Varietal screening and inheritance of resistance to brown spot disease in rice (Oryza sativa)


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Authors

  • K PRASAD
  • V D SHUKLA
  • P K SINHA

Keywords:

rice, diseases, screening, inheritance, brown spot, Oryza sativa, Cochilobolus miyabeanus

Abstract

A study was conducted to identify the new resistant varieties of diverse origin and inheritance of genes controlling
brown spot disease. Rice (Oryza sativa L.) varieties (560) from diverse sources were screened during wet seasons of
1990 and 1991 for brown spot (Cochilobolus miyabeanus Ito & Kuribayashi) disease in the field under natural infection
where high disease pressure was created by cultural operations. Twenty-two varieties were identified to be resistant
to this disease. The inheritance of resistance was studied during 1992-94 in 6 crosses involving 3 resistant parents
and 1 susceptible parent. It was found that resistance to brown spot disease was controlled by 2 pairs of recessive
genes. The 3 resistant parents 'RR 35-4-1','RR 20-5' and 'RR 36-141 ' had single recessive gene in each. Gene present
in 'RR 20-5' and 'RR 36-141' was the same whereas gene present in 'RR 35-4-1' was different from other 2 resistant
parents.

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Author Biographies

  • K PRASAD
    Principal Scientist (plant Breeding), Central Rainfed Upland Rice Research Station, Central Rice Research Institute, Hazaribag, Bihar 825 301
  • V D SHUKLA
    Senior Scientist (plant Pathology), Central Rainfed Upland Rice Research Station, Central Rice Research Institute, Hazaribag, Bihar 825 301
  • P K SINHA
    Senior Scientist (Plant Breeding),  Central Rainfed Upland Rice Research Station, Central Rice Research Institute, Hazaribag, Bihar 825 301

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Issue

Vol. 68 No. 5 (1998)

Section

Articles

License

The copyright of the articles published in The Indian Journal of Agricultural Sciences is vested with the Indian Council of Agricultural Research, which reserves the right to enter into any agreement with any organization in India or abroad, for reprography, photocopying, storage and dissemination of information. The Council has no objection to using the material, provided the information is not being utilized for commercial purposes and wherever the information is being used, proper credit is given to ICAR.

How to Cite

PRASAD, K., SHUKLA, V. D., & SINHA, P. K. (2013). Varietal screening and inheritance of resistance to brown spot disease in rice (Oryza sativa). The Indian Journal of Agricultural Sciences, 68(5). https://epubs.icar.org.in/index.php/IJAgS/article/view/27497