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Drought Response, Hybridization, and Ecological Isolation in Sympatric Mimulus Species.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Drought Response, Hybridization, and Ecological Isolation in Sympatric Mimulus Species./
作者:	Mantel, Samuel J.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
面頁冊數:	172 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-12, Section: B.
Contained By:	Dissertations Abstracts International83-12B.
標題:	Genetics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29062005
ISBN:	9798834016281

Drought Response, Hybridization, and Ecological Isolation in Sympatric Mimulus Species.
Mantel, Samuel J.

Drought Response, Hybridization, and Ecological Isolation in Sympatric Mimulus Species. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 172 p.

Source: Dissertations Abstracts International, Volume: 83-12, Section: B.

Thesis (Ph.D.)--University of Georgia, 2022.

This item must not be sold to any third party vendors.

Understanding how reproductive isolation is maintained in diverged species is integral to understanding species preservation and the evolutionary dynamics of natural sympatric systems. Are partially reproductively isolated species which hybridize at some level destined to merge into a single species, or can isolation be maintained despite the homogenizing effects of geneflow? Ecological isolation, based in divergent selection to variable ecological conditions in partially isolated taxa, has been implicated as an important factor maintaining species boundaries in the face of hybridization. Here we aim to understand the phenotypic and genetic basis of important divergent drought response traits in sympatric sister species, Mimulus guttatus and M. nasutus, which may play and important role in maintaining species boundaries when the species exist in sympatry. Under water-limited conditions we have identified substantial differentiation in survival and seed set between sympatric M. guttatus and M. nasutus in the greenhouse. Consistent with observed microhabitat differences in the field, M. guttatus was almost completely unable to produce seeds under drought conditions. While M. nasutus was able to decrease flower and seed maturation time under drought, M. guttatus was unable to do so. This difference may be indicative of differential evolution of plasticity to a water limiting environment in Mimulus, which may contribute to immigrant inviability and maladaptation in hybrids. In a custom-made mapping population of admixed individuals made from a M. nasutus and three M. guttatus parental lines, we investigate the phenotypic and genetic basis of this divergent drought response in sympatric Mimulus which holds considerable promise for identifying genomic variation responsible for reproductive isolation in this system.

ISBN: 9798834016281Subjects--Topical Terms:

530508
Genetics.
Subjects--Index Terms:

Drought

Drought Response, Hybridization, and Ecological Isolation in Sympatric Mimulus Species.
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506 $a This item must not be sold to any third party vendors.
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590 $a School code: 0077.
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650 4 $a Plant sciences. $3 3173832
650 4 $a Ecology. $3 516476
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653 $a Drought
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