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Theoretical and Applied Genetics

, Volume 53, Issue 3, pp 105–111 | Cite as

Genetic analysis of bacterial blight resistance in seventy-four cultivars of rice, Oryza sativa L.

  • G. S. Sidhu
  • G. S. Khush
  • T. W. Mew
Article

Summary

The genetics of resistance to bacterial blight, Xanthomonas oryzae (Uyeda and Ishiyama) Dowson, for 74 cultivars of rice, Oryza sativa L., was studied. The PX061 isolate of bacterial blight from the Philippines was used for inoculation of parental and hybrid populations. Single dominant genes at the Xa 4 locus convey resistance in 38 cultivars. Of these, 18 are resistant at all stages of plant growth and thus have the Xa 4aallele for resistance. However, 20 are susceptible up to maximum tillering stage but are resistant at booting and flowering stages. These cultivars have the Xa 4ballele for resistance. Thirty-two cultivars have single recessive genes for resistance which are allelic to xa 5.

The resistance in ‘DV85’, ‘DV86’ and ‘DZ78’ is conditioned by two genes. At maximum tillering stage xa 5 conveys resistance. However, at later growth stages an additional dominant gene, designated Xa 7 in ‘DZ78’, also gives resistance. The dominant genes of ‘DV85’ and ‘DV86’ are probably allelic to Xa 7. Xa 7 segregates independently of Xa 4, xa 5 and Xa 6, however like Xa 6, it conveys resistance at booting and post-booting stages only.

The resistance in ‘PI 231129’ is conditioned by a single recessive gene, designated xa 8. It also segregates independently of Xa 4, xa 5 and Xa 6.

Key words

Xanthomonas oryzae (Uyeda and Ishiyama) Dowson dominant gene recessive gene germ plasm bank allelic relationships 

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Literature

  1. Ezuka, A., Horino, O.; Toriyama, K.; Shinoda, H.; Morinaka, T.: Inheritance of resistance of rice variety Wase Aikoku 3 to Xanthomonas oryzae. Bul. Tokai-kinki Nat. Agric. Exp. Sta. 28, 124–130 (1975)Google Scholar
  2. International Rice Commission. Genetic symbols for rice recommended by the International Rice Commission. IRC Newsletter. 8, 1–16 (1959)Google Scholar
  3. Karganilla, A.; Natural, M.P.; Ou, S.H.: Comparative study on the different media for Xanthomonas oryzae. Philippine Agric. 57, 141–152 (1973)Google Scholar
  4. Kauffman, H.E.; Reddy, A.P.K.; Hsieh, S.P.Y.; Merca, S.D.: An improved technique for evaluating resistance of rice varieties to Xanthomonas oryzae. Plant Dis. Rep. 56, 537–541 (1973)Google Scholar
  5. Librojo, V.; Kauffman, H.E.; Khush, G.S.: Genetic analysis of bacterial blight resistance in four varieties of rice. Sabrao J. 8, 105–110 (1976)Google Scholar
  6. Olufowote, J.O.; Khush, G.S.; Kauffman, H.E.: Inheritance of bacterial blight resistance in rice. Phytopathology 67, 772–775 (1977)Google Scholar
  7. Petpisit, V.; Khush, G.S.; Kauffman, H.E.: Inheritance of resistance to bacterial blight in rice. Crop Sci. 17, 551–554 (1977)Google Scholar
  8. Sakaguchi, S.: Linkage studies on the resistance to bacterial leaf blight, Xanthomonas oryzae (Uyeda et Ishiyama) Dowson, in rice. Bul. Nat. Inst. Agric. Sci. Japan. Ser. D. 16, 1–18 (1967)Google Scholar
  9. Sidhu, G.S.; Khush, G.S.: Dominance reversal of a bacterial blight resistance gene in some rice varieties. Phytopathology 68, 461–463 (1978)Google Scholar

Copyright information

© Springer-Verlag 1978

Authors and Affiliations

  • G. S. Sidhu
    • 1
  • G. S. Khush
    • 1
  • T. W. Mew
    • 1
  1. 1.International Rice Research InstituteManilaPhilippines

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