title: Genetic architecture of seed longevity in bread wheat (Triticum aestivum L.).
abstract: The deterioration in the quality of ex situ conserved seed over time reflects a combination of both physical and chemical changes. Intraspecific variation for longevity is, at least in part, under genetic control. Here, the grain of 183 bread wheat accessions maintained under low-temperature storage at the IPK-Gatersleben genebank over some decades have been tested for their viability, along with that of fresh grain subjected to two standard artificial ageing procedures. A phenotype-genotype association analysis, conducted to reveal the genetic basis of the observed variation between accessions, implicated many regions of the genome, underling the genetic complexity of the trait. Some, but not all, of these regions were associated with variation for both natural and experimental ageing, implying some non-congruency obtains between these two forms of testing for longevity. The genes underlying longevity appear to be independent of known genes determining dormancy and pre-harvest sprouting.
authors.affiliation: Leibniz Institute of Plant Genetics and Crop Plant Research, Gatersleben, Germany.
authors.forename: Mian Abdur Rehman
authors.initials: MA
authors.lastname: Arif
authors.forename: Manuela
authors.initials: M
authors.lastname: Nagel
authors.forename: Ulrike
authors.initials: U
authors.lastname: Lohwasser
authors.forename: Andreas
authors.initials: A
authors.lastname: Borner
mesh_terms: D000375:Aging / Q000235:genetics; D056726:Genetic Association Studies; D018525:Germination; D008136:Longevity / Q000235:genetics*; D010641:Phenotype; D057445:Plant Dormancy / Q000235:genetics; D010940:Plant Proteins / Q000235:genetics; D040641:Quantitative Trait Loci / Q000235:genetics*; D012639:Seeds / Q000235:genetics* / Q000254:growth & development; D014908:Triticum / Q000235:genetics* / Q000254:growth & development
chemical_list: D010940:Plant Proteins