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Research Detail

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Dr. Md. Jamil hasan
Principal Scientific Officer
Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

Umma Kulsum
Scientific Officer
Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

Conversion of suspected CMS lines into new CMS lines is done in back cross nursery. New CMS lines are developed in this nursery in the back ground of elite maintainer lines. Up to BC6 generations conversion are made if the suspected CMS line expressed complete sterility as well as possess good agronomic features. It is then shifted to CMS maintenance and evaluation nursery as new CMS lines.Nine (9) BC6 generations were designated as new CMS lines and included into CMS maintenance & evaluation nursery. BC4, BC2 generations were stable for pollen sterility and advanced for next generation. Only completely sterile plants were selected for generation advancement.

  Back cross, CMS and Maintainer lines
  BRRI HQ, Gazipur
  07-07-2008
  31-10-2008
  Variety and Species
  Rice
  • Developing CMS lines from identified maintainer by back crossing.

Successive backcross progenies ranging from BC1-BC6 were grown along with their corresponding suspected maintainer lines. Pollen fertility of each of the plant in a line was evaluated. Completely sterile plants were immediately crossed with its corresponding male parents and the BC-generation was advanced. Adequate soil fertility was ensured by applying additional quantities of Urea- TSP-MP- Gypsum- ZnSO4 @ 150:100:70:60:10 kg/ha, respectively. Total TSP, MP, Gypsum and ZnSO4 were applied in final land preparation. Total Urea was applied in four installments, 1/4 th at final land preparation, 1/4 th at 15-20 days after transplanting (DAT), 1/4 th at  35-40 DAT and the rest before panicle initiation stage.Irrigation and weeding was done when necessary

  BRRI Annual Report 2008-2009, page no. 8 & 9, BRRI, Gazipur-1701, Bangladesh
  
Funding Source:
1.  Government Budget:  30000/-
   30000/-

Nine (9) BC6 generations were designated as new CMS lines and included into CMS maintenance & evaluation nursery. BC4, BC2 generations were stable for pollen sterility and advanced for next generation. Only completely sterile plants were selected for generation advancement. BC1 generation was shown fertility problem and decided not to make generation advancement.

  Report/Proceedings
  

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