Ecological patterns and genetic analysis of post-dispersal seed predation in sunflower (Helianthus annuus) crop-wild hybrids.


:Crop-wild hybridization has been documented in many cultivated species, but the ecological and genetic factors that influence the likelihood or rate that cultivar alleles will introgress into wild populations are poorly understood. Seed predation is one factor that could mitigate the spread of otherwise advantageous cultivar alleles into the wild by reducing seedling recruitment of crop-like individuals in hybrid populations. Seed predation has previously been linked to several seed characters that differ between cultivated and wild sunflower, such as seed size and oil content. In this study, seed morphological and nutritional characters were measured in a segregating population of sunflower crop-wild hybrids and wild and cultivated lines. Seed predation rates among lines were then assessed in the field. The relationship between seed predation and seed characters was investigated and quantitative trait loci (QTL) were mapped for all traits. There was no effect of seed type (hybrid vs. parents) on seed predation, although a trend toward more early predation of wild seeds was observed. Within the hybrids, seed predators preferred seeds that contained more oil and energy but were lower in fibre. The relationship between seed predation and oil content was supported by co-localized QTL for these traits on one linkage group. These results suggest that oil content may be a more important determinant of seed predation than seed size and provide molecular genetic evidence for this relationship. The cultivar allele was also found to increase predation at all QTL, indicating that post-dispersal seed predation may mitigate the spread of cultivar alleles into wild populations.


Mol Ecol


Molecular ecology


Dechaine JM,Burger JC,Burke JM




Has Abstract


2010-08-01 00:00:00














  • Parallel tagged amplicon sequencing reveals major lineages and phylogenetic structure in the North American tiger salamander (Ambystoma tigrinum) species complex.

    abstract::Modern analytical methods for population genetics and phylogenetics are expected to provide more accurate results when data from multiple genome-wide loci are analysed. We present the results of an initial application of parallel tagged sequencing (PTS) on a next-generation platform to sequence thousands of barcoded P...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: O'Neill EM,Schwartz R,Bullock CT,Williams JS,Shaffer HB,Aguilar-Miguel X,Parra-Olea G,Weisrock DW

    更新日期:2013-01-01 00:00:00

  • Limited dispersal in an ectoparasitic mite, Laelaps giganteus, contributes to significant phylogeographic congruence with the rodent host, Rhabdomys.

    abstract::To explore how biogeography, parasite life history and host vagility influences evolutionary codivergences, we followed a comparative phylogeography approach using a host-specific nonpermanent mite, Laelaps giganteus, that occurs on four rodent species within the genus Rhabdomys. A mtDNA COI haplotype network derived ...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Engelbrecht A,Matthee S,du Toit N,Matthee CA

    更新日期:2016-02-01 00:00:00

  • Reconciling patterns of genetic variation with stream structure, earth history and biology in the Australian freshwater fish Craterocephalus stercusmuscarum (Atherinidae).

    abstract::We examined the consequences of barriers, stream architecture and putative dispersal capability on levels of genetic differentiation among populations of the freshwater fish Craterocephalus stercusmuscarum. Seven polymorphic allozyme loci and sequences of a 498-bp fragment of the ATPase 6 mitochondrial DNA (mtDNA) gen...

    journal_title:Molecular ecology

    pub_type: 历史文章,杂志文章


    authors: McGlashan DJ,Hughes JM

    更新日期:2000-11-01 00:00:00

  • Hybridization and adaptation to introduced balloon vines in an Australian soapberry bug.

    abstract::Contemporary adaptation of plant feeding insects to introduced hosts provides clear cases of ecologically based population divergence. In most cases the mechanisms permitting rapid differentiation are not well known. Here we study morphological and genetic variation associated with recent shifts by the Australian soap...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Andres JA,Thampy PR,Mathieson MT,Loye J,Zalucki MP,Dingle H,Carroll SP

    更新日期:2013-12-01 00:00:00

  • Phylogeography and Pleistocene refugia of the adder (Vipera berus) as inferred from mitochondrial DNA sequence data.

    abstract::In order to contribute to the debate about southern glacial refugia used by temperate species and more northern refugia used by boreal or cold-temperate species, we examined the phylogeography of a widespread snake species (Vipera berus) inhabiting Europe up to the Arctic Circle. The analysis of the mitochondrial DNA ...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Ursenbacher S,Carlsson M,Helfer V,Tegelström H,Fumagalli L

