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  • 1
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    Online Resource
    Genomic basis of European ash tree resistance to ash dieback fungus
    Springer Science and Business Media LLC ; 2019
    In:  Nature Ecology & Evolution Vol. 3, No. 12 ( 2019-11-18), p. 1686-1696
    Details
    In: Nature Ecology & Evolution, Springer Science and Business Media LLC, Vol. 3, No. 12 ( 2019-11-18), p. 1686-1696
    Type of Medium: Online Resource
    ISSN: 2397-334X
    URL: Article
    DOI: 10.1038/s41559-019-1036-6
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2019
    detail.hit.zdb_id: 2879715-2
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  • 2
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    Evidence for the Widespread Occurrence of Bacteria Implicated in Acute Oak Decline from Incidental Genetic Sampling
    MDPI AG ; 2021
    In:  Forests Vol. 12, No. 12 ( 2021-12-01), p. 1683-
    Details
    In: Forests, MDPI AG, Vol. 12, No. 12 ( 2021-12-01), p. 1683-
    Abstract: Acute Oak Decline (AOD) is complex syndrome affecting Britain’s keystone native oak species, (Quercus robur L. and Q. petraea L. (Matt.) Liebl.), in some cases causing mortality within five years of symptom development. The most distinguishable symptom is weeping stem lesions, from which four species of bacteria have been isolated: Brenneria goodwinii, Gibbsiella quercinecans, Lonsdalea britannica and Rahnella victoriana. We do not yet know where else these bacteria exist, and little is known about the relationship of the wider oak leaf microbiome (phyllosphere) to acute oak decline. Here we investigate whether incidental evidence from a large oak genome re-sequencing dataset could be used to detect these bacteria in oak foliage, and whether bacterial incidence co-varied with AOD status or location. Oak leaves and buds were sampled from 421 trees at five sites in England. Whole genomic DNA from these samples was shot-gun sequenced with short reads. Non-oak reads were extracted from these data and queried to microbial databases. Reads uniquely matching AOD-associated bacterial genomes were found to be present on trees from all five sites and included trees with active lesions, trees with historic lesions and trees without AOD symptoms. The abundance of the AOD-associated bacteria did not differ between tree health categories but did differ among sites. We conclude that the AOD-associated bacteria may be members of the normal oak microbiome, whose presence on a tree is not sufficient to cause AOD symptoms.
    Type of Medium: Online Resource
    ISSN: 1999-4907
    URL: Article
    DOI: 10.3390/f12121683
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2527081-3
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  • 3
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    Development of anonymous cDNA microarrays to study changes to the Senecio floral transcriptome during hybrid speciation
    Wiley ; 2005
    In:  Molecular Ecology Vol. 14, No. 8 ( 2005-07), p. 2493-2510
    Details
    In: Molecular Ecology, Wiley, Vol. 14, No. 8 ( 2005-07), p. 2493-2510
    Type of Medium: Online Resource
    ISSN: 0962-1083 , 1365-294X
    URL: Issue
    URL: Article
    DOI: 10.1111/mec.2005.14.issue-8
    DOI: 10.1111/j.1365-294x.2005.02608.x
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2005
    detail.hit.zdb_id: 2020749-9
    detail.hit.zdb_id: 1126687-9
    SSG: 12
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  • 4
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    Molecular footprints of the H olocene retreat of dwarf birch in B ritain
    Wiley ; 2014
    In:  Molecular Ecology Vol. 23, No. 11 ( 2014-06), p. 2771-2782
    Details
    In: Molecular Ecology, Wiley, Vol. 23, No. 11 ( 2014-06), p. 2771-2782
    Abstract: Past reproductive interactions among incompletely isolated species may leave behind a trail of introgressed alleles, shedding light on historical range movements. B etula pubescens is a widespread native tetraploid tree species in B ritain, occupying habitats intermediate to those of its native diploid relatives, B . pendula and B . nana . Genotyping 1134 trees from the three species at 12 microsatellite loci, we found evidence of introgression from both diploid species into B . pubescens , despite the ploidy difference. Surprisingly, introgression from B . nana , a dwarf species whose present range is highly restricted in northern, high‐altitude peat bogs, was greater than introgression from B . pendula , which is morphologically similar to B . pubescens and has a substantially overlapping range. A cline of introgression from B . nana was found extending into B . pubescens populations far to the south of the current B . nana range. We suggest that this genetic pattern is a footprint of a historical decline and/or northwards shift in the range of B . nana populations due to climate warming in the Holocene. This is consistent with pollen records that show a broader, more southerly distribution of B . nana in the past. Ecological niche modelling predicts that B . nana is adapted to a larger range than it currently occupies, suggesting additional factors such as grazing and hybridization may have exacerbated its decline. We found very little introgression between B . nana and B . pendula , despite both being diploid, perhaps because their distributions in the past have rarely overlapped. Future conservation of B . nana may partly depend on minimization of hybridization with B . pubescens , and avoidance of planting B . pendula near B . nana populations.
