Abstract：
:We have developed a new model for mating system analysis, which attempts to distinguish among alternative modes of self-oriented mating within populations. This model jointly estimates the rates of outcrossing, selfing, automixis and apomixis, through the use of information in the family structure given by dominant genetic marker data. The method is presented, its statistical properties evaluated, and is applied to three arctic Easter daisy populations, one consisting of diploids, the other two of tetraploids. The tetraploids are predominantly male sterile and reported to be apomictic while the diploids are male fertile. In each Easter daisy population, 10 maternal arrays of six progeny were assayed for amplified fragment length polymorphism markers. Estimates, confirmed with likelihood ratio tests of mating hypotheses, showed apomixis to be predominant in all populations (ca. 70%), but selfing or automixis was moderate (ca. 25%) in tetraploids. It was difficult to distinguish selfing from automixis, and simulations confirm that with even very large sample sizes, the estimates have a very strong negative statistical correlation, for example, they are not independent. No selfing or automixis was apparent in the diploid population, instead, moderate levels of outcrossing were detected (23%). Low but significant levels of outcrossing (2-4%) seemed to occur in the male-sterile tetraploid populations; this may be due to genotyping error of this level. Overall, this study shows apomixis can be partial, and provides evidence for higher levels of inbreeding in polyploids compared to diploids and for significant levels of apomixis in a diploid plant population.
journal_name
Heredity (Edinb)journal_title
Heredityauthors
Thompson SL,Ritland Kdoi
10.1038/sj.hdy.6800844subject
Has Abstractpub_date
2006-08-01 00:00:00pages
119-26issue
2eissn
0018-067Xissn
1365-2540pii
6800844journal_volume
97pub_type
杂志文章相关文献
HEREDITY文献大全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
pub_type： 杂志文章
doi：10.1038/hdy.1986.63
更新日期：1986-06-01 00:00:00
abstract：:The theory, construction and optimization of a model of chromosome pairing in triploid hybrids are re-examined and the model reconstructed. A new approach to optimization is described that removes a bias in the estimation of x, the measure of relative affinity, by weighting the observed and calculated meiotic figure f...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.1992.16
更新日期：1992-02-01 00:00:00
abstract：:Population genetics theory predicts loss in genetic variability because of drift and inbreeding in isolated plant populations; however, it has been argued that long-distance pollination and seed dispersal may be able to maintain gene flow, even in highly fragmented landscapes. We tested how historical effective popula...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.2015.30
更新日期：2015-09-01 00:00:00
abstract：:A total of 76 sweet cherry genotypes were screened with 34 microsatellite primer pairs previously developed in peach. Amplification of SSR loci was obtained for 24 of the microsatellite primer pairs, and 14 of them produced polymorphic amplification patterns. On the basis of polymorphism and quality of amplification, ...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/sj.hdy.6800101
更新日期：2002-07-01 00:00:00
abstract：:A general prediction of the neutral theory of evolution is that genetic diversity should correlate positively with effective population size. We show here that diversity across eight microsatellite loci was consistently and substantially lower in one common amphibian (Bufo bufo) than in another with similar life histo...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/sj.hdy.6800391
更新日期：2004-02-01 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
pub_type： 杂志文章
doi：10.1038/sj.hdy.6800243
更新日期：2003-04-01 00:00:00
abstract：:Knowing the variances and heritabilities (h(2)) of life history traits in populations living under natural conditions is necessary for a mechanistic understanding of respective evolutionary processes. I estimated heritabilities of several life history traits, including dispersal rate, body mass, age at first reproduct...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/sj.hdy.6801056
更新日期：2008-01-01 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
pub_type： 杂志文章
doi：10.1038/hdy.2013.99
更新日期：2014-03-01 00:00:00
abstract：:Knowledge of the degree of temporal stability of population genetic structure and composition is important for understanding microevolutionary processes and addressing issues of human impact of natural populations. We know little about how representative single samples in time are to reflect population genetic constit...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.2012.36
更新日期：2012-10-01 00:00:00
abstract：:Geographical range is considered a good predictor of the levels of isozyme variation in plants. Widespread species, often consisting of historically larger and more continuous populations, maintain higher polymorphism and are less affected by drift, which tends to erode genetic variation in more geographically restric...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1046/j.1365-2540.2001.00906.x
更新日期：2001-09-01 00:00:00
abstract：:The prevalence of Haldane's rule suggests that sex chromosomes commonly have a key role in reproductive barriers and speciation. However, the majority of research on Haldane's rule has been conducted in species with conventional sex determination systems (XY and ZW) and exceptions to the rule have been understudied. H...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.2016.127
更新日期：2017-06-01 00:00:00
abstract：:Host-plant resistance is an effective method for controlling soybean aphid (Aphis glycines Matsumura), the most damaging insect pest of soybean (Glycine max (L.) Merr.) in North America. Recently, resistant soybean lines have been discovered and at least four aphid resistance genes (Rag1, Rag2, Rag3 and rag4) have bee...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.2013.10
更新日期：2013-07-01 00:00:00
abstract：:Phlebotomus ariasi is one of the two sandflies transmitting the causative agent of zoonotic leishmaniasis, Leishmania infantum, in France and Iberia, and provides a rare case study of the postglacial re-colonization of France by a Mediterranean species. Four DNA sequences were analysed-mitochondrial cytochrome b (cyt ...
