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https://hdl.handle.net/2440/34572
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Type: | Journal article |
Title: | Genetic mapping of natural variation in potassium concentrations in shoots of Arabidopsis thaliana |
Author: | Harada, H. Leigh, R. |
Citation: | Journal of Experimental Botany, 2006; 57(4):953-960 |
Publisher: | Oxford Univ Press |
Issue Date: | 2006 |
ISSN: | 0022-0957 1460-2431 |
Statement of Responsibility: | Hisatomi Harada and Roger A. Leigh |
Abstract: | Naturally-occurring variation in K+ concentrations between plant genotypes is potentially exploitable in a number of ways, including altering the relationship between K+ accumulation and growth, enhancing salinity resistance, or improving forage quality. However, achieving these requires greater insight into the genetic basis of the variation in tissue K+ concentrations. To this end, K+ concentrations were measured in the shoots of 70 Arabidopsis thaliana accessions and a Cape Verdi Island/Landsberg erecta recombinant inbred line (RIL) population. The shoot K+ concentrations expressed on the basis of fresh matter (KFM) or dry matter (KDM) were both broadly and normally distributed as was the shoot dry matter content per unit fresh weight (DMC). Using the data from the RILs, four quantitative trait loci (QTL) were identified for KFM and three for KDM. These were located on chromosomes 2, 3, 4, and 5. Two of the QTLs for KFM overlapped with those for KDM. None of these QTLs overlapped with those for fresh weight or dry weight, but the QTL for KDM located on chromosome 3 overlapped with one for DMC. In silico analysis was used to identify known or putative K+ and cation transporter genes whose loci overlapped with the QTLs. In most cases, multiple genes were identified and the possible role of their gene products in determining shoot K+ concentrations is discussed. |
Keywords: | Accession Arabidopsis mapping naturally-occurring variation potassium quantitative trait loci |
DOI: | 10.1093/jxb/erj081 |
Published version: | http://jxb.oxfordjournals.org/cgi/content/abstract/57/4/953 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 6 |
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