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Development of a Package of 20 Varieties for Blast Management on Upland Rice

  • Suwarno
  • Erwina Lubis
  • Aris Hairmansis
  • Santoso

Abstract

Blast disease caused by Magnaporthe oryzae is the most important constraint to high yield of upland rice in Indonesia. The pathogen has diverse and dynamic races resulted in its capability to rapidly break down of the improved resistant varieties. Many improved varieties with blast resistance have been released in Indonesia, however, the resistance was broken down after three consecutive planting seasons. Genetic diversity of blast resistance could be the important factor that should be consider for durable field resistance and blast management. A package of 20 varieties of upland rice with diverse blast resistance has been developed. The varieties of the package were selected from advanced breeding lines developed in the national breeding program with the criteria of agronomical characters, grain quality, and diverse blast resistance. Selection for agronomic characters was conducted in Tamanbogo Research Station located in upland area with the criteria of better phenotypic acceptability and higher yield than the traditional check varieties. Selection for grain quality was done based on the grain quality data obtained from the Grain Quality Laboratory of Indonesian Center for Rice Research (ICRR). Selection for diverse blast resistance was conducted based on the diversity of the reaction patterns to 19 pathogen races artificially inoculated in the phytopathology laboratory. Based on the selection criteria, 20 lines were selected out of 500 with the following characteristics, diverse blast resistance, 75– 40 cm plant height, 104–120 days maturity, 7–14 tillers per hill, slender-medium grain shape, and 18.1–28.1% amylose content. The selected lines and some lines selected by farmers are now being evaluated at four locations of upland areas where 20 lines will be selected for the package.

Keywords

Upland rice Durable resistance Field selection Agronomic traits 

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Suwarno
    • 1
  • Erwina Lubis
  • Aris Hairmansis
  • Santoso
  1. 1.Indonesian Center for Rice Research (ICRR)MuaraIndonesia

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