@article{ingvarsson_nucleotide_2005,
	title = {Nucleotide polymorphism and linkage disequilbrium within and among natural populations of {European} {Aspen} ({Populus} tremula {L}., {Salicaceae})},
	volume = {169},
	issn = {0016-6731},
	doi = {10.1534/genetics.104.034959},
	abstract = {Populus is an important model organism in forest biology, but levels of nucleotide polymorphisms and linkage disequilibrium have never been investigated in natural populations. Here I present a study on levels of nucleotide polymorphism, haplotype structure, and population subdivision in five nuclear genes in the European aspen Populus tremula. Results show substantial levels of genetic variation. Levels of silent site polymorphisms, pi(s), averaged 0.016 across the five genes. Linkage disequilibrium was generally low, extending only a few hundred base pairs, suggesting that rates of recombination are high in this obligate outcrossing species. Significant genetic differentiation was found at all five genes, with an average estimate of F-ST = 0.116. Levels of polymorphism in P. tremula are 2- to 10-fold higher than those in other woody, long-lived perennial plants, such as Pinus and Cryptomeria. The high levels of nucleotide polymorphism and low linkage disequilibrium suggest that it may be possible to map functional variation to very fine scales in P. tremula using association-mapping approaches.},
	language = {English},
	number = {2},
	journal = {Genetics},
	author = {Ingvarsson, P. K.},
	month = feb,
	year = {2005},
	note = {Place: Bethesda
Publisher: Genetics Society America
WOS:000227697200037},
	keywords = {disequilibrium, dna   variation, genetic diversity, haplotype structure, locus, nuclear, patterns, recombination, sequence diversity, subdivision},
	pages = {945--953},
}

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Linkage disequilibrium was generally low, extending only a few hundred base pairs, suggesting that rates of recombination are high in this obligate outcrossing species. Significant genetic differentiation was found at all five genes, with an average estimate of F-ST = 0.116. Levels of polymorphism in P. tremula are 2- to 10-fold higher than those in other woody, long-lived perennial plants, such as Pinus and Cryptomeria. The high levels of nucleotide polymorphism and low linkage disequilibrium suggest that it may be possible to map functional variation to very fine scales in P. tremula using association-mapping approaches.","language":"English","number":"2","journal":"Genetics","author":[{"propositions":[],"lastnames":["Ingvarsson"],"firstnames":["P.","K."],"suffixes":[]}],"month":"February","year":"2005","note":"Place: Bethesda Publisher: Genetics Society America WOS:000227697200037","keywords":"disequilibrium, dna variation, genetic diversity, haplotype structure, locus, nuclear, patterns, recombination, sequence diversity, subdivision","pages":"945–953","bibtex":"@article{ingvarsson_nucleotide_2005,\n\ttitle = {Nucleotide polymorphism and linkage disequilbrium within and among natural populations of {European} {Aspen} ({Populus} tremula {L}., {Salicaceae})},\n\tvolume = {169},\n\tissn = {0016-6731},\n\tdoi = {10.1534/genetics.104.034959},\n\tabstract = {Populus is an important model organism in forest biology, but levels of nucleotide polymorphisms and linkage disequilibrium have never been investigated in natural populations. Here I present a study on levels of nucleotide polymorphism, haplotype structure, and population subdivision in five nuclear genes in the European aspen Populus tremula. Results show substantial levels of genetic variation. Levels of silent site polymorphisms, pi(s), averaged 0.016 across the five genes. Linkage disequilibrium was generally low, extending only a few hundred base pairs, suggesting that rates of recombination are high in this obligate outcrossing species. Significant genetic differentiation was found at all five genes, with an average estimate of F-ST = 0.116. Levels of polymorphism in P. tremula are 2- to 10-fold higher than those in other woody, long-lived perennial plants, such as Pinus and Cryptomeria. The high levels of nucleotide polymorphism and low linkage disequilibrium suggest that it may be possible to map functional variation to very fine scales in P. tremula using association-mapping approaches.},\n\tlanguage = {English},\n\tnumber = {2},\n\tjournal = {Genetics},\n\tauthor = {Ingvarsson, P. K.},\n\tmonth = feb,\n\tyear = {2005},\n\tnote = {Place: Bethesda\nPublisher: Genetics Society America\nWOS:000227697200037},\n\tkeywords = {disequilibrium, dna variation, genetic diversity, haplotype structure, locus, nuclear, patterns, recombination, sequence diversity, subdivision},\n\tpages = {945--953},\n}\n\n","author_short":["Ingvarsson, P. 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