| 1. |
- Bergstrand, Karl-Johan, et al.
(författare)
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Nulägesanalys trädgård
- 2018
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Rapport (populärvet., debatt m.m.)abstract
- Rapporten Nulägesanalys - trädgård har genomförts inom ramen för projektgruppen Insatsstyrka trädgård. Syftet med inventeringen har varit att ge svar på vem som jobbar med trädgårdsvetenskap, vilka forskargrupper och med vilka forskningsämnen, samt identifiera framtida arbetsfält inom ämnet trädgårdsvetenskap och därmed ge uppslag för framtida utveckling av forskningsfält, utbildning och samverkan. I detta ingår att kartlägga trädgårdsvetenskaplig forskning, utbildning och samverkan vid SLU. Nulägesanalysen förväntas därmed ge en grund för fortsatt strategiskt arbete med att utveckla ämnet trädgårdsvetenskap (Horticultural Science) utifrån inventerade resurser och förutsättningar.
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| 2. |
- Leo, Jonatan
(författare)
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Elymus in South America - an overview
- 2020
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The tribe Triticeae (in Poaceae, the grass family) contains some of the economically most important crop species in the world such as wheat, barley and rye, as well as several more or less locally important forage crops, especially in Asia and North America. The wild species of the tribe constitutes an underutilized genetic resource for crop improvement through selection and breeding. Species within the tribe could potentially be used directly as forage crops, after initial selection from wild material, or as a resource in future forage or crop improvement. In South America, the two major genera of Triticeae are Hordeum and Elymus. Hordeum has been well collected in South America and the taxonomy and phylogeny have been studied, but there is less knowledge about Elymus from this continent and far less material has been collected. Fundamental knowledge of taxonomy, nomenclature, phylogeny, genetic variation, population structures and gene flow needs to be investigated. Further information about the ecology, agricultural qualities and nutritional content is needed for optimal utilization and conservation. This paper gives an overview of the characteristics of Triticeae in general, and Elymus in South America in particular. The purpose is to map the state of knowledge and identify gaps for future research.
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| 3. |
- Leo, Jonatan
(författare)
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Phylogenetic studies of Elymus s.s. L. (Poaceae) : plant systematics as a prerequisite for efficient conservation and utilization
- 2022
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Elymus (wild-rye), in the tribe Triticeae, is a diverse genus and contains about 150 species growing in a wide range of habitats in temperate areas all over the world. The species are wild relatives to some of the most important cereal crops like bread wheat, durum wheat, rye, and barley. The genus is considered a genetic resource and contains many valuable traits that could be used in future crop breeding for sustainable agriculture. Several species are used today as forage grasses and others could potentially be introduced as new crops. To fully explore, exploit and conserve the genetic diversity of Elymus, basic knowledge of the systematics of the genus is needed. This thesis focus on Elymus s.s., including only species with an StH genome combination, and investigates the phylogeny and phylogeography on different taxonomical levels: within a species (Paper I), within a region (Paper II) and within a genus (Paper III). Genotyping-By-Sequencing techniques were used to explore the relationships, diversification, generic structure, migration, and origin of the genus. The results indicate separate origins of American and Eurasian species and show a complex relationship between Elymus in South and North America with multiple migration events. The thesis gives insights into the evolutionary history of Elymus s.s. and provides phylogenetic data for further taxonomical work within the genus.
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| 4. |
- Leo, Jonatan, et al.
(författare)
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Population structure and phylogeography of Elymus mutabilis and its genetic relationships with E. transbaicalensis (Poaceae)
- 2022
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Ingår i: Nordic Journal of Botany. - : Wiley. - 0107-055X .- 1756-1051.
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Tidskriftsartikel (refereegranskat)abstract
- Elymus mutabilis is a morphologically diverse species in the Poaceae family growing in Eurasia from northern Europe to far east Russia and southwards to central Asia. Elymus transbaicalensis occurs in similar habitats and is considered closely related to E. mutabilis and sometimes even referred to as a subspecies or synonym. Based on high similarity in morphology and habitat, molecular studies are needed to establish whether E. mutabilis and E. transbaicalensis can be considered as two distinct species. Thus, the objective of this study was to study diversity, relationships among populations and the phylogeographical structure of E. mutabilis and E. transbaicalensis using genotyping-by-sequencing (GBS). In total 68 individuals of E. mutabilis were sampled from 18 populations collected from northern Europe, central Asia and far east Russia, representing the central and two peripheral parts of the natural distribution of the species. The results reveal a clear distinction between E. mutabilis and E. transbaicalensis and no introgression. The phylogeographic structure of E. mutabilis follows the geographical distribution of the species. Populations from northern Europe, southern Siberia and far east Russia together form a clade separated from the peripheral populations in central Asia, indicating a common ancestry of the latter. Phylogenetic analyses revealed a radiation pattern among populations in northern Europe indicating a founding followed by rapid dispersal.
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