Plant Breeding (2004) 123, 112-116

G.H. Jiang, C.G. Xu, J.M. Tu, X.H. Li, Y.Q. He and Q.F. Zhang (2004)
Pyramiding of insect- and disease-resistance genes into an elite indica, cytoplasm male sterile restorer line of rice, 'Minghui 63'
Plant Breeding 123 (2), 112-116
Abstract: The wild-rice-derived dominant gene Xa21 conferring multi-race resistance to bacterial blight and a fused Bt gene cry1Ab/cry1Ac conferring resistance to lepidopteran insects were individually introduced into the same genetic background of an elite indica cytoplasm male sterile (CMS) restorer line 'Minghui 63'. The line showed the desirable insect- and disease-resistant phenotypes. To maximize the effect, the two genes were also pyramided into the same recipient plant of 'Minghui 63' by marker-assisted selection. After being subjected to natural infestation of leaf-folders and yellow stem borers and inoculation of Xoo strain mixtures, the pyramiding line and its derived hybrids showed high levels of resistance against both insect damage and disease. Furthermore, data from field trials demonstrated that the hybrids made by crossing this pyramiding line with the CMS lines 'Zhenshan 97A' and 'Maxie A' retained a similar level of yield under conditions without chemical spray, indicating that the pyramiding genes have a yield-stabilizing effect on the recipient line and its hybrids.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Yuqing He

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host
Research topic(s) for beneficials or antagonists:
genetical engin./transgenic plants

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Xanthomonas oryzae	Rice (Oryza)
	Scirpophaga incertulas	Rice (Oryza)
Bacillus thuringiensis genes in crops (entomopathogen)
Bacillus thuringiensis Cry1A-toxin (entomopathogen)