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Variation among native and alien populations of hoary mustard, Hirschfeldia incana (L.) Lagreze-Fossat, and the application of DNA melting analysis to investigate microsatellite (SSR) variation. / Melvin N. E Smith

Swansea University Author: Melvin N. E Smith

Abstract

H. incana is a native species of the Mediterranean and Middle East. As a neophyte (alien) it has undergone a large range expansion in Northern Europe, the Americas, Asia and Australasia. Casual field observations suggested that within its native range, the dominant life strategy of H.incana was annu...

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Published: 2010
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa42609
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last_indexed 2019-10-21T16:48:08Z
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spelling 2018-09-03T10:13:16.2641208 v2 42609 2018-08-02 Variation among native and alien populations of hoary mustard, Hirschfeldia incana (L.) Lagreze-Fossat, and the application of DNA melting analysis to investigate microsatellite (SSR) variation. e0ae497808adda6edaa6fe1d9a018451 NULL Melvin N. E Smith Melvin N. E Smith true true 2018-08-02 H. incana is a native species of the Mediterranean and Middle East. As a neophyte (alien) it has undergone a large range expansion in Northern Europe, the Americas, Asia and Australasia. Casual field observations suggested that within its native range, the dominant life strategy of H.incana was annual, whereas in the British flora it was predominantly perennial. Populations from native and alien ranges were studied in the field and in common garden experiments. Phenotypic differences in morphological and physiological characteristics were compared. Plants derived from neophyte British populations made larger leaf rosettes, flowered later (> 140 days) and exhibited a perennial life cycle. Plants from native. North African and Southern European populations (excepting those from montane Spain) made smaller rosettes, flowered early (<110 days) and died after flowering once. Neophyte populations from California were similar to native populations. Some native populations (e.g. Cypress) did not survive a British winter. Unlike native populations, initiation of flowering in neophyte British populations was stimulated by a period of vernalisation. These results suggest that life strategy changes have occurred in neophyte populations of H. incana as this species expanded its range northwards, and implies possible genetic differences. Ten microsatellite primers, previously described for related Brassicaceae species, were therefore investigated for potential use in the assessment of H. incana population genetic structure. Five primers successfully amplified a product of expected size, of which 3 were subscequently sequenced to confirm the presence of the SSR. The application of real-time PCR DNA melting analysis to identify SSR variation was investigated using Roche SYBR green and Corbett HRM platforms. SSR variation could be detected using DNA melt analysis, but due to difficulty identifying the composition of heterozygous SSR's the technique could not be sufficiently refined to investigate population diversity. However, preliminary results indicated possible SSR variation between isolated populations. E-Thesis Botany.;Ecology.;Bioinformatics. 31 12 2010 2010-12-31 COLLEGE NANME Biosciences COLLEGE CODE Swansea University Doctoral Ph.D 2018-09-03T10:13:16.2641208 2018-08-02T16:24:29.8369989 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Melvin N. E Smith NULL 1 0042609-02082018162507.pdf 10805367.pdf 2018-08-02T16:25:07.9470000 Output 10943494 application/pdf E-Thesis true 2018-08-02T16:25:07.9470000 false
title Variation among native and alien populations of hoary mustard, Hirschfeldia incana (L.) Lagreze-Fossat, and the application of DNA melting analysis to investigate microsatellite (SSR) variation.
spellingShingle Variation among native and alien populations of hoary mustard, Hirschfeldia incana (L.) Lagreze-Fossat, and the application of DNA melting analysis to investigate microsatellite (SSR) variation.
Melvin N. E Smith
title_short Variation among native and alien populations of hoary mustard, Hirschfeldia incana (L.) Lagreze-Fossat, and the application of DNA melting analysis to investigate microsatellite (SSR) variation.
title_full Variation among native and alien populations of hoary mustard, Hirschfeldia incana (L.) Lagreze-Fossat, and the application of DNA melting analysis to investigate microsatellite (SSR) variation.
title_fullStr Variation among native and alien populations of hoary mustard, Hirschfeldia incana (L.) Lagreze-Fossat, and the application of DNA melting analysis to investigate microsatellite (SSR) variation.
title_full_unstemmed Variation among native and alien populations of hoary mustard, Hirschfeldia incana (L.) Lagreze-Fossat, and the application of DNA melting analysis to investigate microsatellite (SSR) variation.
title_sort Variation among native and alien populations of hoary mustard, Hirschfeldia incana (L.) Lagreze-Fossat, and the application of DNA melting analysis to investigate microsatellite (SSR) variation.
author_id_str_mv e0ae497808adda6edaa6fe1d9a018451
author_id_fullname_str_mv e0ae497808adda6edaa6fe1d9a018451_***_Melvin N. E Smith
author Melvin N. E Smith
author2 Melvin N. E Smith
format E-Thesis
publishDate 2010
institution Swansea University
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 1
active_str 0
description H. incana is a native species of the Mediterranean and Middle East. As a neophyte (alien) it has undergone a large range expansion in Northern Europe, the Americas, Asia and Australasia. Casual field observations suggested that within its native range, the dominant life strategy of H.incana was annual, whereas in the British flora it was predominantly perennial. Populations from native and alien ranges were studied in the field and in common garden experiments. Phenotypic differences in morphological and physiological characteristics were compared. Plants derived from neophyte British populations made larger leaf rosettes, flowered later (> 140 days) and exhibited a perennial life cycle. Plants from native. North African and Southern European populations (excepting those from montane Spain) made smaller rosettes, flowered early (<110 days) and died after flowering once. Neophyte populations from California were similar to native populations. Some native populations (e.g. Cypress) did not survive a British winter. Unlike native populations, initiation of flowering in neophyte British populations was stimulated by a period of vernalisation. These results suggest that life strategy changes have occurred in neophyte populations of H. incana as this species expanded its range northwards, and implies possible genetic differences. Ten microsatellite primers, previously described for related Brassicaceae species, were therefore investigated for potential use in the assessment of H. incana population genetic structure. Five primers successfully amplified a product of expected size, of which 3 were subscequently sequenced to confirm the presence of the SSR. The application of real-time PCR DNA melting analysis to identify SSR variation was investigated using Roche SYBR green and Corbett HRM platforms. SSR variation could be detected using DNA melt analysis, but due to difficulty identifying the composition of heterozygous SSR's the technique could not be sufficiently refined to investigate population diversity. However, preliminary results indicated possible SSR variation between isolated populations.
published_date 2010-12-31T03:53:18Z
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score 11.012678

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