Nucleotide diversity at two phytochrome loci along a latitudinal cline in Pinus sylvestris. García-Gil, M. R., Mikkonen, M., & Savolainen, O. Molecular Ecology, 12(5):1195–1206, 2003. _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-294X.2003.01826.x![Nucleotide diversity at two phytochrome loci along a latitudinal cline in Pinus sylvestris [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Forest tree species provide many examples of well-studied adaptive differentiation, where the search for the underlying genes might be possible. In earlier studies and in our common conditions in a greenhouse, northern populations set bud earlier than southern ones. A difference in latitude of origin of one degree corresponded to a change of 1.4 days in number of days to terminal bud set of seedlings. Earlier physiological and ecological genetics work in conifers and other plants have suggested that such variation could be governed by phytochromes. Nucleotide variation was examined at two phytochrome loci (PHYP and PHYO, homologues of the Arabidopsis thaliana PHYB and PHYA, respectively) in three populations: northern Finland, southern Finland and northern Spain. In our samples of 12–15 sequences (2980 and 1156 base pairs at the two loci) we found very low nonsynonymous variation; π was 0.0003 and 0.0002 at PHYP and PHYO loci, respectively. There was no functional differentiation between populations at the photosensory domains of either locus. The overall silent variation was also low, only 0.0024 for the PHYP locus. The low estimates of silent variation are consistent with the estimated low synonymous substitution rates between Pinus sylvestris and Picea abies at the PHYO locus. Despite the low level of nucleotide variation, haplotypic diversity was relatively high (0.42 and 0.41 for fragments of 1156 nucleotides) at the two loci.
@article{garcia-gil_nucleotide_2003,
title = {Nucleotide diversity at two phytochrome loci along a latitudinal cline in {Pinus} sylvestris},
volume = {12},
issn = {1365-294X},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1046/j.1365-294X.2003.01826.x},
doi = {10.1046/j.1365-294X.2003.01826.x},
abstract = {Forest tree species provide many examples of well-studied adaptive differentiation, where the search for the underlying genes might be possible. In earlier studies and in our common conditions in a greenhouse, northern populations set bud earlier than southern ones. A difference in latitude of origin of one degree corresponded to a change of 1.4 days in number of days to terminal bud set of seedlings. Earlier physiological and ecological genetics work in conifers and other plants have suggested that such variation could be governed by phytochromes. Nucleotide variation was examined at two phytochrome loci (PHYP and PHYO, homologues of the Arabidopsis thaliana PHYB and PHYA, respectively) in three populations: northern Finland, southern Finland and northern Spain. In our samples of 12–15 sequences (2980 and 1156 base pairs at the two loci) we found very low nonsynonymous variation; π was 0.0003 and 0.0002 at PHYP and PHYO loci, respectively. There was no functional differentiation between populations at the photosensory domains of either locus. The overall silent variation was also low, only 0.0024 for the PHYP locus. The low estimates of silent variation are consistent with the estimated low synonymous substitution rates between Pinus sylvestris and Picea abies at the PHYO locus. Despite the low level of nucleotide variation, haplotypic diversity was relatively high (0.42 and 0.41 for fragments of 1156 nucleotides) at the two loci.},
language = {en},
number = {5},
urldate = {2024-10-02},
journal = {Molecular Ecology},
author = {García-Gil, M. R. and Mikkonen, M. and Savolainen, O.},
year = {2003},
note = {\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-294X.2003.01826.x},
keywords = {Pinus sylvestris, bud set date, latitudinal cline, nucleotide diversity, photoperiod, phytochrome},
pages = {1195--1206},
}
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Earlier physiological and ecological genetics work in conifers and other plants have suggested that such variation could be governed by phytochromes. Nucleotide variation was examined at two phytochrome loci (PHYP and PHYO, homologues of the Arabidopsis thaliana PHYB and PHYA, respectively) in three populations: northern Finland, southern Finland and northern Spain. In our samples of 12–15 sequences (2980 and 1156 base pairs at the two loci) we found very low nonsynonymous variation; π was 0.0003 and 0.0002 at PHYP and PHYO loci, respectively. There was no functional differentiation between populations at the photosensory domains of either locus. The overall silent variation was also low, only 0.0024 for the PHYP locus. The low estimates of silent variation are consistent with the estimated low synonymous substitution rates between Pinus sylvestris and Picea abies at the PHYO locus. 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