A molecular and population genetics study of the Bluff Oyster (Ostrea chilensis)
New Zealand has a long history of isolation and has evolved a unique biota. Spanning from a sub-tropical climate in the North to a sub-Antarctic climate in the far south New Zealand provides an interesting opportunity to study the processes that lead to evolution. This thesis attempts to study the e...
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Victoria University of Wellington
2015
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ftvuwellington:oai:researcharchive.vuw.ac.nz:10063/4263 2023-08-15T12:38:52+02:00 A molecular and population genetics study of the Bluff Oyster (Ostrea chilensis) Thomas, Leighton James Gardner, Jonathan Ritchie, Peter 2015 http://researcharchive.vuw.ac.nz/handle/10063/4263 en_NZ eng Victoria University of Wellington http://researcharchive.vuw.ac.nz/handle/10063/4263 Population genetics Oysters New Zealand Text Doctoral 2015 ftvuwellington 2023-07-25T17:24:59Z New Zealand has a long history of isolation and has evolved a unique biota. Spanning from a sub-tropical climate in the North to a sub-Antarctic climate in the far south New Zealand provides an interesting opportunity to study the processes that lead to evolution. This thesis attempts to study the evolution of Ostrea chilensis at a population genetics and molecular level. Chapter Two: Microsatellite DNA loci represent an ideal marker for population genetics studies due to high levels of length polymorphism between individuals. Genomic sequencing technologies offer the potential to quickly identify thousands of loci, from which PCR primers can be developed and screened for polymorphisms. I aimed to develop PCR primers to amplify length polymorphic microsatellite loci and to use the genomic data set to elucidate patterns and processes of microsatellite evolution. DNA was extracted from a single Ostrea chilensis individual and used for a 1/8 plate sequencing run on a Roche 454. The subsequent quality checked DNA database was annotated for microsatellite loci. 6,208 dinucleotide, 7,326 trinucleotide repeats, 2,414 tetranucleotide, 33 hexanucleotide and 356 pentanucleotides were annotated on the partial genome. Four microsatellite loci were successfully amplified and genotyped. The loci have a low number of alleles compared to other bivalve studies and two have significant departures from HWE (Fst = 0.126 and -0.348). There were a number of highly significant BLAST hits (< 1xE⁻²⁰) with repetitive Oyster DNA sequences obtained from GenBank. Due to difficulties the microsatellite loci were abandoned as markers for later population genetic analysis. This work, however, provides the ground work for further developments of PCR primers for polymorphic microsatellite DNA and provides some observations of molecular evolution of repetitive DNA, which will lead to a greater understanding of these sequences. Chapter Three: This chapter forms the first population genetic study of Ostrea chilensis using New Zealand and Chilean ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Victoria University of Wellington: ResearchArchive Antarctic New Zealand The Bluff ENVELOPE(-61.567,-61.567,-64.367,-64.367) |
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collection |
Victoria University of Wellington: ResearchArchive |
op_collection_id |
ftvuwellington |
language |
English |
topic |
Population genetics Oysters New Zealand |
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Population genetics Oysters New Zealand Thomas, Leighton James A molecular and population genetics study of the Bluff Oyster (Ostrea chilensis) |
topic_facet |
Population genetics Oysters New Zealand |
description |
New Zealand has a long history of isolation and has evolved a unique biota. Spanning from a sub-tropical climate in the North to a sub-Antarctic climate in the far south New Zealand provides an interesting opportunity to study the processes that lead to evolution. This thesis attempts to study the evolution of Ostrea chilensis at a population genetics and molecular level. Chapter Two: Microsatellite DNA loci represent an ideal marker for population genetics studies due to high levels of length polymorphism between individuals. Genomic sequencing technologies offer the potential to quickly identify thousands of loci, from which PCR primers can be developed and screened for polymorphisms. I aimed to develop PCR primers to amplify length polymorphic microsatellite loci and to use the genomic data set to elucidate patterns and processes of microsatellite evolution. DNA was extracted from a single Ostrea chilensis individual and used for a 1/8 plate sequencing run on a Roche 454. The subsequent quality checked DNA database was annotated for microsatellite loci. 6,208 dinucleotide, 7,326 trinucleotide repeats, 2,414 tetranucleotide, 33 hexanucleotide and 356 pentanucleotides were annotated on the partial genome. Four microsatellite loci were successfully amplified and genotyped. The loci have a low number of alleles compared to other bivalve studies and two have significant departures from HWE (Fst = 0.126 and -0.348). There were a number of highly significant BLAST hits (< 1xE⁻²⁰) with repetitive Oyster DNA sequences obtained from GenBank. Due to difficulties the microsatellite loci were abandoned as markers for later population genetic analysis. This work, however, provides the ground work for further developments of PCR primers for polymorphic microsatellite DNA and provides some observations of molecular evolution of repetitive DNA, which will lead to a greater understanding of these sequences. Chapter Three: This chapter forms the first population genetic study of Ostrea chilensis using New Zealand and Chilean ... |
author2 |
Gardner, Jonathan Ritchie, Peter |
format |
Doctoral or Postdoctoral Thesis |
author |
Thomas, Leighton James |
author_facet |
Thomas, Leighton James |
author_sort |
Thomas, Leighton James |
title |
A molecular and population genetics study of the Bluff Oyster (Ostrea chilensis) |
title_short |
A molecular and population genetics study of the Bluff Oyster (Ostrea chilensis) |
title_full |
A molecular and population genetics study of the Bluff Oyster (Ostrea chilensis) |
title_fullStr |
A molecular and population genetics study of the Bluff Oyster (Ostrea chilensis) |
title_full_unstemmed |
A molecular and population genetics study of the Bluff Oyster (Ostrea chilensis) |
title_sort |
molecular and population genetics study of the bluff oyster (ostrea chilensis) |
publisher |
Victoria University of Wellington |
publishDate |
2015 |
url |
http://researcharchive.vuw.ac.nz/handle/10063/4263 |
long_lat |
ENVELOPE(-61.567,-61.567,-64.367,-64.367) |
geographic |
Antarctic New Zealand The Bluff |
geographic_facet |
Antarctic New Zealand The Bluff |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://researcharchive.vuw.ac.nz/handle/10063/4263 |
_version_ |
1774300360992620544 |