    更新日期:2006-10-01 00:00:00

  • Quantitative polymerase chain reaction analysis of DNA from noninvasive samples for accurate microsatellite genotyping of wild chimpanzees (Pan troglodytes verus).

    abstract::Noninvasive samples are useful for molecular genetic analyses of wild animal populations. However, the low DNA content of such samples makes DNA amplification difficult, and there is the potential for erroneous results when one of two alleles at heterozygous microsatellite loci fails to be amplified. In this study we ...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Morin PA,Chambers KE,Boesch C,Vigilant L

    更新日期:2001-07-01 00:00:00

  • Cohesive molecular genetic data delineate species diversity in the dinoflagellate genus Symbiodinium.

    abstract::The diversity of symbiotic dinoflagellates (Symbiodinium) in pocilloporid corals originating from various reef habitats surrounding Heron Island, southern Great Barrier Reef, was examined by targeting ribosomal, mitochondrial, and chloroplast genes using six methods that analyse for sequence differences. The ability o...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Sampayo EM,Dove S,Lajeunesse TC

    更新日期:2009-02-01 00:00:00

  • Phylogeography and mitochondrial DNA (mtDNA) diversity in North American collared lemmings (Dicrostonyx groenlandicus).

    abstract::Variation in the nucleotide sequence of the mitochondrial control region (250 bp) and the cytochrome b region (870 bp) was examined in collared lemmings (Dicrostonyx groenlandicus) from 19 localities in northern Alaska and the Canadian Arctic. The division of D. groenlandicus in two phylogeographical groups with limit...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Ehrich D,Fedorov VB,Stenseth NC,Krebs CJ,Kenney A

    更新日期:2000-03-01 00:00:00

  • Challenging the inbreeding hypothesis in a eusocial mammal: population genetics of the naked mole-rat, Heterocephalus glaber.

    abstract::The role of genetic relatedness in the evolution of eusociality has been the topic of much debate, especially when contrasting eusocial insects with vertebrates displaying reproductive altruism. The naked mole-rat, Heterocephalus glaber, was the first described eusocial mammal. Although this discovery was based on an ...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Ingram CM,Troendle NJ,Gill CA,Braude S,Honeycutt RL

    更新日期:2015-10-01 00:00:00

  • Accounting for environmental variation in co-occurrence modelling reveals the importance of positive interactions in root-associated fungal communities.

    abstract::Understanding the role of interspecific interactions in shaping ecological communities is one of the central goals in community ecology. In fungal communities, measuring interspecific interactions directly is challenging because these communities are composed of large numbers of species, many of which are unculturable...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Abrego N,Roslin T,Huotari T,Tack AJM,Lindahl BD,Tikhonov G,Somervuo P,Schmidt NM,Ovaskainen O

    更新日期:2020-07-01 00:00:00

  • Structure and evolution of the sea star egg receptor for sperm bindin.

    abstract::Selection on coevolving sperm- and egg-recognition molecules is a potent engine of population divergence leading to reproductive isolation and speciation. The study of receptor-ligand pairs can reveal co-evolution of male- and female-expressed genes or differences between their evolution in response to selective facto...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Hart MW

    更新日期:2013-04-01 00:00:00

  • Fine-grained adaptive divergence in an amphibian: genetic basis of phenotypic divergence and the role of nonrandom gene flow in restricting effective migration among wetlands.

    abstract::Adaptive ecological differentiation among sympatric populations is promoted by environmental heterogeneity, strong local selection and restricted gene flow. High gene flow, on the other hand, is expected to homogenize genetic variation among populations and therefore prevent local adaptation. Understanding how local a...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Richter-Boix A,Quintela M,Kierczak M,Franch M,Laurila A

    更新日期:2013-03-01 00:00:00

  • The use and misuse of regression models in landscape genetic analyses.

    abstract::The field of landscape genetics has been rapidly evolving, adopting and adapting analytical frameworks to address research questions. Current studies are increasingly using regression-based frameworks to infer the individual contributions of landscape and habitat variables on genetic differentiation. This paper outlin...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Peterman WE,Pope NS

    更新日期:2020-10-31 00:00:00

  • Intraspecific specialization of the generalist parasitoid Cotesia sesamiae revealed by polyDNAvirus polymorphism and associated with different Wolbachia infection.

