Differentiation of the high molecular weight glutenin subunit D
t
x
2.1 of Aegilops tauschii indicated by partial sequences of its encoding gene and SSR markers |
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| Authors: | C M Lu W Y Yang B R Lu |
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| Institution: | (1) Graduate School Experimental Plant Sciences, Laboratory of Plant Breeding, Department of Plant Sciences, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands;(2) Turfgrass & Environment Research Institute, Samsung Everland Inc., 435–737 Gunpo, Kyungki, Korea |
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| Abstract: | The devastating late blight pathogen Phytophthora infestans infects foliage as well as tubers of potato. To date, resistance breeding has often focused on foliage blight resistance, but tuber blight resistance is becoming more and more important in cultivated potatoes. In this study, a reliable tuber assay for resistance assessment was developed and foliage and tuber blight resistance (R) was compared in four mapping populations. In the RH4X-103 population, tuber blight resistance inherited independently from foliage blight resistance. Three specific R genes against P. infestans were segregating. The Rpi-abpt and R3a genes function as foliage-specific R genes, whereas the R1 gene acts on both foliage and tuber. In the segregating populations SHRH and RH94-076, tuber and foliage blight resistance correlated significantly, which suggests that resistance in foliage and tuber is conferred by the same gene (could be R3b) and quantitative trait loci (QTL), respectively. In the CE population neither tuber nor foliage resistance was observed. |
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| Keywords: | allelic diversity late blight Phytophthora infestans race-specific resistance tuber resistance |
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