Mating patterns and contemporary gene flow by pollen in a large continuous and a small isolated population of the scattered forest tree Sorbus torminalis.

abstract：:At treeline, selection by harsh environmental conditions sets an upward limit to arboreal vegetation. Increasing temperatures and the decline of traditional animal raising have favoured an upward shift of treeline in the last decades. These circumstances create a unique opportunity to study the balance of the main for...

journal_title：Heredity

authors： Piotti A,Leonardi S,Piovani P,Scalfi M,Menozzi P

更新日期：2009-08-01 00:00:00

abstract：:Segregation distortion is the phenomenon whereby the observed genotypic frequencies of a locus fall outside the expected Mendelian segregation ratio, and it is increasingly recognised as a potentially powerful evolutionary force. The main reason for segregation distortion is a difference in the viability of gametes an...

journal_title：Heredity

authors： Tang ZX,Wang XF,Zhang MZ,Zhang YH,Deng DX,Xu CW

更新日期：2013-04-01 00:00:00

abstract：:Heterozygosity-fitness correlations (HFCs) are often used to link individual genetic variation to differences in fitness. However, most studies examining HFCs find weak or no correlations. Here, we derive broad theoretical predictions about how many loci are needed to adequately measure genomic heterozygosity assuming...

journal_title：Heredity

authors： Miller JM,Malenfant RM,David P,Davis CS,Poissant J,Hogg JT,Festa-Bianchet M,Coltman DW

更新日期：2014-03-01 00:00:00

abstract：:A model involving a specific pairing of homologous double-stranded nucleic acid molecules is applied to some parts of genetic recombination. The most original features of this application of the model relate to the initiation process, a part of which can be described by a highly compact and symmetrical structure. The ...

journal_title：Heredity

authors： McGavin S

更新日期：1977-08-01 00:00:00

abstract：:The genetic differentiation of populations is usually studied by using the equilibrium theory of Wright's infinite island model. In practice, however, populations are not always in equilibrium, and the number of subpopulations is often very small. To get some insight into the dynamics of genetic differentiation of the...

journal_title：Heredity

authors： Varvio SL,Chakraborty R,Nei M

更新日期：1986-10-01 00:00:00

abstract：:Investigations into the genetic basis of reproductive barriers among recognized and putative varieties in Phacelia dubia have provided evidence that even among closely related taxa, multiple pathways can lead to reproductive isolation. A nuclear-based reproductive barrier, expressed as partial hybrid sterility of both...

journal_title：Heredity

authors： Levy F

更新日期：1991-12-01 00:00:00

abstract：:The conditional average frequency of rare alleles has been shown in simulations to provide a simple and robust estimator of the number of individuals exchanged between local populations in an island model (Nm). This statistic is defined as the average frequency of an allele in those samples in which the allele is pres...

journal_title：Heredity

authors： Barton NH,Slatkin M

更新日期：1986-06-01 00:00:00

abstract：:Colour polymorphisms have evolutionary significance for the generation and maintenance of species diversity. Demonstrating heritability of polymorphic traits can be challenging for wild populations of long-lived species because accurate information is required on trait expression and familial relationships. The Austra...

journal_title：Heredity

authors： Dobson AE,Schmidt DJ,Hughes JM

更新日期：2019-09-01 00:00:00

abstract：:We report the first sex-linked loci in Oncorhynchus mykiss (rainbow trout). Previous cytological and breeding experiments have demonstrated an XX/XY sex determining system in this and other salmonid species. Joint segregation data from fathers indicated an average of 8.1 per cent recombination between HEX-2 and the se...

journal_title：Heredity

authors： Allendorf FW,Gellman WA,Thorgaard GH

更新日期：1994-05-01 00:00:00

abstract：:Cultural transmission may depend on the non-genetic transfer of information from parent to offspring. The consequences of such cultural transmission for continuous variation are investigated theoretically for randomly mating populations. Cultural inheritance may act on genetical and environmental differences between i...

journal_title：Heredity

authors： Eaves L

更新日期：1976-08-01 00:00:00

abstract：:Equilibrium sex ratios have been determined analytically under Wright's island model in order to determine the effect of population structure with limited dispersal. When mating occurs before dispersal, the dispersal rate has little or no effect, and the equilibrium sex ratio remains the same as under complete dispers...

