eCommons

 

ESTABLISHING A SYSTEM TO UNCOVER THE ROLE OF THE NEURAL CREST IN THE DOMESTICATION OF THE FOX VULPES VULPES

Other Titles

Abstract

The mechanisms underlying the gain and loss of traits in natural selection remains a central question in biology. A valuable model to examine how selection acts to modify the body plan is domestication. As far back as 1868, Charles Darwin had noted in The Variation of Plants and Animals under Domestication that in diverse cases of domestication of mammals, a striking set of similar phenotypes emerge. These changes were not limited to behavior, but also included morphological changes in coat color, teeth size, craniofacial structures, and tail and ear development. In the 1950s, Dmitry K. Belyaev sought to explore domestication dynamics by breeding the silver fox (Vulpes vulpes) under stringent selection of a single trait, friendliness. Interestingly, the same domestication phenotypes re-appeared. Tame foxes showed higher instances of loss of pigmentation at the extremities of the body, a reduction in size of the snout and teeth, and a three- to five-fold reduction in adrenal cortisol. While domestication traits may appear unrelated, studies in developmental biology have revealed that many of these morphological features share a common embryonic origin. Much of the skull, the adrenal medulla, head and trunk pigment melanoblasts, and teeth precursors are derived from neural crest cells. The neural crest is an embryonic, multipotent stem cell population that originates from the dorsal section of the neural tube, migrates, and gives rise to dozens of cell-types in vertebrate embryos. While the neural crest has been speculated to be the link between the emergent traits of domestication syndrome, the molecular, cellular, and genomic changes underlying these phenotypes remain unresolved. To tackle this, I utilized cell reprogramming strategies to begin creating an in vitro model to molecularly and cellularly explore the role of the neural crest in domestication.

Journal / Series

Volume & Issue

Description

56 pages

Sponsorship

Date Issued

2020-08

Publisher

Keywords

crest; development; domestication; neural; silver fox; syndrome

Location

Effective Date

Expiration Date

Sector

Employer

Union

Union Local

NAICS

Number of Workers

Committee Chair

Simoes-Costa, Marcos

Committee Co-Chair

Committee Member

Clark, Andrew
Wolfner, Mariana Federica

Degree Discipline

Biochemistry, Molecular and Cell Biology

Degree Name

M.S., Biochemistry, Molecular and Cell Biology

Degree Level

Master of Science

Related Version

Related DOI

Related To

Related Part

Based on Related Item

Has Other Format(s)

Part of Related Item

Related To

Related Publication(s)

Link(s) to Related Publication(s)

References

Link(s) to Reference(s)

Previously Published As

Government Document

ISBN

ISMN

ISSN

Other Identifiers

Rights

Rights URI

Types

dissertation or thesis

Accessibility Feature

Accessibility Hazard

Accessibility Summary

Link(s) to Catalog Record