Genetics of resistance to bacterial blight in rice (Oryza sativa L.)

Mir, G. N. ; Khush, G. S. (1991) Genetics of resistance to bacterial blight in rice (Oryza sativa L.) Indian Journal of Genetics and Plant Breeding, 51 (1). pp. 72-78. ISSN 0019-5200

Full text not available from this repository.

Official URL:


The mode of inheritance and allelic relationship among genes for resistanc to five different races of bacterial blight (Xanthomonas campestris pv oryzae) in three cultivars, resistant at all growth stages, was studied. The F1 and F2 progenies from crosses of the test cultivars with TN 1, when inoculated at seedling, maximum tillering and flowering stages, revealed that two recessive genes control resistance in them. Tests for allelism indicated that one of the genes is xa-5, which confers resistance to races I, II and III at the seedling stage. The other gene confers resistance at seedling stage to races IV and VI. This newly identified recessive gene segregates independently of Xa-3, Xa-4, Xa-7 and Xa-10 but is linked to xa-5 with the crossover value of about 9.68%. Thus the cultivars Long Grain, Kali Mekri 77-5, and Aus 295 have a second recessive gene besides xa-5, which may be allelic to xa-13.

Item Type:Article
Source:Copyright of this article belongs to Scientific Publishers.
Keywords:Xanthomonas campestris pv oryzae Race VI; Seedling Resistance; Allelic Relationship
ID Code:37835
Deposited On:23 Apr 2011 12:54
Last Modified:23 Apr 2011 12:54

Repository Staff Only: item control page