, which can mutate to type 2. There is no back mutation. We start with a homogeneous population of type 0. Mutants of type 1 emerge and either b...

journal_title：Genetics

authors： Iwasa Y,Michor F,Nowak MA

更新日期：2004-03-01 00:00:00

abstract：:In Arabidopsis thaliana, significant efforts to determine the extent of genomic variation between phenotypically divergent accessions are under way, but virtually nothing is known about variation at the transcription level. We used microarrays to examine variation in transcript abundance among three inbred lines and t...

journal_title：Genetics

authors： Vuylsteke M,van Eeuwijk F,Van Hummelen P,Kuiper M,Zabeau M

更新日期：2005-11-01 00:00:00

abstract：:In large populations, multiple beneficial mutations may be simultaneously spreading. In asexual populations, these mutations must either arise on the same background or compete against each other. In sexual populations, recombination can bring together beneficial alleles from different backgrounds, but tightly linked ...

journal_title：Genetics

authors： Weissman DB,Hallatschek O

更新日期：2014-04-01 00:00:00

abstract：:Regulatory DNA from the Drosophila gene engrailed causes silencing of a linked reporter gene (mini-white) in transgenic Drosophila. This silencing is strengthened in flies homozygous for the transgene and has been called "pairing-sensitive silencing." The pairing-sensitive silencing activities of a large fragment (2.6...

journal_title：Genetics

authors： Americo J,Whiteley M,Brown JL,Fujioka M,Jaynes JB,Kassis JA

更新日期：2002-04-01 00:00:00

abstract：:Progress in understanding the evolution of variation at the MHC has been slowed by an inability to assess the relative roles of mutation vs. intragenic recombination in contributing to observed polymorphism. Recent theoretical advances now permit a quantitative treatment of the problem, with the result that the amount...

journal_title：Genetics

authors： Richman AD,Herrera LG,Nash D

更新日期：2003-05-01 00:00:00

abstract：:mod(mdg4), also known as E(var)3-93D, is involved in a variety of processes, such as gene silencing in position effect variegation (PEV), the control of gypsy insulator sequences, regulation of homeotic gene expression, and programmed cell death. We have isolated a large number of mod(mdg4) cDNAs, representing 21 diff...

journal_title：Genetics

authors： Büchner K,Roth P,Schotta G,Krauss V,Saumweber H,Reuter G,Dorn R

更新日期：2000-05-01 00:00:00

abstract：:Conditional cdc1(Ts) mutants of S. cerevisiae arrest with a phenotype similar to that exhibited by Mn(2+)-depleted cells. Sequence similarity between Cdc1p and a class of Mn(2+)-dependent phosphoesterases, as well as the observation that conditional cdc1(Ts) growth can be ameliorated by Mn(2+) supplement, suggests tha...

journal_title：Genetics

authors： Eguez L,Chung YS,Kuchibhatla A,Paidhungat M,Garrett S

更新日期：2004-05-01 00:00:00

abstract：:Grain yield is a major goal for the improvement of durum wheat, particularly in drought-prone areas. In this study, the genetic basis of grain yield (GY), heading date (HD), and plant height (PH) was investigated in a durum wheat population of 249 recombinant inbred lines evaluated in 16 environments (10 rainfed and 6...

journal_title：Genetics

authors： Maccaferri M,Sanguineti MC,Corneti S,Ortega JL,Salem MB,Bort J,DeAmbrogio E,del Moral LF,Demontis A,El-Ahmed A,Maalouf F,Machlab H,Martos V,Moragues M,Motawaj J,Nachit M,Nserallah N,Ouabbou H,Royo C,Slama A,Tubero

更新日期：2008-01-01 00:00:00

abstract：:Groucho functions as a general corepressor by modulating chromatin structure and has a widespread role in many developmental processes. Here we show that Groucho may also interact with the basal transcriptional machinery. Mutations in Caenorhabditis elegans groucho interact with mutations in components of the transcri...