    Type of Medium: Online Resource
    ISSN: 0962-1083 , 1365-294X
    URL: Issue
    URL: Article
    DOI: 10.1111/mec.2014.23.issue-11
    DOI: 10.1111/mec.12768
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2014
    detail.hit.zdb_id: 2020749-9
    detail.hit.zdb_id: 1126687-9
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  • 5
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    Maintenance and expansion of genetic and trait variation following domestication in a clonal crop
    Wiley ; 2023
    In:  Molecular Ecology Vol. 32, No. 15 ( 2023-08), p. 4165-4180
    Details
    In: Molecular Ecology, Wiley, Vol. 32, No. 15 ( 2023-08), p. 4165-4180
    Abstract: ኢ‐ጾታዊ‐መራቦ ተመራጭ ባሂሪን የሚያስከትሉ የሰብል ይዘተ‐በራሂዎች በተፋጠነ ሁኔታ እየተለዩ እንዲባዙ ያደርጋል። ይሁን እንጂ የጾታዊ መራቦ አለመኖር የበራሂ ተለያይነት መመናመንና ጎጂ የሆነ በራሂያዊ‐ቅየራን ሊያበራክት ይችላል። ይህ ሁኔታ ደግሞ የሰብል ተክሎችን በሽታንም ሆነ የአየር ንብረት ለውጥን የመቋቋም ባህሪ ሊቀንስ ይችላል። በእነዚህ አሉታዊና አዎንታዊ ገጽታዎች ረገድ ያለውን ሁኔታ በተሻለ መገንዘብን ባለመ ሁኔታ ከስራስር ሰብሎች አንዱ በሆነው የእንሰት ተክል ተላምዶና በራሂያዊ ተለያይነት ላይ ያተኮረ የባህሪ ትንተና ጥናት ተከናውኗል። እንሰት በአፍሪካ ከሚገኙ የሙዝ ዝሪያዎች ወገን የሚመደብ ሲሆን ከ20 ሚሊዮን ለሚበልጡ ኢትዮጵያውያን አብይ የኃይል ሰጪ ምግብ ምንጭ ነው። እንሰት ከእርሻ ሰብለነት ባለፈ በዱር በቀልነትም ይገኛል። ዱር በቀሉ እንሰት የማይበላ ሆኖ የመራቢያ ዘዴው ጾታዊ ነው። በሰብልነት የሚለማው እንሰት በጾታዊ መንገድ ሊራባ ቢችልም አርሶ አደሮች ኢ‐ጾታዊ‐መራቦን በመጠቀም ያባዙታል። በዚህም መንገድ በመቶዎች የሚቆጠሩ የተለየ ባህሪና ስያሜ ያላቸው አይነቴዎች እንዲበለጽጉ ሆኗል። በዚህ ጥናት ቲ.ጂ.ቢ.ኤስ. (tGBS) ሲኩዌንሲነግ የተባለ ዘዴን በመጠቀም የ192 አይነቴዎችን ይዘተ‐በራሂዎች የማንበብ ሥራ የተከናወነ ሲሆን 1340 አርሶ አደሮችን በማሳተፍ በአይነቴዎቹ ባህሪ ዙሪ መረጃ ተሰብስቧል፡፡ በሰብልነት በሚለማው የእንሰት ወገን የድቅል በራሂያዊነት ይዘት አነስተኛ ሲሆን ይህም በማላማዱ ሂደት የተከሰተው በራሂያዊ ደፈቃ ከዱር በቀሉ ብዝሀነት 37% ተለያይነት ብቻ እንዲወረስ ካሳረፈው ተጽእኖ ጋር የሚቆራኝ ነው፡፡ ይሁን እንጂ አልፎ አልፎ ጎጂ የሆነ በራሂያዊ‐ቅየራ በድቅል‐በራሂ መልክ የሚከሰት መሆኑ በኢ‐ጾታዊ መንገድ በሚራባው የተላመደው የእንሰት ወገን ላይ በጊዜ ሂደት የበራሂያዊ‐ቅየራ ጫና እየበረታ መሄዱን ያመለክታል። በአጠቃላይ የጥናት ውጤቱ እንደሚያሳየው ዋና ዋናዎቹ የእንሰት የዘር ሀረጎች የተከሰቱት ቀደም ሲል በነበረ በራሂያዊ‐ብወዛ፣ በማላማዱ ሂደት በተከሰተ በራሂያዊ ደፈቃና ይህን ተከትሎ በተፈጠረ የተለያይነት መመናመን፣ አንዲሁም በዘመናትነ የማላመድ ሂደት ጠቃሚነት ያላቸውን ይዘተ‐በራሂዎች ከማበራከት ጋር በተያያዘ በተደረጉ መረጣዎች ምክንያት ነው። ከተላመዱ የእንሰት አይነቴዎች አንጻር ጠንካራ የምግብነት፣ የንጥረ‐ምግብ እና በሽታን የመቋቋም ስርወዘራዊ የባህሪ መመሳሰል የተስተዋለ ቢሆንም በመካከላቸ ወቅታዊ በራሂያዊ‐ብወዛ ስለመኖሩ የሚያሳይ የጠነከረ መረጃ አልተገኘም፡፡ መጻኢው የብዛዘር ጥበቃና አስተዳደር የአየር ንብረት ለውጥን ከመቋቋም አካያ በጾታዊ‐መራቦ መንገድ የሰብል ህብረዘር ማጎልበትን ተፈላጊ ሊያደርግ የሚችልበት ሁኔታ ቢኖርም ይህ የተዋልዶ ዘዴ መሰል‐በራሂን በማበራከት አሉታዊ ተጽእኖ ሊያሳርፍ እንደሚችል ይታሰባል። ይህም እውነታ በእንሰት ልማት የኢ‐ጾታዊ‐መራቦ ዘዴ ተዘውታሪና ብቸኛ አማራጭ ስለመሆኑ መሰረታዊ ምክንያት ተደርጎ ሊወሰድ ይችላል
    Type of Medium: Online Resource
    ISSN: 0962-1083 , 1365-294X
    URL: Issue
    URL: Article
    DOI: 10.1111/mec.v32.15
    DOI: 10.1111/mec.17033
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2020749-9
    detail.hit.zdb_id: 1126687-9
    SSG: 12
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  • 6
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    Genome sequence and genetic diversity of European ash trees
    Springer Science and Business Media LLC ; 2017
    In:  Nature Vol. 541, No. 7636 ( 2017-1), p. 212-216
