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  1. AU="Leal-Sàenz, Alejandro"
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  1. Article: Differences in cone and seed morphology of pinus strobiformis and pinus ayacahuite

    Leal-Sáenz, Alejandro / Waring, Kristen M / Sniezko, Richard A / Menon, Mitra / Hernández-Díaz, José Ciro / López-Sánchez, Carlos Antonio / Martínez-Guerrero, José Hugo / Mariscal-Lucero, Samantha Del Rocío / Silva-Cardoza, Adrián / Wehenkel, Christian

    Southwestern naturalist. 2021 May 5, v. 65, no. 1

    2021  

    Abstract: For decades there has been confusion and uncertainty on how to clearly identify the two distinct species, Pinus strobiformis Engelm. and Pinus ayacahuite Ehrenberg. Pinus ayacahuite is further defined as two varieties, var. ayacahuite and var. veitchii. ... ...

    Abstract For decades there has been confusion and uncertainty on how to clearly identify the two distinct species, Pinus strobiformis Engelm. and Pinus ayacahuite Ehrenberg. Pinus ayacahuite is further defined as two varieties, var. ayacahuite and var. veitchii. These species are of ecological importance throughout much of Mexico because they offer valuable ecosystem services. The objective in this work was to examine the morphological characteristics of cones and seeds from parent trees from six sites in northern Mexico and three sites in southern Mexico. The results show that the mean seed width and length per tree, mean cone weight per tree, and the 100-seed weight per tree were the best variables to accurately separate P. strobiformis from P. ayacahuite. Using these criteria, we found that P. ayacahuite var. veitchii is more similar to P. strobiformis than to P. ayacahuite var. ayacahuite.
    Keywords Pinus ayacahuite ; Pinus strobiformis ; ecosystems ; seed morphology ; trees ; uncertainty ; Mexico
    Language English
    Dates of publication 2021-0505
    Size p. 9-18.
    Publishing place Southwestern Association of Naturalists
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2175917-0
    ISSN 0038-4909
    ISSN 0038-4909
    DOI 10.1894/0038-4909-65.1.2
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: Assessment and Models of Insect Damage to Cones and Seeds of

    Leal-Sáenz, Alejandro / Waring, Kristen M / Álvarez-Zagoya, Rebeca / Hernández-Díaz, José Ciro / López-Sánchez, Carlos A / Martínez-Guerrero, José Hugo / Wehenkel, Christian

    Frontiers in plant science

    2021  Volume 12, Page(s) 628795

    Abstract: Insect damage to cones and seeds has a strong impact on the regeneration of conifer forest ecosystems, with broader implications for ecological and economic services. Lack of control of insect populations can lead to important economic and environmental ... ...

    Abstract Insect damage to cones and seeds has a strong impact on the regeneration of conifer forest ecosystems, with broader implications for ecological and economic services. Lack of control of insect populations can lead to important economic and environmental losses.
    Language English
    Publishing date 2021-04-29
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711035-7
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2021.628795
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Morphological Differences in

    Leal-Sáenz, Alejandro / Waring, Kristen M / Menon, Mitra / Cushman, Samuel A / Eckert, Andrew / Flores-Rentería, Lluvia / Hernández-Díaz, José Ciro / López-Sánchez, Carlos Antonio / Martínez-Guerrero, José Hugo / Wehenkel, Christian

    Frontiers in plant science

    2020  Volume 11, Page(s) 559697

    Abstract: The phenotype of trees is determined by the relationships and interactions among genetic and environmental influences. Understanding the patterns and processes that are responsible for phenotypic variation is facilitated by studying the relationships ... ...

    Abstract The phenotype of trees is determined by the relationships and interactions among genetic and environmental influences. Understanding the patterns and processes that are responsible for phenotypic variation is facilitated by studying the relationships between phenotype and the environment among many individuals across broad ecological and climatic gradients. We used
    Language English
    Publishing date 2020-10-22
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711035-7
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2020.559697
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Tracing the footprints of a moving hybrid zone under a demographic history of speciation with gene flow.

    Menon, Mitra / Landguth, Erin / Leal-Saenz, Alejandro / Bagley, Justin C / Schoettle, Anna W / Wehenkel, Christian / Flores-Renteria, Lluvia / Cushman, Samuel A / Waring, Kristen M / Eckert, Andrew J

    Evolutionary applications

    2019  Volume 13, Issue 1, Page(s) 195–209

    Abstract: A lack of optimal gene combinations, as well as low levels of genetic diversity, is often associated with the formation of species range margins. Conservation efforts rely on predictive modelling using abiotic variables and assessments of genetic ... ...

    Abstract A lack of optimal gene combinations, as well as low levels of genetic diversity, is often associated with the formation of species range margins. Conservation efforts rely on predictive modelling using abiotic variables and assessments of genetic diversity to determine target species and populations for controlled breeding, germplasm conservation and assisted migration. Biotic factors such as interspecific competition and hybridization, however, are largely ignored, despite their prevalence across diverse taxa and their role as key evolutionary forces. Hybridization between species with well-developed barriers to reproductive isolation often results in the production of offspring with lower fitness. Generation of novel allelic combinations through hybridization, however, can also generate positive fitness consequences. Despite this possibility, hybridization-mediated introgression is often considered a threat to biodiversity as it can blur species boundaries. The contribution of hybridization towards increasing genetic diversity of populations at range margins has only recently gathered attention in conservation studies. We assessed the extent to which hybridization contributes towards range dynamics by tracking spatio-temporal changes in the central location of a hybrid zone between two recently diverged species of pines:
    Language English
    Publishing date 2019-04-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 2405496-3
    ISSN 1752-4563 ; 1752-4571
    ISSN (online) 1752-4563
    ISSN 1752-4571
    DOI 10.1111/eva.12795
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: (with research data) The role of hybridization during ecological divergence of southwestern white pine (Pinus strobiformis) and limber pine (P. flexilis).

