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Genetic and Phenotypic Diversity Wit...

Wilson, Shelby Anastasia,

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Genetic and Phenotypic Diversity Within and Among Isolated Populations of the Erigeron strigosus (Asteraceae) Species Complex in Western North Carolina /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Genetic and Phenotypic Diversity Within and Among Isolated Populations of the Erigeron strigosus (Asteraceae) Species Complex in Western North Carolina // Shelby Anastasia Wilson.
Author:	Wilson, Shelby Anastasia,
Description:	1 electronic resource (68 pages)
Notes:	Source: Masters Abstracts International, Volume: 86-11.
Contained By:	Masters Abstracts International86-11.
Subject:	Botany. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31243776
ISBN:	9798314871270

Genetic and Phenotypic Diversity Within and Among Isolated Populations of the Erigeron strigosus (Asteraceae) Species Complex in Western North Carolina /
Wilson, Shelby Anastasia,

Genetic and Phenotypic Diversity Within and Among Isolated Populations of the Erigeron strigosus (Asteraceae) Species Complex in Western North Carolina /Shelby Anastasia Wilson. - 1 electronic resource (68 pages)

Source: Masters Abstracts International, Volume: 86-11.

The Erigeron strigosus Muhl. Ex Willd (Asteraceae) species complex is composed of late spring to early summer herbs that are widespread in North America. Many populations of this complex are polyploid and apomictic, but studies have identified sexual diploid populations specializing on glade habitats throughout the southeastern United States, several of which have been described as new species. Two unusual Erigeron populations were recently discovered in Jackson Co., western North Carolina: one on an olivine outcrop that displays distinct morphological and phenological variation from other E. strigosus, and a second on a high-elevation, mafic rock outcrop that is taller, has more stems, and is rhizomatous. Plants from both populations were confirmed to be sexually reproducing diploids based on megagametophyte development and phylogenetically distinct from each other based on nrDNA ITS and ETS regions. However, additional genetic and environmental information was needed to determine whether these populations constitute different species from each other and from similar diploid populations elsewhere. The primary objective of this study was to determine the species status of two unusual populations of Erigeron in WNC by comparing them both to one another and to similar glade populations in Arkansas. Amplified Fragment Length Polymorphisms (AFLP) provide an efficient system for genetic fingerprinting, and AFLP fingerprints for each plant sample were generated for analysis to compare to diploid populations in AR and confirm initial sequence data results. Genetic distance data from AFLPs and morphological data collected in the field and from a greenhouse common garden experiment indicate distinct groupings of WNC populations. Additionally, we collected soil pH and nutrient data and measured reproductive and vegetative morphological traits on plants from populations of interest in western North Carolina to further analyze the variation found among populations in this complex. Variation in plant height, basal leaf size, and hair characters appear to be distinctive within this population. These methods have provided valuable insight into genetic, environmental, and morphological differences across populations and geographic localities, in tandem indicating an undescribed species of Erigeron in Webster, NC.

English

ISBN: 9798314871270Subjects--Topical Terms:

516217
Botany.
Subjects--Index Terms:

Amplified Fragment Length Polymorphisms

Genetic and Phenotypic Diversity Within and Among Isolated Populations of the Erigeron strigosus (Asteraceae) Species Complex in Western North Carolina /
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520 $a The Erigeron strigosus Muhl. Ex Willd (Asteraceae) species complex is composed of late spring to early summer herbs that are widespread in North America. Many populations of this complex are polyploid and apomictic, but studies have identified sexual diploid populations specializing on glade habitats throughout the southeastern United States, several of which have been described as new species. Two unusual Erigeron populations were recently discovered in Jackson Co., western North Carolina: one on an olivine outcrop that displays distinct morphological and phenological variation from other E. strigosus, and a second on a high-elevation, mafic rock outcrop that is taller, has more stems, and is rhizomatous. Plants from both populations were confirmed to be sexually reproducing diploids based on megagametophyte development and phylogenetically distinct from each other based on nrDNA ITS and ETS regions. However, additional genetic and environmental information was needed to determine whether these populations constitute different species from each other and from similar diploid populations elsewhere. The primary objective of this study was to determine the species status of two unusual populations of Erigeron in WNC by comparing them both to one another and to similar glade populations in Arkansas. Amplified Fragment Length Polymorphisms (AFLP) provide an efficient system for genetic fingerprinting, and AFLP fingerprints for each plant sample were generated for analysis to compare to diploid populations in AR and confirm initial sequence data results. Genetic distance data from AFLPs and morphological data collected in the field and from a greenhouse common garden experiment indicate distinct groupings of WNC populations. Additionally, we collected soil pH and nutrient data and measured reproductive and vegetative morphological traits on plants from populations of interest in western North Carolina to further analyze the variation found among populations in this complex. Variation in plant height, basal leaf size, and hair characters appear to be distinctive within this population. These methods have provided valuable insight into genetic, environmental, and morphological differences across populations and geographic localities, in tandem indicating an undescribed species of Erigeron in Webster, NC.
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650 4 $a Biology. $3 522710
650 4 $a Plant sciences. $3 3173832
653 $a Amplified Fragment Length Polymorphisms
653 $a Apomixis
653 $a Asteraceae
653 $a Common garden
653 $a Erigeron strigosus
653 $a Polyploidy
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690 $a 0306
690 $a 0479
710 2 $a Western Carolina University. $b Biology. $e degree granting institution. $3 3826531
720 1 $a Mathews, Katherine $e degree supervisor.
773 0 $t Masters Abstracts International $g 86-11.
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