journal_title：Heredity

authors： Bulmer MG

更新日期：1986-02-01 00:00:00

abstract：:Haploid nuclear DNA of 23 species of Aedes, as determined by Feulgen cytophotometry, was found to vary 3-fold. This was accompanied by a 2-fold variation in total chromosomal length. There was a significant correlation (r = 0.765, P less than 0.001) between these two parameters. Genome size varied from 0.87 pg to 1.3 ...

journal_title：Heredity

authors： Rao PN,Rai K

更新日期：1987-10-01 00:00:00

abstract：:Populations of the common chimpanzee (Pan troglodytes) are in an impending risk of going extinct in the wild as a consequence of damaging anthropogenic impact on their natural habitat and illegal pet and bushmeat trade. Conservation management programmes for the chimpanzee have been established outside their natural r...

journal_title：Heredity

authors： Frandsen P,Fontsere C,Nielsen SV,Hanghøj K,Castejon-Fernandez N,Lizano E,Hughes D,Hernandez-Rodriguez J,Korneliussen TS,Carlsen F,Siegismund HR,Mailund T,Marques-Bonet T,Hvilsom C

更新日期：2020-08-01 00:00:00

abstract：:To confirm whether sex-linked genes of the silkworm are dosage compensated or not, we investigated three RAPDs and one RFLP marker which have been mapped to the Z chromosome as candidate genes to test for dosage compensation. Northern blot analysis demonstrated that one of the RAPDs, T15.180a, is transcribed into seve...

journal_title：Heredity

authors： Suzuki MG,Shimada T,Kobayashi M

更新日期：1998-09-01 00:00:00

abstract：:Comprehensive long-term studies of isolated populations provide valuable comparative data that may be used to evaluate different methods for quantifying the relationship between genetic diversity and fitness. Here, we report on data collected from large and well-characterized cohorts of the two numerically dominant sp...

journal_title：Heredity

authors： Markert JA,Grant PR,Grant BR,Keller LF,Coombs JL,Petren K

更新日期：2004-04-01 00:00:00

abstract：:Genetic segregation was studied in more than 1900 seedlings of an F2 between the maize (Zea mays L.) inbred lines T232 and CM37. Significant segregation distortion was observed at 11 of 17 segregating allozyme loci and at a single morphological marker locus distributed on 7 of the 10 chromosomes in the genome. Deviati...

journal_title：Heredity

authors： Wendel JF,Edwards MD,Stuber CW

更新日期：1987-04-01 00:00:00

abstract：:Since transgenic crops expressing Bacillus thuringiensis (Bt) toxins were first released, resistance evolution leading to failure in control of pests populations has been observed in a number of species. Field resistance of the moth Busseola fusca was acknowledged 8 years after Bt maize was introduced in South Africa....

journal_title：Heredity

authors： Campagne P,Capdevielle-Dulac C,Pasquet R,Cornell SJ,Kruger M,Silvain JF,LeRü B,Van den Berg J

更新日期：2017-04-01 00:00:00

abstract：:The frequency of B chromosomes has been determined for several stages in the grasshopper life-cycle, over three generations, in three natural populations spanning a steep cline in East Anglia. This has revealed a rise in B frequency in prediapause eggs, a fall during the winter in the embryos and a rise in the early n...

journal_title：Heredity

authors： Robinson PM,Hewitt GM

更新日期：1976-06-01 00:00:00

abstract：:MtDNA restriction fragment polymorphisms were found between cytoplasmic male-sterility types P and R of Plantago lanceolata with the homologous probe pPl311 and maize mtDNA fragments derived from the regions of atp1, cox1 and cox2. No mtDNA differences were observed between male- sterile and restored plants with the s...

journal_title：Heredity

authors： Groenendijk CF,Sandbrink JM,Brederode JV,van Damme JM

更新日期：1997-01-01 00:00:00

abstract：:Genetic architecture and phenotypic plasticity are important considerations when studying trait variation within and among populations. Since environmental change can induce shifts in the genetic architecture and plasticity of traits, it is important to consider both genetic and environmental sources of phenotypic var...

journal_title：Heredity

authors： Venney CJ,Wellband KW,Heath DD

更新日期：2021-01-01 00:00:00

abstract：:Invasive species are believed to spread through a process of stratified dispersal consisting of short-distance diffusive spread around established foci and human mediated long-distance jumps. Brazilian peppertree (Schinus terebinthifolius), native to South America, was introduced twice as an ornamental plant into Flor...

