Plant Physiology Preview
Published on April 30, 2004; 10.1104/pp.103.036814
Received November 26, 2003
Returned for revision January 27, 2004
Accepted January 27, 2004
Analysis of Natural Allelic Variation of Arabidopsis Seed Germination and Seed Longevity Traits between the Accessions Landsberg erecta and Shakdara, Using a New Recombinant Inbred Line Population
Emile J.M. Clerkx , Mohamed E. El-Lithy , Elizabeth Vierling , Gerda J. Ruys , Hetty Blankestijn-De Vries , Steven P.C. Groot , Dick Vreugdenhil , and Maarten Koornneef *
Graduate School of Experimental Plant Science and Laboratory of Genetics (E.J.M.C., M.E.E.-L., G.J.R., H.B.-D.V., M.K.) and Laboratory of Plant Physiology (M.E.E.-L., D.V.), Wageningen University, NL-6703 BD Wageningen, The Netherlands; Department of Biochemistry and Molecular Biophysics, University of Arizona, Tucson, Arizona 85721 (E.V.); and Plant Research International, Wageningen-University and Research Center, NL-6700 AA Wageningen, The Netherlands (S.P.C.G.)
* Corresponding author; email: maarten.koornneef{at}wur.nl.
Quantitative trait loci (QTL) mapping was used to identify loci controlling various aspects of seed longevity during storage and germination. Similar locations for QTLs controlling different traits might be an indication for a common genetic control of such traits. For this analysis we used a new recombinant inbred line population derived from a cross between the accessions Landsberg erecta (Ler) and Shakdara (Sha). A set of 114 F9 recombinant inbred lines was genotyped with 65 polymerase chain reaction-based markers and the phenotypic marker erecta. The traits analyzed were dormancy, speed of germination, seed sugar content, seed germination after a controlled deterioration test, hydrogen peroxide (H2O2) treatment, and on abscisic acid. Furthermore, the effects of heat stress, salt (NaCl) stress, osmotic (mannitol) stress, and natural aging were analyzed. For all traits one or more QTLs were identified, with some QTLs for different traits colocating. The relevance of colocation for mechanisms underlying the various traits is discussed.
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