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Molecular phylogenetics of heliothin...

Cho, Soowon.

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Molecular phylogenetics of heliothinae (Lepidoptera: Noctuidae) using elongation factor-1(alpha) and dopa decarboxylase.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Molecular phylogenetics of heliothinae (Lepidoptera: Noctuidae) using elongation factor-1(alpha) and dopa decarboxylase./
作者:	Cho, Soowon.
面頁冊數:	210 p.
附註:	Source: Dissertation Abstracts International, Volume: 58-06, Section: B, page: 2829.
Contained By:	Dissertation Abstracts International58-06B.
標題:	Biology, Entomology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9736538
ISBN:	0591465787

Molecular phylogenetics of heliothinae (Lepidoptera: Noctuidae) using elongation factor-1(alpha) and dopa decarboxylase.
Cho, Soowon.

Molecular phylogenetics of heliothinae (Lepidoptera: Noctuidae) using elongation factor-1(alpha) and dopa decarboxylase. - 210 p.

Source: Dissertation Abstracts International, Volume: 58-06, Section: B, page: 2829.

Thesis (Ph.D.)--University of Maryland, College Park, 1997.

The phylogenetics of the noctuid moth subfamily Heliothinae was studied using two protein-encoding nuclear genes, elongation factor-1

ISBN: 0591465787Subjects--Topical Terms:

1018619
Biology, Entomology.

Molecular phylogenetics of heliothinae (Lepidoptera: Noctuidae) using elongation factor-1(alpha) and dopa decarboxylase.
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100 1 $a Cho, Soowon. $3 1949568
245 1 0 $a Molecular phylogenetics of heliothinae (Lepidoptera: Noctuidae) using elongation factor-1(alpha) and dopa decarboxylase.
300 $a 210 p.
500 $a Source: Dissertation Abstracts International, Volume: 58-06, Section: B, page: 2829.
500 $a Adviser: Charles Mitter.
502 $a Thesis (Ph.D.)--University of Maryland, College Park, 1997.
520 $a The phylogenetics of the noctuid moth subfamily Heliothinae was studied using two protein-encoding nuclear genes, elongation factor-1 $\ alpha $ (EF-1 $\ alpha $) and dopa decarboxylase (DDC). In Chapter I, I explore the phylogenetic utility of synonymous substitutions in EF-1 $\ alpha $, a highly conserved gene applied previously only to very ancient divergences. I sequenced 1240bp for 18 taxa representing heliothine groupings strongly supported by previous morphological and allozyme studies. The resulting tree shows almost complete concordance with the morphological tree, with low homoplasy and pairwise divergences and high transition/transversion ratios, suggesting that EF-1 $\ alpha $ will be phylogenetically informative within Heliothinae and probably other groups of similar age.
520 $a A 690 bp fragment of DDC recently studied for the same taxa proved highly concordant with both morphology and EF-1 $\ alpha $. In chapter II, I compare the two genes in detail, to evaluate the possibility of combining them to obtain a robust, detailed phylogeny. I sequenced additional 23 heliothine species for both genes, representing as many genera and species groups as possible, plus nine additional outgroups from the subfamilies Noctuinae, Stiriinae, and Plusiinae. The resulting gene trees agree strongly on relationships across Heliothinae. A randomization test for congruence between the two data sets was non-significant for Heliothinae, justifying subsequent combining of the data. The sole strong point of conflict probably represents long-branch attraction in DDC, which disappears when the data are combined. Combining the data sets increased both tree resolution and bootstrap support.
520 $a In Chapter III, DDC and EF-1 $\ alpha $ are used together to obtain a detailed estimate of heliothine relationships, based on 71 heliothines plus 14 outgroups. The results confirm previously suggested relationships and resolve many remaining uncertainties in heliothine phylogeny, particularly in relation to the placement of pests and the origins of polyphagous life histories. The two major pest groups, the corn earworm complex (Helicoverpa) and the tobacco budworm (Heliothis virescens) group, appear closely related, and belong to a larger clade (the "Heliothis group") which was ancestrally polyphagous. In the remainder of the subfamily, containing the majority of species, nearly all host-specific, polyphagy appears to have just two additional, isolated origins. Thus, host range appears to be evolutionarily quite conservative.
590 $a School code: 0117.
650 4 $a Biology, Entomology. $3 1018619
650 4 $a Biology, Molecular. $3 1017719
650 4 $a Biology, Genetics. $3 1017730
690 $a 0353
690 $a 0307
690 $a 0369
710 2 0 $a University of Maryland, College Park. $3 657686
773 0 $t Dissertation Abstracts International $g 58-06B.
790 1 0 $a Mitter, Charles, $e advisor
790 $a 0117
791 $a Ph.D.
792 $a 1997
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9736538