journal_title：Heredity
pub_type： 历史文章,杂志文章
doi：10.1038/hdy.2010.111
更新日期：2011-05-01 00:00:00
abstract：:Deleterious mutations accumulating on non-recombining Y chromosomes can drive XY to XY turnovers, as they allow to replace the old mutation-loaded Y by a new mutation-free one. The same process is thought to prevent XY to ZW turnovers, because the latter requires fixation of the ancestral Y, assuming dominance of the ...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/s41437-019-0225-z
更新日期：2019-09-01 00:00:00
abstract：:Recent studies concerning molecular mechanisms of genetic recombination in eukaryotes are reviewed. Since many of these studies have focused on the testable predictions arising from the hybrid DNA theory of genetic recombination, this theory is summarised. Experiments to determine the time of meiotic crossing-over and...
journal_title：Heredity
pub_type： 杂志文章,评审
doi：10.1038/hdy.1977.61
更新日期：1977-10-01 00:00:00
abstract：:Recent studies in empirical population genetics have highlighted the importance of taking into account both neutral and adaptive genetic variation in characterizing microevolutionary dynamics. Here, we explore the genetic population structure and the footprints of selection in four populations of the warm-temperate co...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.2011.120
更新日期：2012-05-01 00:00:00
abstract：:Podisma pedestris exists as both an XO and neoXY form in the Southern French Alps. These chromosome types are shown to be contiguously allopatric and hybrid populations have been located in several places. Hybridisation appears to be occurring freely, but the hybrid zones are quite narrow. In several places the two di...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.1975.108
更新日期：1975-12-01 00:00:00
abstract：:Prolific breeds of domestic sheep (Ovis aries) are important genetic resources due to their reproductive performance, which is characterized by multiple lambs per birth and out-of-season breeding. However, the lack of a comprehensive understanding of the genetic mechanisms underlying the important reproductive traits,...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/s41437-018-0090-1
更新日期：2019-02-01 00:00:00
abstract：:The parasitoid Cotesia glomerata usually produces female-biased sex ratios in the field, which are presumably caused by inbreeding and local mate competition (LMC); yet, sibling mating increases the production of males, leading to the male-biased sex ratio of broods in the laboratory. Previous studies have suggested t...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/sj.hdy.6800829
更新日期：2006-06-01 00:00:00
abstract：:Understanding the evolution of female multiple mating (polyandry) is crucial for understanding sexual selection and sexual conflict. Despite this interest, little is known about its genetic basis or whether genetics influences the evolutionary origin or maintenance of polyandry. Here, we explore the quantitative genet...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/sj.hdy.6800897
更新日期：2007-02-01 00:00:00
abstract：:Recent developments in the analysis of density dependent competition in Drosophila melanogaster have identified two distinct parameters, namely the competitive pressure or aggression exerted by a genotype and the sensitivity or response of a genotype to such aggression. Assuming that response is more related to the ef...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.1988.34
更新日期：1988-04-01 00:00:00
abstract：:Genomic selection (GS) potentially offers an unparalleled advantage over traditional pedigree-based selection (TS) methods by reducing the time commitment required to carry out a single cycle of tree improvement. This quality is particularly appealing to tree breeders, where lengthy improvement cycles are the norm. We...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.2015.57
更新日期：2015-12-01 00:00:00
abstract：:Genetic variation that is expressed only under specific environmental conditions can contribute to additional adverse effects of inbreeding if environmental conditions change. We present a proteomic characterization of a conditional lethal found in an inbred line of Drosophila melanogaster. The lethal effect is appare...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.2009.132
更新日期：2010-02-01 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
pub_type： 杂志文章
doi：10.1038/hdy.1976.47
更新日期：1976-06-01 00:00:00
abstract：:A variety of questions in population and evolutionary biology are studied using chloroplast DNA (cpDNA). The presumed maternal inheritance in angiosperms allows for certain assumptions and calculations to be made when studying plant hybridization, phylogeography, molecular systematics and seed dispersal. Further, the ...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.2008.11
更新日期：2008-06-01 00:00:00
abstract：:Recent genetic studies have shown that introgression rates among loci may greatly vary according to their location in the genome. In particular, several cases of mito-nuclear discordances have been reported for a wide range of organisms. In the present study, we examine the causes of discordance between mitochondrial ...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.2013.98
更新日期：2014-03-01 00:00:00
abstract：:The ubiquity of satellite DNA (satDNA) sequences has raised much controversy over the abundance of divergent monomer variants and the long-time nucleotide sequence stability observed for many satDNA families. In this work, we describe the satDNA BIV160, characterized in nine species of the three main bivalve clades (P...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.2009.141
更新日期：2010-06-01 00:00:00
abstract：:Gene flow was investigated in Anopheles gambiae from eight localities that span the ecological zones of Nigeria (arid savanna zones in the north gradually turn into humid forest zones in the south). Genetic differentiation was measured over 10 microsatellite loci and, to determine any effects of selection, five loci w...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1046/j.1365-2540.2001.00957.x
更新日期：2001-12-01 00:00:00
abstract：:Experiments were carried out to correlate the cytological localization of DNA polymerase alpha with the presence of its specific mRNA in human lymphocytes studied at different times after phytohaemagglutinin stimulation. Our data indicated that in resting cells it is not possible to detect DNA polymerase alpha protein...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/hdy.1996.123
更新日期：1996-08-01 00:00:00
abstract：:In early 1992, the European bumblebee, Bombus terrestris, was first seen in Tasmania and currently has spread to most of the island. Here, we report on the genetic structure, using micro-satellites, of the invading population from samples collected in the years 1998-2000, a few years after the first sighting of the sp...
journal_title：Heredity
pub_type： 杂志文章
doi：10.1038/sj.hdy.6801017
更新日期：2007-10-01 00:00:00