    Details
    In: Nature, Springer Science and Business Media LLC, Vol. 541, No. 7636 ( 2017-1), p. 212-216
    Type of Medium: Online Resource
    ISSN: 0028-0836 , 1476-4687
    URL: Article
    DOI: 10.1038/nature20786
    RVK:
    TA 1000
    RVK:
    UA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2017
    detail.hit.zdb_id: 120714-3
    detail.hit.zdb_id: 1413423-8
    SSG: 11
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  • 7
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    Genetic diversity maintained among fragmented populations of a tree undergoing range contraction
    Springer Science and Business Media LLC ; 2018
    In:  Heredity Vol. 121, No. 4 ( 2018-10), p. 304-318
    Details
    In: Heredity, Springer Science and Business Media LLC, Vol. 121, No. 4 ( 2018-10), p. 304-318
    Type of Medium: Online Resource
    ISSN: 0018-067X , 1365-2540
    URL: Article
    DOI: 10.1038/s41437-018-0132-8
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2018
    detail.hit.zdb_id: 2006446-9
    detail.hit.zdb_id: 2423-5
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  • 8
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    Unidirectional diploid–tetraploid introgression among British birch trees with shifting ranges shown by restriction site‐associated markers
    Wiley ; 2016
    In:  Molecular Ecology Vol. 25, No. 11 ( 2016-06), p. 2413-2426
    Details
    In: Molecular Ecology, Wiley, Vol. 25, No. 11 ( 2016-06), p. 2413-2426
    Abstract: Hybridization may lead to introgression of genes among species. Introgression may be bidirectional or unidirectional, depending on factors such as the demography of the hybridizing species, or the nature of reproductive barriers between them. Previous microsatellite studies suggested bidirectional introgression between diploid Betula nana (dwarf birch) and tetraploid B. pubescens (downy birch) and also between B. pubescens and diploid B. pendula (silver birch) in Britain. Here, we analyse introgression among these species using 51 237 variants in restriction site‐associated ( RAD ) markers in 194 individuals, called with allele dosages in the tetraploids. In contrast to the microsatellite study, we found unidirectional introgression into B. pubescens from both of the diploid species. This pattern fits better with the expected nature of the reproductive barrier between diploids and tetraploids. As in the microsatellite study, introgression into B. pubescens showed clear clines with increasing introgression from B. nana in the north and from B. pendula in the south. Unlike B. pendula alleles, introgression of B. nana alleles was found far from the current area of sympatry or allopatry between B. nana and B. pubescens . This pattern fits a shifting zone of hybridization due to Holocene reduction in the range of B. nana and expansion in the range of B. pubescens .
