Use of asymmetric somatic hybridization for transfer of the bacterial blight resistance trait from Oryza meyeriana L. to O. sativa L. ssp. japonica |
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Authors: | C.-Q. Yan K.-X. Qian Q.-S. Yan X.-Q. Zhang G.-P. Xue W.-G. Huangfu Y.-F. Wu Y.-Z. Zhao Z.-Y. Xue J. Huang G.-Z. Xu P. Wu |
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Affiliation: | (1) State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 310029 Hangzhou, China;(2) China National Rice Research Institute, 310006 Hangzhou, China;(3) Ningbo Academy of Agricultural Sciences, 315040 Ningbo, China;(4) CSIRO Plant Industry, 306 Carmody Rd., St Lucia, 4067 Brisbane, Qld, Australia |
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Abstract: | Bacterial blight is one of the major diseases affecting rice productivity. To improve the resistance of cultivated rice to bacterial blight, we introduced a bacterial blight resistance trait from Oryza meyeriana, a wild rice species, into an elite japonica rice cultivar (Dalixiang) using asymmetric somatic hybridization. One hundred and thirty-two independent lines were regenerated. The hybrid plants possessed several morphological features of the donor species, O. meyeriana. Random amplified polymorphic DNA analysis revealed that hybrid plants exhibited banding patterns derived from their parental genotypes. For the majority of the hybrids, resistance to bacterial blight pathogens was intermediate to that observed for O. meyeriana and O. sativa (cv. Dalixiang). Four of the hybrid lines exhibited a high bacterial blight resistance, but it was less than that observed for O. meyeriana. These results demonstrate that O. meyeriana can be used as a good genetic source for improving bacterial blight resistance in commercial rice cultivars through asymmetric somatic hybridization.Abbreviations 2,4-D: 2,4-Dichlorophenoxyacetic acid - IOA: Iodoacetamide - NAA: -Naphthaleneacetic acid - PEG: Polyethylene glycol Communicated by P. Lakshmanan |
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Keywords: | Oryza sativa Oryza meyeriana Asymmetric somatic hybridization Bacterial blight resistance |
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