title: Chromosomal loci important for cotyledon opening under UV-B in Arabidopsis thaliana.
abstract: BACKGROUND
  Understanding of the genetic architecture of plant UV-B responses allows extensive targeted testing of candidate genes or regions, along with combinations of those genes, for placement in metabolic or signal transduction pathways.
  
  
  RESULTS
  Composite interval mapping and single-marker analysis methods were used to identify significant loci for cotyledon opening under UV-B in four sets of recombinant inbred lines. In addition, loci important for canalization (stability) of cotyledon opening were detected in two mapping populations. One candidate locus contained the gene HY5. Mutant analysis demonstrated that HY5 was required for UV-B-specific cotyledon opening.
  
  
  CONCLUSIONS
  Structured mapping populations provide key information on the degree of complexity in the genetic control of UV-B-induced cotyledon opening in Arabidopsis. The loci identified using quantitative trait analysis methods are useful for follow-up testing of candidate genes.
authors.affiliation: Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a Agricultura, Consejo Nacional de Investigaciones Científicas y Técnicas and Universidad de Buenos Aires, C1417 DSE Buenos Aires, Argentina.
authors.forename: Mariana
authors.initials: M
authors.lastname: Conte
authors.forename: Silvia
authors.initials: S
authors.lastname: de Simone
authors.forename: Susan J
authors.initials: SJ
authors.lastname: Simmons
authors.forename: Carlos L
authors.initials: CL
authors.lastname: Ballaré
authors.forename: Ann E
authors.initials: AE
authors.lastname: Stapleton
mesh_terms: D017360:Arabidopsis / Q000235:genetics* / Q000528:radiation effects; D029681:Arabidopsis Proteins / Q000235:genetics; D050976:Basic-Leucine Zipper Transcription Factors / Q000235:genetics; D002874:Chromosome Mapping; D032461:Chromosomes, Plant; D018548:Cotyledon / Q000235:genetics / Q000254:growth & development / Q000528:radiation effects*; D004843:Epistasis, Genetic; D005819:Genetic Markers; D009687:Nuclear Proteins / Q000235:genetics; D040641:Quantitative Trait Loci; D014466:Ultraviolet Rays
chemical_list: D029681:Arabidopsis Proteins; D050976:Basic-Leucine Zipper Transcription Factors; D005819:Genetic Markers; C109254:HY5 protein, Arabidopsis; D009687:Nuclear Proteins