journal_title：Heredity

authors： Williams DA,Muchugu E,Overholt WA,Cuda JP

更新日期：2007-05-01 00:00:00

abstract：:Hybrid zones provide excellent opportunities to study processes and mechanisms underlying reproductive isolation and speciation. Here we investigated sex-specific clines of molecular markers in hybrid zones of morphologically cryptic yet genetically highly-diverged evolutionary lineages of the European common vole (Mi...

journal_title：Heredity

authors： Sutter A,Beysard M,Heckel G

更新日期：2013-04-01 00:00:00

abstract：:Understanding the local and regional patterns of species distributions has been a major goal of ecological and evolutionary research. The notion that these patterns can be understood through simple quantitative rules is attractive, but while numerous scaling laws exist (e.g., metabolic, fractals), we are aware of no s...

journal_title：Heredity

authors： Bangert RK,Lonsdorf EV,Wimp GM,Shuster SM,Fischer D,Schweitzer JA,Allan GJ,Bailey JK,Whitham TG

更新日期：2008-02-01 00:00:00

abstract：:Many populations of the buprestid leaf-mining beetle, Brachys tessellatus, from central South Carolina, USA, show highly skewed sex ratios, ranging from 1.3 to 6.0 females per male. We have identified a Rickettsia bacterium that is associated with sex ratio distortion (SRD) and selective killing of male embryos in B. ...

journal_title：Heredity

authors： Lawson ET,Mousseau TA,Klaper R,Hunter MD,Werren JH

更新日期：2001-04-01 00:00:00

abstract：:Patterns of pollen dispersal were investigated in a small, isolated, relict population of Pinus sylvestris L., consisting of 36 trees. A total-exclusion battery comprising four chloroplast and two nuclear microsatellites (theoretical paternity exclusion probability EP=0.996) was used to assign paternity to 813 seeds, ...

journal_title：Heredity

authors： Robledo-Arnuncio JJ,Gil L

更新日期：2005-01-01 00:00:00

abstract：:The Hieracium and Pilosella (Lactuceae, Asteraceae) genera of closely related hawkweeds contain species with two different modes of gametophytic apomixis (asexual seed formation). Both genera contain polyploid species, and in wild populations, sexual and apomictic species co-exist. Apomixis is known to co-exist with s...

journal_title：Heredity

authors： Hand ML,Vít P,Krahulcová A,Johnson SD,Oelkers K,Siddons H,Chrtek J Jr,Fehrer J,Koltunow AM

更新日期：2015-01-01 00:00:00

abstract：:We established three closed lines of N = 10 for the guppy Poecilia reticulata, to evaluate the relationships among temporal changes in allele frequency, genetic variation and inbreeding depression for a fitness-related trait in small populations. Genetic variation at the allozyme loci, expressed by the proportion of p...

journal_title：Heredity

authors： Shikano T,Chiyokubo T,Taniguchi N

更新日期：2001-02-01 00:00:00

abstract：:RAPD-PCR polymorphisms at 57 presumptive loci were used to examine the breeding structure of the mosquito Aedes aegypti in Puerto Rico. Mosquitoes were sampled from 16 locations in six cities and samples were located in a nested spatial design to examine local patterns of gene flow. Allele frequencies were estimated a...

journal_title：Heredity

authors： Apostol BL,Black WC 4th,Reiter P,Miller BR

更新日期：1996-04-01 00:00:00

abstract：:It was shown previously that the long lifespan and juvenile phase of trees strongly attenuate founder effects during colonisation in a diffusive dispersal model. However, this model yielded too slow a colonisation rate in comparison with palynological data for temperate forest trees. Since rare long-distance dispersal...

journal_title：Heredity

authors： Austerlitz F,Garnier-Géré PH

更新日期：2003-04-01 00:00:00

abstract：:The fixation of major chromosomal rearrangements with a heterozygote disadvantage is modelled as a simple example of Wright's shifting balance process of evolution in a strongly subdivided population. Chromosomal mutations with an inferior heterozygote become fixed in a local population (or deme) by random genetic dri...

journal_title：Heredity

authors： Lande R

更新日期：1985-06-01 00:00:00