    Type of Medium: Online Resource
    ISSN: 0962-1083 , 1365-294X
    URL: Issue
    URL: Article
    DOI: 10.1111/mec.2016.25.issue-11
    DOI: 10.1111/mec.13644
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2020749-9
    detail.hit.zdb_id: 1126687-9
    SSG: 12
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  • 9
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    Genomic assessment of local adaptation in dwarf birch to inform assisted gene flow
    Wiley ; 2020
    In:  Evolutionary Applications Vol. 13, No. 1 ( 2020-01), p. 161-175
    Details
    In: Evolutionary Applications, Wiley, Vol. 13, No. 1 ( 2020-01), p. 161-175
    Abstract: When populations of a rare species are small, isolated and declining under climate change, some populations may become locally maladapted. Detecting this maladaptation may allow effective rapid conservation interventions, even if based on incomplete knowledge. Population maladaptation may be estimated by finding genome–environment associations (GEA) between allele frequencies and environmental variables across a local species range, and identifying populations whose allele frequencies do not fit with these trends. We can then design assisted gene flow strategies for maladapted populations, to adjust their allele frequencies, entailing lower levels of intervention than with undirected conservation action. Here, we investigate this strategy in Scottish populations of the montane plant dwarf birch ( Betula nana ). In genome‐wide restriction site‐associated single nucleotide polymorphism (SNP) data, we found 267 significant associations between SNP loci and environmental variables. We ranked populations by maladaptation estimated using allele frequency deviation from the general trends at these loci; this gave a different prioritization for conservation action than the Shapely Index, which seeks to preserve rare neutral variation. Populations estimated to be maladapted in their allele frequencies at loci associated with annual mean temperature were found to have reduced catkin production. Using an environmental niche modelling (ENM) approach, we found annual mean temperature (35%), and mean diurnal range (15%), to be important predictors of the dwarf birch distribution. Intriguingly, there was a significant correlation between the number of loci associated with each environmental variable in the GEA and the importance of that variable in the ENM. Together, these results suggest that the same environmental variables determine both adaptive genetic variation and species range in Scottish dwarf birch. We suggest an assisted gene flow strategy that aims to maximize the local adaptation of dwarf birch populations under climate change by matching allele frequencies to current and future environments.
    Type of Medium: Online Resource
    ISSN: 1752-4571 , 1752-4571
    URL: Issue
    URL: Article
    DOI: 10.1111/eva.v13.1
    DOI: 10.1111/eva.12883
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2405496-3
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  • 10
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    Genome sequence of dwarf birch ( Betula nana ) and cross‐species RAD markers
    Wiley ; 2013
    In:  Molecular Ecology Vol. 22, No. 11 ( 2013-06), p. 3098-3111
    Details
    In: Molecular Ecology, Wiley, Vol. 22, No. 11 ( 2013-06), p. 3098-3111
    Abstract: New sequencing technologies allow development of genome‐wide markers for any genus of ecological interest, including plant genera such as Betula (birch) that have previously proved difficult to study due to widespread polyploidy and hybridization. We present a de novo reference genome sequence assembly, from 66× short read coverage, of Betula nana (dwarf birch) – a diploid that is the keystone woody species of subarctic scrub communities but of conservation concern in Britain. We also present 100 bp PstI RAD markers for B. nana and closely related Betula tree species. Assembly of RAD markers in 15 individuals by alignment to the reference B. nana genome yielded 44–86k RAD loci per individual, whereas de novo RAD assembly yielded 64–121k loci per individual. Of the loci assembled by the de novo method, 3k homologous loci were found in all 15 individuals studied, and 35k in 10 or more individuals. Matching of RAD loci to RAD locus catalogues from the B. nana individual used for the reference genome showed similar numbers of matches from both methods of RAD locus assembly but indicated that the de novo RAD assembly method may overassemble some paralogous loci. In 12 individuals hetero‐specific to B. nana 37–47k RAD loci matched a catalogue of RAD loci from the B. nana individual used for the reference genome, whereas 44–60k RAD loci aligned to the B. nana reference genome itself. We present a preliminary study of allele sharing among species, demonstrating the utility of the data for introgression studies and for the identification of species‐specific alleles.
    Type of Medium: Online Resource
    ISSN: 0962-1083 , 1365-294X
    URL: Issue
    URL: Article
    DOI: 10.1111/mec.2013.22.issue-11
    DOI: 10.1111/mec.12131
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2013
    detail.hit.zdb_id: 2020749-9
    detail.hit.zdb_id: 1126687-9
    SSG: 12
    Location Call Number Limitation Availability
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