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Response of different species of Brassica to water deficit | ||
International Journal of Plant Production | ||
مقاله 2، دوره 11، شماره 1، فروردین 2017، صفحه 1-16 اصل مقاله (716.67 K) | ||
نوع مقاله: Research Paper | ||
شناسه دیجیتال (DOI): 10.22069/ijpp.2017.3306 | ||
نویسندگان | ||
F. Rashidi1؛ mohammad mahdi majidi* 2؛ M. Pirboveiry3 | ||
1MSc of Plant Breeding, Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-8311, Iran. | ||
2Isfahan University of Technology | ||
3MSc student of Plant Breeding, Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-8311, Iran. | ||
چکیده | ||
Development of drought-tolerant cultivars is hampered by a lack of effective selection criteria. In this research, response of 36 genotypes of rapeseed from seven species of Brassica including B. napus, B. rapa, B. juncea, B. carinata, B. oleracea, B. nigra and B. fruticulosa was assessed under three moisture levels (no stress, mild stress and intense stress) in the field during 2011-2012. Five drought-tolerance indices were calculated: stress tolerance (TOL), stress susceptibility index (SSI), mean productivity (MP), geometric mean productivity (GMP) and stress tolerance index (STI). Increasing water stress levels caused significantly more reductions in the seed yield of all species. Species B. napus had the highest yields in normal and intense stress conditions while B. carinata showed better performance in mild stress condition. Correlation coefficients revealed that among drought tolerance indices, GMP, STI and MP are superior criteria for selecting high-yield genotypes under stress and non-stress conditions. B. napus and B. carinata were the most drought tolerant while B. rapa and B. oleracea were the most susceptible species of Brassica based on yield potential. Application of principle component analysis (PCA) for distinguishing drought and susceptible species are discussed. | ||
کلیدواژهها | ||
Brassica؛ soil moisture؛ Drought tolerance؛ principle component analysis | ||
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