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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
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]

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.

Type
In Brief
Copyright
Copyright © NIAB 2007

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