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Reproductive Ecology and Genetics of...

Balogh, Christopher M.

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Reproductive Ecology and Genetics of Plant Invasions: A Case Study of Lythrum salicaria (Purple Loosestrife).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Reproductive Ecology and Genetics of Plant Invasions: A Case Study of Lythrum salicaria (Purple Loosestrife)./
作者:	Balogh, Christopher M.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	322 p.
附註:	Source: Dissertation Abstracts International, Volume: 80-03(E), Section: B.
Contained By:	Dissertation Abstracts International80-03B(E).
標題:	Evolution & development. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10816903
ISBN:	9780438680029

Reproductive Ecology and Genetics of Plant Invasions: A Case Study of Lythrum salicaria (Purple Loosestrife).
Balogh, Christopher M.

Reproductive Ecology and Genetics of Plant Invasions: A Case Study of Lythrum salicaria (Purple Loosestrife). - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 322 p.

Source: Dissertation Abstracts International, Volume: 80-03(E), Section: B.

Thesis (Ph.D.)--University of Toronto (Canada), 2018.

Biological invasions provide a valuable context for studying contemporary evolution. Because reproduction is a key process determining invasion success, investigations of the reproductive ecology and genetics of populations are particularly insightful. My Ph.D. thesis is comprised of five inter-related studies on Lythrum salicaria (purple loosestrife), a tristylous plant from Eurasia that has invaded wetlands in North America during the past 150 years. The specific questions I addressed, using computer simulations, surveys of natural populations, and glasshouse and field experiments, concerned the mechanisms governing the frequencies of mating types in populations, the characteristics and functional significance of partial self-incompatibility, the influence of floral morph structure and demography on mating and fertility, and the occurrence and significance of inbreeding depression for invading populations.

ISBN: 9780438680029Subjects--Topical Terms:

3172418
Evolution & development.

Reproductive Ecology and Genetics of Plant Invasions: A Case Study of Lythrum salicaria (Purple Loosestrife).
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245 1 0 $a Reproductive Ecology and Genetics of Plant Invasions: A Case Study of Lythrum salicaria (Purple Loosestrife).
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 322 p.
500 $a Source: Dissertation Abstracts International, Volume: 80-03(E), Section: B.
500 $a Adviser: Spencer C.H. Barrett.
502 $a Thesis (Ph.D.)--University of Toronto (Canada), 2018.
520 $a Biological invasions provide a valuable context for studying contemporary evolution. Because reproduction is a key process determining invasion success, investigations of the reproductive ecology and genetics of populations are particularly insightful. My Ph.D. thesis is comprised of five inter-related studies on Lythrum salicaria (purple loosestrife), a tristylous plant from Eurasia that has invaded wetlands in North America during the past 150 years. The specific questions I addressed, using computer simulations, surveys of natural populations, and glasshouse and field experiments, concerned the mechanisms governing the frequencies of mating types in populations, the characteristics and functional significance of partial self-incompatibility, the influence of floral morph structure and demography on mating and fertility, and the occurrence and significance of inbreeding depression for invading populations.
520 $a Stochastic computer models incorporating morph-specific self-compatibility and tetrasomic inheritance revealed patterns of morph-frequency variation and asymmetric morph loss consistent with data from L. salicaria, including a survey I conducted in Ontario of 114 populations that revealed stochastic loss of the S-morph from small populations. Glasshouse experiments involving controlled self- and cross-pollination demonstrated that &sim;34% of L. salicaria plants exhibited partial self-incompatibility, that this trait was weakly heritable, and was stable in expression over two years. Progeny testing of open-pollinated families in six populations and isolated plants in a field experiment revealed high rates of inter-morph mating demonstrating that L. salicaria is robust to demographic variation associated with colonization. Cumulative estimates of inbreeding depression (&dgr;) in a four-year experiment, three under field conditions, revealed &dgr; = 0.48 and 0.68, depending on how multiplicative fitness was estimated. The values were consistent with the outcrossed mating system of populations and high enough to oppose the spread of self-fertilization, unless pollinators or mates limit fertility, but lower than is frequently reported in other outcrossing plant species.
520 $a In summary, this research provides novel information on the mechanisms that maintain tristyly in invasive populations of L. salicaria, despite the occurrence of partial self- incompatibility. High rates of inter-morph mating promoted by reliable bee-mediated pollinator service limit opportunities for the breakdown of the polymorphism, an evolutionary transition that has commonly occurred in other invasive tristylous species.
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