    abstract::As a result of an intense host-parasite evolutionary arms race, parasitic wasps frequently display high levels of specialization on very few host species. For instance, in braconid wasps very few generalist species have been described. However, within this family, Cotesia sesamiae is a generalist species that is wides...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Branca A,LE Ru BP,Vavre F,Silvain JF,Dupas S

    更新日期:2011-03-01 00:00:00

  • Tests of species-specific models reveal the importance of drought in postglacial range shifts of a Mediterranean-climate tree: insights from integrative distributional, demographic and coalescent modelling and ABC model selection.

    abstract::Past climate change has caused shifts in species distributions and undoubtedly impacted patterns of genetic variation, but the biological processes mediating responses to climate change, and their genetic signatures, are often poorly understood. We test six species-specific biologically informed hypotheses about such ...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Bemmels JB,Title PO,Ortego J,Knowles LL

    更新日期:2016-10-01 00:00:00

  • Do the same genes underlie parallel phenotypic divergence in different Littorina saxatilis populations?

    abstract::Parallel patterns of adaptive divergence and speciation are cited as powerful evidence for the role of selection driving these processes. However, it is often not clear whether parallel phenotypic divergence is underlain by parallel genetic changes. Here, we asked about the genetic basis of parallel divergence in the ...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Westram AM,Galindo J,Alm Rosenblad M,Grahame JW,Panova M,Butlin RK

    更新日期:2014-09-01 00:00:00

  • Genomic characterization of sex-identification markers in Sebastes carnatus and Sebastes chrysomelas rockfishes.

    abstract::Fish have evolved a variety of sex-determining (SD) systems including male heterogamy (XY), female heterogamy (ZW) and environmental SD. Little is known about SD mechanisms of Sebastes rockfishes, a highly speciose genus of importance to evolutionary and conservation biology. Here, we characterize the sex determinatio...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Fowler BL,Buonaccorsi VP

    更新日期:2016-05-01 00:00:00

  • Genomic consequences of a recent three-way admixture in supplemented wild brown trout populations revealed by local ancestry tracts.

    abstract::Understanding the evolutionary consequences of human-mediated introductions of domesticated strains into the wild and their subsequent admixture with natural populations is of major concern in conservation biology. However, the genomic impacts of stocking from distinct sources (locally derived vs. divergent) on the ge...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Leitwein M,Gagnaire PA,Desmarais E,Berrebi P,Guinand B

    更新日期:2018-09-01 00:00:00

  • The comparative genomic landscape of adaptive radiation in crater lake cichlid fishes.

    abstract::Factors ranging from ecological opportunity to genome composition might explain why only some lineages form adaptive radiations. While being rare, particular systems can provide natural experiments within an identical ecological setting where species numbers and phenotypic divergence in two closely related lineages ar...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Xiong P,Hulsey CD,Fruciano C,Wong WY,Nater A,Kautt AF,Simakov O,Pippel M,Kuraku S,Meyer A,Franchini P

    更新日期:2020-12-11 00:00:00

  • Unrelated queens coexist in colonies of the termite Macrotermes michaelseni.

    abstract::Relatedness increases the likelihood of cooperation within colonies of social insects. Polygyny, the coexistence of numerous reproductive females (queens) in a colony, is common in mature colonies of the termite Macrotermes michaelseni. In this species, polygyny results from pleometrosis and from several female alates...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Hacker M,Kaib M,Bagine RK,Epplen JT,Brandl R

    更新日期:2005-04-01 00:00:00

  • Stochastic exits from dormancy give rise to heavy-tailed distributions of descendants in bacterial populations.

    abstract::Variance in reproductive success is a major determinant of the degree of genetic drift in a population. While many plants and animals exhibit high variance in their number of progeny, far less is known about these distributions for microorganisms. Here, we used a strain barcoding approach to quantify variability in of...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Wright ES,Vetsigian KH

    更新日期:2019-09-01 00:00:00

  • Polymorphism of intron-1 in the voltage-gated sodium channel gene of Anopheles gambiae s.s. populations from Cameroon with emphasis on insecticide knockdown resistance mutations.

    abstract::Sequence variation at the intron-1 of the voltage-gated sodium channel gene in Anopheles gambiae M- and S-forms from Cameroon was assessed to explore the number of mutational events originating knockdown resistance (kdr) alleles. Mosquitoes were sampled between December 2005 and June 2006 from three geographical areas...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Etang J,Vicente JL,Nwane P,Chouaibou M,Morlais I,Do Rosario VE,Simard F,Awono-Ambene P,Toto JC,Pinto J

