ORCID Profile
0000-0001-9373-2726
Current Organisation
University of Cambridge
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Publisher: Public Library of Science (PLoS)
Date: 20-09-2019
Publisher: Public Library of Science (PLoS)
Date: 24-08-2023
DOI: 10.1371/JOURNAL.PGEN.1010863
Abstract: Quantitative traits may be controlled by many loci, many alleles at each locus, and subject to genotype-by-environment interactions, making them difficult to map. One ex le of such a complex trait is shoot branching in the model plant Arabidopsis, and its plasticity in response to nitrate. Here, we use artificial selection under contrasting nitrate supplies to dissect the genetic architecture of this complex trait, where loci identified by association mapping failed to explain heritability estimates. We found a consistent response to selection for high branching, with correlated responses in other traits such as plasticity and flowering time. Genome-wide scans for selection and simulations suggest that at least tens of loci control this trait, with a distinct genetic architecture between low and high nitrate treatments. While signals of selection could be detected in the populations selected for high branching on low nitrate, there was very little overlap in the regions selected in three independent populations. Thus the regulatory network controlling shoot branching can be tuned in different ways to give similar phenotypes.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 17-11-2017
Abstract: In some snapdragons, a yellow spot in a field of magenta shows the bee the best place to go. Flowers of a related subspecies are mainly yellow with magenta veins marking the target. Bradley et al. analyzed a locus that regulates the pattern of color. The locus contains an inverted gene duplication that encodes small RNAs that repress pigment biosynthesis. Analysis of flowers derived from a region of the Pyrenees where the subspecies coexist indicates that natural selection is operating upon the locus. Science , this issue p. 925
Publisher: Proceedings of the National Academy of Sciences
Date: 08-10-2018
Abstract: Populations often show “islands of ergence” in the genome. Analysis of ergence between subspecies of Antirrhinum that differ in flower color patterns shows that sharp peaks in relative ergence occur at two causal loci. The island is shaped by a combination of gene flow and multiple selective sweeps, showing how ergence and barriers between populations can arise and be maintained.
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Hugo Tavares.