Genetic base and coefficient of parentage of rice (Oryza sativa) varieties released in Kerala


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Authors

  • SHIVKUMAR SHIVKUMAR
  • L SUBBA RAO
  • T RAM
  • N D MAJUMDER
  • G PADMAVATHI
  • U PRASADA RAO
  • K KRISHNAIAH

Keywords:

coetlicient of parentage, geoetic base, Kerala, Oryza sativa

Abstract

An examination of the pedigrees of 29 rice (Oryza Sativa L.) varieties of hybrid origin, released in Kerala during'
1966-95, revealed a narrow genetic base, as only 37 ancestors were used directly or indirectly in their development
Out of 37 ancestors, 10 ancestors contributed 74.14% of the genetic base, Similarly. the cytoplasmic diversity was
also limited, as 41.38% varieties could be 'traced back maternally to the same ancestor 'Ptb 10' ('Thekkancheera') and'
thus probably carried its cYtoplasm, 'Dee Goo Woo Gen' (DGWG) was the most frequently appeared ancestor (96,55%)
due to its dwarling gene (sdl), All the ,29 varieties except 'Kayamkulam I' were interrelated with an average coefficient
of parentage of 0.137 for 406. combinations of 29 varieties.

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Author Biographies

  • SHIVKUMAR SHIVKUMAR
    Scientist (Senior Scale),Directorate of Rice Research, Rajendranagar, Hyderabad, Andhra Pradesh 500 030
  • L SUBBA RAO
    Scientist (Senior Scale),Directorate of Rice Research, Rajendranagar, Hyderabad, Andhra Pradesh 500 030
  • T RAM
    Scientist (Senior Scale),Directorate of Rice Research, Rajendranagar, Hyderabad, Andhra Pradesh 500 030
  • N D MAJUMDER
    Senior Scientist,
     Directorate of Rice Research, Rajendranagar, Hyderabad, Andhra Pradesh 500 030
  • G PADMAVATHI
    Scientist,Directorate of Rice Research, Rajendranagar, Hyderabad, Andhra Pradesh 500 030
  • U PRASADA RAO
    Head, Department of Plant Breeding,Directorate of Rice Research, Rajendranagar, Hyderabad, Andhra Pradesh 500 030
  • K KRISHNAIAH
    Project Director,Directorate of Rice Research, Rajendranagar, Hyderabad, Andhra Pradesh 500 030

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Issue

Vol. 68 No. 1 (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

SHIVKUMAR, S., RAO, L. S., RAM, T., MAJUMDER, N. D., PADMAVATHI, G., RAO, U. P., & KRISHNAIAH, K. (2013). Genetic base and coefficient of parentage of rice (Oryza sativa) varieties released in Kerala. The Indian Journal of Agricultural Sciences, 68(1). https://epubs.icar.org.in/index.php/IJAgS/article/view/27145