Abstract
Introduction of stem-dwarfing genes had a major impact on wheat breeding and production. It is estimated that 70–90% of modern wheats carry one or more such genes. These genes were the cornerstone of the Green Revolution. They solved the lodging problem by reducing stem height, thus allowing a marked increase in mineral fertilizer use. These genes also changed biomass allocation and allowed more carbon assimilates to be stored as grain. With heavy fertilization and irrigation, plants had little use for an extensive and expensive root system for uptake of water and nutrients. However, with climate change and limited water and nutrient sources, there is a need to remodel crops with novel genetic variation available in landraces and old varieties. In this study, we evaluated nine accessions of wheat representing gene pools of parental, early-tall and late-semi-dwarf Green Revolution wheats for root and shoot biomass and grain yield under well-watered conditions in a glasshouse. Significant genotypic variation was found for total root biomass and root distribution in the soil profile as well as for plant height and days to anthesis. Modern wheats have reduced root-system size relative to their predecessors. This may be the effect of the dwarfing genes or an indirect effect of negative selection pressure, but the wheat root system became smaller within the last century.
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Bektas H, Hohn CE, Waines JG (2016) Root and shoot traits of bread wheat (Triticum aestivum L.) landraces and cultivars. Euphytica 212(2):297–311
Bektas H, Hohn CE, Waines JG (2017) Characteristics of the root system in the diploid genome donors of hexaploid wheat (Triticum aestivum L.). Genet Resour Crop Evol 64(7):1641–1650
Borlaug NE (1968) Wheat breeding and its impact on world food supply. In: Finlay KW, Shepherd KW (eds) Proceedings of the 3rd international wheat genetics symposium, pp 1–36. Australian Academy of Science, Butterworths
Borlaug NE (2007) Sixty-two years of fighting hunger: personal recollections. Euphytica 157:287–297. https://doi.org/10.1007/s10681-007-9480-9
Borojevic K, Borojevic K (2005) The transfer and history of “reduced height genes” (Rht) in wheat from Japan to Europe. J Hered 96:455–459. https://doi.org/10.1093/jhered/esi060
Bush MG, Evans LT (1988) Growth and development in tall and dwarf isogenic lines of spring wheat. Field Crop Res 18:243–270. https://doi.org/10.1016/0378-4290(88)90018-4
Ehdaie B, Waines JG (1994) Growth and transpiration efficiency of near-isogenic lines for height in spring wheat. Crop Sci 34:1443–1451
Ehdaie B, Waines JG (1996) Dwarfing genes, water use efficiency and agronomic performance of spring wheat. Can J Plant Sci 76:707–714
Ehdaie B, Waines J (2006) Determination of a chromosome segment influencing rooting ability in wheat-rye 1BS-1RS recombinant lines. J Genet Breed (Italy) 60:71–76
Ehdaie B, Waines JG, Hall AE (1988) Differential responses of landrace and improved spring wheat genotypes to stress environments. Crop Sci 28:838–842
Ehdaie B, Layne A, Waines JG (2012) Root system plasticity to drought influences grain yield in bread wheat. Euphytica 186:219–232. https://doi.org/10.1007/s10681-011-0585-9
Flintham JE, Börner A, Worland AJ, Gale MD (1997) Optimizing wheat grain yield: effects of Rht (gibberellin-insensitive) dwarfing genes. J Agric Sci 128:11–25. https://doi.org/10.1017/s0021859696003942
Gale MD, Youssefian S (1985) Dwarfing genes in wheat. Prog Plant Breed 1:1–35
GRIS (2014) Genetic resources information system for wheat and triticale. CIMMYT, N. I. Vavilov Research Institute of Plant Industry. http://wheatpedigree.net/. Accessed 1 Apr 2014
Hedden P (2003) The genes of the Green Revolution. Trends Genet 19:5–9. https://doi.org/10.1016/S0168-9525(02)00009-4
Hoagland DR, Arnon DI (1950) The water-culture method of growing plants without soil. University of California, College of Agriculture, Agricultural Experiment Station, Berkeley
Li AX, Yang WL, Lou XY, Liu DC, Sun JZ, Guo XL et al (2013) Novel natural allelic variations at the Rht-1 loci in wheat. J Integr Plant Biol 55:1026–1037. https://doi.org/10.1111/jipb.12103
Lupton FGH, Oliver RH, Ellis FB, Barnes BT, Howse KR, Welbank PJ et al (1974) Root and shoot growth of semi-dwarf and taller winter wheats. Ann Appl Biol 77:129–144. https://doi.org/10.1111/j.1744-7348.1974.tb06881.x
