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Genetic analysis of mitochondria in rainbow trout, Oncorhynchus mykiss.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Genetic analysis of mitochondria in rainbow trout, Oncorhynchus mykiss./
作者:	Brown, Kim H.
面頁冊數:	1 online resource (116 pages)
附註:	Source: Dissertations Abstracts International, Volume: 66-12, Section: B.
Contained By:	Dissertations Abstracts International66-12B.
標題:	Genetics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3160468click for full text (PQDT)
ISBN:	9780496940776

Genetic analysis of mitochondria in rainbow trout, Oncorhynchus mykiss.
Brown, Kim H.

Genetic analysis of mitochondria in rainbow trout, Oncorhynchus mykiss. - 1 online resource (116 pages)

Source: Dissertations Abstracts International, Volume: 66-12, Section: B.

Thesis (Ph.D.)--Washington State University, 2004.

Includes bibliographical references

Analysis of mitochondrial DNA is used to demonstrate an apparent unidirectional fertilization between species, an apparent ancient hybridization, respiration rate and development rate differences between haplotypes, and variation within complete mitochondrial sequences. Apache trout, Oncorhynchus apache, by rainbow trout, O. mykiss, hybrids were shown to be fertile in both directions with variation in development rate present. Using time to hatch as a measure of development rate Apache trout female by rainbow trout male were shown to have a seven degree-day (°d) faster development rate compared to the reciprocal cross with crosses in both directions being viable. Apparent unidirectional hybridization observed in natural populations likely results from behavioral or temporal isolation. Hybridization between wild anadromous rainbow trout, steelhead, and westslope cutthroat trout, O. clarki lewisi, were observed in Tucannon River, Washington through mitochondrial DNA analysis. Species-specific nuclear DNA analysis showed no westslope cutthroat DNA present in any of 90 wild steelhead analyzed, while six steelhead contained mitochondrial DNA haplotypes of westslope cutthroat. Hybridization between species in the Tucannon River was likely the result of an ancient hybridization that occurred between 10,000 and 19,000 years before present. Significant differences in development rate and oxygen consumption were observed between nuclear identical female groups with different maternal backgrounds. Development rate means ranged from 317.97 to 335.25°d in progeny from different females. Oxygen consumption rates ranged from 3.31 to 9.66 μmol · g−1 wet weight · h −1. The two slowest developing groups had the highest oxygen consumption rates, indicating the possibility of mitochondrial/nuclear disassociation or functional differences between haplotypes. Development rate differences between second generation clonal females indicate mitochondrial haplotypes have a significant role on early development. These results indicate that selection for mitochondrial haplotypes could increase growth in aquaculture species. Analysis between the previously published rainbow trout sequence and three new haplotypes revealed a 13 base-pairs discrepancy. Thirty-one single base insertions/deletions were present between the new sequences and published sequence. Insertion/deletion sites were compared to a wide range of salmonid species with the new sequences corresponding to other species indicating errors have likely been incorporated into the previously published sequence.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9780496940776Subjects--Topical Terms:

530508
Genetics.
Subjects--Index Terms:

HybridizationIndex Terms--Genre/Form:

542853
Electronic books.

Genetic analysis of mitochondria in rainbow trout, Oncorhynchus mykiss.
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502 $a Thesis (Ph.D.)--Washington State University, 2004.
504 $a Includes bibliographical references
520 $a Analysis of mitochondrial DNA is used to demonstrate an apparent unidirectional fertilization between species, an apparent ancient hybridization, respiration rate and development rate differences between haplotypes, and variation within complete mitochondrial sequences. Apache trout, Oncorhynchus apache, by rainbow trout, O. mykiss, hybrids were shown to be fertile in both directions with variation in development rate present. Using time to hatch as a measure of development rate Apache trout female by rainbow trout male were shown to have a seven degree-day (°d) faster development rate compared to the reciprocal cross with crosses in both directions being viable. Apparent unidirectional hybridization observed in natural populations likely results from behavioral or temporal isolation. Hybridization between wild anadromous rainbow trout, steelhead, and westslope cutthroat trout, O. clarki lewisi, were observed in Tucannon River, Washington through mitochondrial DNA analysis. Species-specific nuclear DNA analysis showed no westslope cutthroat DNA present in any of 90 wild steelhead analyzed, while six steelhead contained mitochondrial DNA haplotypes of westslope cutthroat. Hybridization between species in the Tucannon River was likely the result of an ancient hybridization that occurred between 10,000 and 19,000 years before present. Significant differences in development rate and oxygen consumption were observed between nuclear identical female groups with different maternal backgrounds. Development rate means ranged from 317.97 to 335.25°d in progeny from different females. Oxygen consumption rates ranged from 3.31 to 9.66 μmol · g−1 wet weight · h −1. The two slowest developing groups had the highest oxygen consumption rates, indicating the possibility of mitochondrial/nuclear disassociation or functional differences between haplotypes. Development rate differences between second generation clonal females indicate mitochondrial haplotypes have a significant role on early development. These results indicate that selection for mitochondrial haplotypes could increase growth in aquaculture species. Analysis between the previously published rainbow trout sequence and three new haplotypes revealed a 13 base-pairs discrepancy. Thirty-one single base insertions/deletions were present between the new sequences and published sequence. Insertion/deletion sites were compared to a wide range of salmonid species with the new sequences corresponding to other species indicating errors have likely been incorporated into the previously published sequence.
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653 $a Mitochondria
653 $a Oncorhynchus mykiss
653 $a Rainbow trout
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