    Menon, Mitra / Bagley, Justin C / Friedline, Christopher J / Whipple, Amy V / Schoettle, Anna W / Leal-Sàenz, Alejandro / Wehenkel, Christian / Molina-Freaner, Francisco / Flores-Rentería, Lluvia / Gonzalez-Elizondo, M Socorro / Sniezko, Richard A / Cushman, Samuel A / Waring, Kristen M / Eckert, Andrew J

    Molecular ecology

    2018  Volume 27, Issue 5, Page(s) 1245–1260

    Abstract: Interactions between extrinsic factors, such as disruptive selection and intrinsic factors, such as genetic incompatibilities among loci, often contribute to the maintenance of species boundaries. The relative roles of these factors in the establishment ... ...

    Abstract Interactions between extrinsic factors, such as disruptive selection and intrinsic factors, such as genetic incompatibilities among loci, often contribute to the maintenance of species boundaries. The relative roles of these factors in the establishment of reproductive isolation can be examined using species pairs characterized by gene flow throughout their divergence history. We investigated the process of speciation and the maintenance of species boundaries between Pinus strobiformis and Pinus flexilis. Utilizing ecological niche modelling, demographic modelling and genomic cline analyses, we illustrated a divergence history with continuous gene flow. Our results supported an abundance of advanced generation hybrids and a lack of loci exhibiting steep transition in allele frequency across the hybrid zone. Additionally, we found evidence for climate-associated variation in the hybrid index and niche divergence between parental species and the hybrid zone. These results are consistent with extrinsic factors, such as climate, being an important isolating mechanism. A build-up of intrinsic incompatibilities and of coadapted gene complexes is also apparent, although these appear to be in the earliest stages of development. This supports previous work in coniferous species demonstrating the importance of extrinsic factors in facilitating speciation. Overall, our findings lend support to the hypothesis that varying strength and direction of selection pressures across the long lifespans of conifers, in combination with their other life history traits, delays the evolution of strong intrinsic incompatibilities.
    MeSH term(s) Gene Flow ; Gene Frequency ; Hybridization, Genetic ; Models, Theoretical ; Pinus/genetics ; Pinus/physiology ; Reproductive Isolation ; Species Specificity
    Language English
    Publishing date 2018-03-15
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 1126687-9
    ISSN 1365-294X ; 0962-1083
    ISSN (online) 1365-294X
    ISSN 0962-1083
    DOI 10.1111/mec.14505
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 2005/723: Show issues

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  6. Article: (with research data) The role of hybridization during ecological divergence of southwestern white pine (Pinus strobiformis) and limber pine (P. flexilis)

    Menon, Mitra / Bagley, Justin C / Cushman, Samuel A / Eckert, Andrew J / Flores‐Rentería, Lluvia / Friedline, Christopher J / Gonzalez‐Elizondo, M. Socorro / Leal‐Sàenz, Alejandro / Molina‐Freaner, Francisco / Schoettle, Anna W / Sniezko, Richard A / Waring, Kristen M / Wehenkel, Christian / Whipple, Amy V

    Molecular ecology. 2018 Mar., v. 27, no. 5

    2018  

    Abstract: Interactions between extrinsic factors, such as disruptive selection and intrinsic factors, such as genetic incompatibilities among loci, often contribute to the maintenance of species boundaries. The relative roles of these factors in the establishment ... ...

    Abstract Interactions between extrinsic factors, such as disruptive selection and intrinsic factors, such as genetic incompatibilities among loci, often contribute to the maintenance of species boundaries. The relative roles of these factors in the establishment of reproductive isolation can be examined using species pairs characterized by gene flow throughout their divergence history. We investigated the process of speciation and the maintenance of species boundaries between Pinus strobiformis and Pinus flexilis. Utilizing ecological niche modelling, demographic modelling and genomic cline analyses, we illustrated a divergence history with continuous gene flow. Our results supported an abundance of advanced generation hybrids and a lack of loci exhibiting steep transition in allele frequency across the hybrid zone. Additionally, we found evidence for climate‐associated variation in the hybrid index and niche divergence between parental species and the hybrid zone. These results are consistent with extrinsic factors, such as climate, being an important isolating mechanism. A build‐up of intrinsic incompatibilities and of coadapted gene complexes is also apparent, although these appear to be in the earliest stages of development. This supports previous work in coniferous species demonstrating the importance of extrinsic factors in facilitating speciation. Overall, our findings lend support to the hypothesis that varying strength and direction of selection pressures across the long lifespans of conifers, in combination with their other life history traits, delays the evolution of strong intrinsic incompatibilities.
    Keywords climate ; conifers ; developmental stages ; gene flow ; gene frequency ; genes ; genomics ; hybridization ; hybrids ; intrinsic factors ; life history ; loci ; models ; niches ; Pinus flexilis ; Pinus strobiformis ; reproductive isolation
    Language English
    Dates of publication 2018-03
    Size p. 1245-1260.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 1126687-9
    ISSN 1365-294X ; 0962-1083
    ISSN (online) 1365-294X
    ISSN 0962-1083
    DOI 10.1111/mec.14505
    Database NAL-Catalogue (AGRICOLA)

    Full text online

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    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 2005/723: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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