MacKey J (1973) The wheat root. In: Sears ER, Sears LMS (eds) Proceedings of the 4th international wheat genetics symposium, p 827–842, Columbia, Missouri
Miralles DJ, Slafer GA, Lynch V (1997) Rooting patterns in near-isogenic lines of spring wheat for dwarfism. Plant Soil 197:79–86. https://doi.org/10.1023/A:1004207407979
Muñoz-Romero V, Benítez-Vega J, López-Bellido L, López-Bellido RJ (2010) Monitoring wheat root development in a rainfed vertisol: tillage effect. Eur J Agron 33:182–187. https://doi.org/10.1016/j.eja.2010.05.004
Ninou EG, Mylonas IG, Tsivelikas A, Ralli P, Dordas C, Tokatlidis IS (2014) Wheat landraces are better qualified as potential gene pools at ultraspaced rather than densely grown conditions. Sci World J 2014:5. https://doi.org/10.1155/2014/957472
Pingali PL (2012) Green revolution: impacts, limits, and the path ahead. Proc Natl Acad Sci U. S. A. 109:12302–12308. https://doi.org/10.1073/pnas.0912953109
Qu YY, Mu P, Zhang HL, Chen CY, Gao YM et al (2008) Mapping QTLs of root morphological traits at different growth stages in rice. Genetica 133:187–200
Reynolds MP, Dreccer F, Trethowan R (2007) Drought-adaptive traits derived from wheat wild relatives and landraces. J Exp Bot 58:177–186. https://doi.org/10.1093/jxb/erl250
Richards R (1992) The effect of dwarfing genes in spring wheat in dry environments. I. Agronomic characteristics. Aust J Agric Res 43:517–527. https://doi.org/10.1071/AR9920517
Salvi S, Porfiri O, Ceccarelli S (2013) Nazareno Strampelli, the ‘Prophet’ of the Green Revolution. J Agric Sci 151:1–5
Sharma S, Xu SZ, Ehdaie B, Hoops A, Close TJ, Lukaszewski AJ et al (2011) Dissection of QTL effects for root traits using a chromosome arm-specific mapping population in bread wheat. Theor Appl Genet 122:759–769. https://doi.org/10.1007/s00122-010-1484-5
Siddique KHM, Belford RK, Tennant D (1990) Root: shoot ratios of old and modern, tall and semi-dwarf wheats in a Mediterranean environment. Plant Soil 121:89–98. https://doi.org/10.1007/BF00013101
Steel RGD, Torrie JH, Dickey DA (1997) Principles and procedures of statistics: a biometrical approach. McGraw-Hill, New York
Sukumaran S, Reynolds MP, Lopes MS, Crossa J (2015) Genome-wide association study for adaptation to agronomic plant density: a component of high yield potential in spring wheat. Crop Sci 55(6):2609–2619. https://doi.org/10.2135/cropsci2015.03.0139
Trethowan RM, Mujeeb-Kazi A (2008) Novel germplasm resources for improving environmental stress tolerance of hexaploid wheat. Crop Sci 48(4):1255–1265. https://doi.org/10.2135/cropsci2007.08.0477
Waines JG, Ehdaie B (2007) Domestication and crop physiology: roots of green-revolution wheat. Ann Bot 100:991–998. https://doi.org/10.1093/aob/mcm180
Wojciechowski T, Gooding MJ, Ramsay L, Gregory PJ (2009) The effects of dwarfing genes on seedling root growth of wheat. J Exp Bot 60(9):2565–2573. https://doi.org/10.1093/jxb/erp107
Worland AJ, Sayers EJ, Korzun V (2001) Allelic variation at the dwarfing gene Rht8 locus and its significance in international breeding programmes. Euphytica 119(1–2):157–161. https://doi.org/10.1023/A:1017582122775
Youssefian S, Kirby EJM, Gale MD (1992) Pleiotropic effects of the Ga-insensitive Rht dwarfing genes in wheat. 2. Effects on leaf, stem, ear and floret growth. Field Crop Res 28(3):191–210. https://doi.org/10.1016/0378-4290(92)90040-g
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This work was supported by University of California, Riverside, Botanic Gardens, The California Agricultural Experiment Station, and a doctoral fellowship from the Turkish Republic Ministry of National Education to Harun Bektas.
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We confirm that this work is original and has not been published elsewhere nor is it currently under consideration for publication elsewhere. Informed consent was obtained from all individual participants included in the study. The authors declare that they have no conflict of interest.
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Bektas, H., Waines, J.G. Root and shoot traits in parental, early and late generation Green Revolution wheats (Triticum spp.) under glasshouse conditions. Genet Resour Crop Evol 65, 2003–2012 (2018). https://doi.org/10.1007/s10722-018-0673-y
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DOI: https://doi.org/10.1007/s10722-018-0673-y