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Identification of new sources of bacterial blight (Xanthomonas oryzae pv. oryzae) resistance in wild Oryza species and O. glaberrima

Published online by Cambridge University Press:  01 August 2007

Yogesh Vikal ,
Aparna Das ,
B. Patra ,
R. K. Goel ,
J. S. Sidhu  and
Kuldeep Singh
Yogesh Vikal
Affiliation:
Department of Plant Breeding, Genetics and Biotechnology, Punjab Agricultural University, Ludhiana-141004, India
Aparna Das
Affiliation:
Department of Plant Breeding, Genetics and Biotechnology, Punjab Agricultural University, Ludhiana-141004, India
B. Patra
Affiliation:
Central Rice Research Institute, Cuttack, India
R. K. Goel
Affiliation:
Department of Plant Breeding, Genetics and Biotechnology, Punjab Agricultural University, Ludhiana-141004, India
J. S. Sidhu
Affiliation:
Department of Plant Breeding, Genetics and Biotechnology, Punjab Agricultural University, Ludhiana-141004, India
Kuldeep Singh*
Affiliation:
Department of Plant Breeding, Genetics and Biotechnology, Punjab Agricultural University, Ludhiana-141004, India
*
*Corresponding author. E-mail: [email protected]
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Abstract

Bacterial blight (BB) of rice is a widespread disease in tropical Asia, contained largely through the deployment of race-specific resistance genes. Although more than 25 BB resistance genes have been identified, none are effective individually against all the pathotypes prevalent in north-western India. The response of a set of 327 accessions of 13 wild Oryza species and cultivated African rice, O. glaberrima, was evaluated to infection with seven pathotypes of Xanthomonas oryzae pv. oryzae over a period of 3–4 years. Of these, 67 were resistant or moderately resistant to all pathotypes. These comprised 13 accessions of O. glaberrima, 5 of O. barthii, 10 of O. rufipogon, 4 of O. longistaminata, 22 of O. nivara, 6 of O. officinalis, 2 of O. rhizomatis and 5 of O. minuta. Inheritance studies, molecular mapping and transfer of some of these genes into O. sativa ssp. indica are in progress.

Keywords

bacterial blightOryza glaberrimaOryza speciesXanthomonas oryzae pv. oryzae
Type
In Brief
Information
Plant Genetic Resources , Volume 5 , Issue 2 , August 2007 , pp. 108 - 112
Copyright
Copyright © NIAB 2007

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