Phosphorus uptake and utilization efficiency in response to potato genotype and phosphorus availability |
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| Affiliation: | 1. International Center for Agro-Informatics and Sustainable Development, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193 (China);2. Institute of Geography, University of Cologne, Koln 50923 (Germany);3. Precision Agriculture Center, Department of Soil, Water and Climate, University of Minnesota, St. Paul 55108 (USA);4. National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, Nanjing 210095 (China);5. Qixing Farm, Jiansanjiang, Jiamusi 156399 (China);1. Institute of Agricultural Sciences in the Tropics, Hohenheim University, Germany, Garbenstraße 13, 70593 Stuttgart, Germany;2. International Centre for Insect Physiology and Ecology, Kenya, P.O. Box 30772-00100, Nairobi, Kenya;3. Research institute of Organic Agriculture, Switzerland, Ackerstrasse 113, 5070 Frick, Switzerland;4. Kenya Agricultural and Livestock Research Organization – National Agricultural Research Laboratories, P.O. Box 14733-00800, Nairobi, Kenya;1. Québec Research and Development Centre, Agriculture and Agri-Food Canada, 2560 Hochelaga Boulevard, Quebec (QC), G1V 2J3, Canada;2. Québec Research and Development Centre, Agriculture and Agri-Food Canada, 1468, rue Saint-Cyrille, Normandin (QC), G8M 4K3, Canada;3. Université de Toulouse, INPT, INP-PURPAN, INRA, 31320, Castanet Tolosan, France;4. Green technology, Natural Resources Institute (Luke) Maaninka, Halolantie 31 A, FIN-71750 Maaninka, Finland;5. Agroscope, Institute for Plant Production Sciences IPS, CP 1012, CH-1260 Nyon, Switzerland;6. Charlottetown Research and Development Centre, Agriculture and Agri-Food Canada, 440 University Avenue, Charlottetown (PE), C1A 4N6, Canada;1. The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6001, Australia;2. School of Agriculture and Environment, The University of Western Australia, Perth, WA 6001, Australia;3. School of Biological Sciences, The University of Western Australia, Perth, WA 6001, Australia;1. Laboratory of Microbial Biotechnology, Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, Kazan, Republic of Tatarstan, Russia;2. Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Centre of Russian Academy of Sciences, Kazan, Russia;3. Tatar Research Institute of Agriculture, Kazan Scientific Center of Russian Academy of Sciences, Kazan, Russia;1. School of Agriculture and Environment and Institute of Agriculture, The University of Western Australia, 35 Stirling Hwy, Perth, WA, 6009, Australia;2. School of Biological Sciences, The University of Western Australia, 35 Stirling Hwy, Perth, WA, 6009, Australia |
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| Abstract: | Increased phosphorus (P) use efficiency (PUE) of potato production systems through P uptake and P utilization efficiency (PUPE and PUTE, respectively) is one of the main challenges for potato breeding and crop management programs. The aim of this study was to assess PUE, PUPE, PUTE and related traits in different potato genotypes (Solanum tuberosum L.) in response to P availability. Three field experiments were carried out in southern Chile in Andisol soils. In each experiment treatments were the factorial combination of (i) 22 genotypes of potatoes and (ii) two P fertilization rates (0 and 130 kg P ha−1, −P and +P, respectively). On average, biomass, P concentrations and P uptakes were reduced (P < 0.05) 32, 13 and 41% by −P, respectively. Conversely, −P increased PUTE (1.2-fold), PUPE (7-fold) and consequently PUE (8.3-fold). All traits were consistently affected (P < 0.01) by genotype (G), and the coefficient of variation (up to 47%) for each trait reflects the genotypic variability under both +P and −P. In all experiments, PUE and its main components were affected (P < 0.01) by P × G interaction. PUE was highly correlated with tuber yield, total biomass, P uptake and PUPE (P < 0.01; r = 0.74 − 0.99) but not to PUTE. In addition, PUPE was well correlated to yield and highly correlated with total P uptake (P < 0.01; r = 0.94–0.99). By contrast, PUTE was strongly negatively correlated (P < 0.01; r = −0.85 − 0.89) with P concentration in tubers. Genotypes from native (1 and 4), national cultivar (Puren-INIA, Yagana-INIA and Patagonia-INIA) and advanced line (R 89063 and RD 36–35) groups were among the best regarding PUE under −P. The PUPE was found to be more important than PUTE in determining PUE across a broad range of genotypes. Moreover, there is important genotypic variability in these traits with the potential to be used to improve PUE in potato crops through breeding and crop management programs. |
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| Keywords: | Tuber yield Phosphorus acquisition Internal phosphorus requirement Phosphorus use efficiency Harvest |
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