journal_title：Genetics

authors： Zhang H,Emmons SW

更新日期：2002-02-01 00:00:00

abstract：:During meiotic prophase, assembly of the synaptonemal complex (SC) brings homologous chromosomes into close apposition along their lengths. The Zip1 protein is a major building block of the SC in Saccharomyces cerevisiae. In the absence of Zip1, SC fails to form, cells arrest or delay in meiotic prophase (depending on...

journal_title：Genetics

authors： Mitra N,Roeder GS

更新日期：2007-06-01 00:00:00

abstract：:The three-dimensional organization of polytene chromosomes within nuclei containing rearranged X chromosomes was examined in male Drosophila melanogaster. Salivary glands of third instar larvae containing either an inverted X chromosome (YSX.YL, In(1)EN/O) or a ring X chromosome (R(1) 2/BSYy+) were fixed, embedded, an...

journal_title：Genetics

authors： Mathog D,Sedat JW

更新日期：1989-02-01 00:00:00

abstract：:We developed stochastic population genetic theory for mitochondrial and chloroplast genes, using an infinite alleles model appropriate for molecular genetic data. We considered the effects of mutation, random drift, and migration in a finite island model on selectively neutral alleles. Recurrence equations were obtain...

journal_title：Genetics

authors： Birky CW Jr,Fuerst P,Maruyama T

更新日期：1989-03-01 00:00:00

abstract：:Birds are characterized by female heterogamety; females carry the Z and W sex chromosomes, while males have two copies of the Z chromosome. We suggest here that full differentiation of the Z and W sex chromosomes of birds did not take place until after the split of major contemporary lineages, in the late Cretaceous. ...

journal_title：Genetics

authors： Ellegren H,Carmichael A

更新日期：2001-05-01 00:00:00

abstract：:We explicitly solve and analyze a series of deterministic continent-island models to delimit the effects of pollen and seed migration on cytonuclear frequencies and disequilibria in random-mating, mixed-mating and self-fertilized populations. Given the critical assumption of maternal cytoplasmic inheritance, five majo...

journal_title：Genetics

authors： Asmussen MA,Schnabel A

更新日期：1991-07-01 00:00:00

abstract：:Antisuppressor mutations in the eEF1A gene of Podospora anserina were previously shown to impair ascospore formation, to drastically increase life span, and to permit the development of the Crippled Growth degenerative process. Here, we show that eEF1A controls ascospore formation through accuracy level maintenance. E...

journal_title：Genetics

authors： Silar P,Lalucque H,Haedens V,Zickler D,Picard M

更新日期：2001-08-01 00:00:00

abstract：:The phenomenon of chromosome, or genomic, imprinting indicates the relevance of parental origin in determining functional differences between alleles, homologous chromosomes, or haploid sets. In mealybug males (Homoptera, Coccoidea), the haploid set of paternal origin undergoes heterochromatization at midcleavage and ...

journal_title：Genetics

authors： Bongiorni S,Cintio O,Prantera G

更新日期：1999-04-01 00:00:00

abstract：:When a polygenic character is exposed to natural selection in which the curve giving fitness as a function of phenotype is a mixture of two Gaussian (normal) curves, the population may respond either by evolving to a specialized phenotype near one of the two optimum phenotypes, or by evolving to a generalized phenotyp...

journal_title：Genetics

authors： Felsenstein J

更新日期：1979-11-01 00:00:00

abstract：:Previous mathematical analyses of mutation-selection balance for metric traits assume that selection acts on the relevant loci only through the character(s) under study. Thus, they implicitly assume that all of the relevant mutation and selection parameters are estimable. A more realistic analysis must recognize that ...

journal_title：Genetics

authors： Turelli M

更新日期：1985-09-01 00:00:00

abstract：:During selection for protein content in mice at the Technical University of Berlin, individuals showing high protein content and a compact exterior were noted. Animals showing this "Compact" phenotype were separated to form a new line. The present investigations were carried out on a Hungarian subpopulation of this li...

journal_title：Genetics

authors： Varga L,Szabó G,Darvasi A,Müller G,Sass M,Soller M

更新日期：1997-10-01 00:00:00