Potassium (K) effects and QTL mapping for K efficiency traits at seedling and adult stages in wheat
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Potassium (K) is one of the most important mineral nutrients limiting plant growth in agricultural systems. This study investigated the effects of low-K treatments and detected quantitative trait loci (QTLs) for K efficiency traits at the seedling and adult stages of wheat.
Eleven seedling traits under a hydroponic culture trial with five K treatments and nine adult traits in a pot trial and a field trial with three K treatments were investigated using a set of wheat recombinant inbred lines (RILs).
Values of most of the seedling and adult traits decreased with decreasing K supply, but the K-use efficiency and ratio of dry weight between seedling roots and shoots (RSDW) increased. A total of 87 QTLs for seedling traits in the hydroponic culture trial and 51 and 29 QTLs for adult traits in the pot and field trials, respectively, were detected. We also identified 15 relatively high-frequency QTLs (RHF-QTLs) which can be detected in over half of the treatments and 21 QTL clusters which is defined as the co-location of QTLs for more than two traits.
K efficiency traits and the related QTLs of wheat were greatly affected by K treatments. Several relatively stable QTLs and important QTL clusters may be potential targets for marker-assisted selection for wheat nutrient efficiency.
KeywordsCommon wheat Potassium (K) Quantitative trait locus (QTL) Recombinant inbred line (RIL)
This work was supported by the National Key Technologies R&D Program (Grant No. 2011BAD35B03), the National Natural Science Foundation of China (Grant No. 31201671) and the Natural Science Foundation of Shandong Province (Grant No. ZR2011CQ033).
- Barber SA (1995) Soil nutrient bioavailability: a mechanistic approach, 2nd edn. Wiley, New YorkGoogle Scholar
- FAOstat (2007) Food and Agriculture Organization of the United Nations. http://faostat.fao.org
- Fontaine JX, Ravel C, Pageau K, Heumez E, Dubois F, Hirel B, Le Gouis J (2009) A quantitative genetic study for elucidating the contribution of glutamine synthetase, glutamate dehydrogenase and other nitrogen-related physiological traits to the agronomic performance of common wheat. Theor Appl Genet 119:645–662PubMedCrossRefGoogle Scholar
- Hoagland DR, Arnon DI (1950) The water-culture method for growing plants without soil. Univ. of California. College of Agriculture. Agric. Experiment Station. Circular 347Google Scholar
- Quarrie SA, Steed A, Calestani C, Semikhodskii A, Lebreton C, Chinoy C, Steele N, Pljevljakusić D, Waterman E, Weyen J, Schondelmaier J, Habash DZ, Farmer P, Saker L, Clarkson DT, Abugalieva A, Yessimbekova M, Turuspekov Y, Abugalieva S, Tuberosa R, Sanguineti MC, Hollington PA, Aragués R, Royo A, Dodig D (2005) A high-density genetic map of hexaploid wheat (Triticum aestivum L) from the cross Chinese Spring × SQ1 and its use to compare QTLs for grain yield across a range of environments. Theor Appl Genet 110:865–880PubMedCrossRefGoogle Scholar
- Roshania G, Narayanasamyb G (2010) Effects of potassium on temporal growth of root and shoot of wheat and its uptake in different soils. Int J Plant Prod 4:25–32Google Scholar
- Wang S, Basten C, Zeng Z (2007) Windows QTL cartographer 2.5. Department of Statistics, North Carolina State University, RaleighGoogle Scholar
- Woodend J, Glass A, Person C (1987) Genetic variation in the uptake and utilization of potassium in wheat (Triticum aestivum L.) varieties grown under potassium stress. Dev Plant Soil Sci 27:383–391Google Scholar