    更新日期:2009-07-01 00:00:00

  • Unravelling the invasion history of the Asian tiger mosquito in Europe.

    abstract::Multiple introductions are key features for the establishment and persistence of introduced species. However, little is known about the contribution of genetic admixture to the invasive potential of populations. To address this issue, we studied the recent invasion of the Asian tiger mosquito (Aedes albopictus) in Eur...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Sherpa S,Blum MGB,Capblancq T,Cumer T,Rioux D,Després L

    更新日期:2019-05-01 00:00:00

  • Jumping genes: Genomic ballast or powerhouse of biological diversification.

    abstract::Studying hybridization has the potential to elucidate challenging questions in evolutionary biology such as the nature of adaptive genetic variation and reproductive isolation. A growing body of work highlights that the merging of divergent genomes goes beyond the reshuffling of standing variation from related species...

    journal_title:Molecular ecology

    pub_type: 评论,新闻


    authors: Choudhury RR,Parisod C

    更新日期:2017-09-01 00:00:00

  • Enhanced diversity and aflatoxigenicity in interspecific hybrids of Aspergillus flavus and Aspergillus parasiticus.

    abstract::Aspergillus flavus and A. parasiticus are the two most important aflatoxin-producing fungi responsible for the contamination of agricultural commodities worldwide. Both species are heterothallic and undergo sexual reproduction in laboratory crosses. Here we examine the possibility of interspecific matings between A. f...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Olarte RA,Worthington CJ,Horn BW,Moore GG,Singh R,Monacell JT,Dorner JW,Stone EA,Xie DY,Carbone I

    更新日期:2015-04-01 00:00:00

  • Molecular phylogenies reveal host-specific divergence of Ophiocordyceps unilateralis sensu lato following its host ants.

    abstract::Ophiocordyceps unilateralis (Hypocreales, Ascomycetes) is an entomopathogenic fungus specific to formicine ants (Formicinae, Hymenoptera). Previous works have shown that the carpenter ant Camponotus leonardi acts as the principal host with occasional infections of ants from the genus Polyrhachis (sister genus of Campo...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Kobmoo N,Mongkolsamrit S,Tasanathai K,Thanakitpipattana D,Luangsa-Ard JJ

    更新日期:2012-06-01 00:00:00

  • Natural hybridization between Senecio jacobaea and Senecio aquaticus: molecular and chemical evidence.

    abstract::Hybridization is known to be involved in a number of evolutionary processes, including species formation, and the generation of novel defence characteristics in plants. The genus Senecio of the Asteraceae family is highly speciose and has historically demonstrated significant levels of interspecific hybridization. The...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Kirk H,Macel M,Klinkhamer PG,Vrieling K

    更新日期:2004-08-01 00:00:00

  • Phylogeography, hybridization and Pleistocene refugia of the kob antelope (Kobus kob).

    abstract::Mitochondrial DNA control region sequences and seven microsatellites were used to estimate the genetic structuring, evolutionary history and historic migration patterns of the kob antelope (Kobus kob). Ten populations were analysed, representing the three recognized K. kob subspecies: K. k. kob in west Africa, K. k. t...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Lorenzen ED,De Neergaard R,Arctander P,Siegismund HR

    更新日期:2007-08-01 00:00:00

  • Strategies for microsatellite isolation: a review.

    abstract::In the last few years microsatellites have become one of the most popular molecular markers used with applications in many different fields. High polymorphism and the relative ease of scoring represent the two major features that make microsatellites of large interest for many genetic studies. The major drawback of mi...

    journal_title:Molecular ecology

    pub_type: 杂志文章,评审


    authors: Zane L,Bargelloni L,Patarnello T

    更新日期:2002-01-01 00:00:00

  • A genetic similarity rule determines arthropod community structure.

    abstract::We define a genetic similarity rule that predicts how genetic variation in a dominant plant affects the structure of an arthropod community. This rule applies to hybridizing cottonwood species where plant genetic variation determines plant-animal interactions and structures a dependent community of leaf-modifying arth...

    journal_title:Molecular ecology

    pub_type: 杂志文章


    authors: Bangert RK,Turek RJ,Rehill B,Wimp GM,Schweitzer JA,Allan GJ,Bailey JK,Martinsen GD,Keim P,Lindroth RL,Whitham TG

    更新日期:2006-04-01 00:00:00