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Research Detail

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

Nucleus seed is the core seed of any breeding program. To maintain purity production of nucleus seed of A, B and R lines are very vital. Nucleus stock is always the back up stock of breeder seed. Maintenance breeding of hybrid rice parental stock through nucleus seed production is the part and parcel of hybrid rice breeding. In this regard, crossing block is made with different sets and time of planting so as to make flowering synchronization.

  Nucleus seed, Crossing block, A, B , R lines
  BRRI HQ, Gazipur
  04-12-2007
  31-05-2008
  Variety and Species
  Rice

To initiate crossing program for nucleus seed production

CMS line (IR58025A) along with its maintainer (B line) and restorer (BRRI10R) was grown as parental materials. All three lines were sown in 3 different dates at 7 days intervals for better crossing and more F1 seeds. Thirty to thirty five days old seedlings were transplanted at a spacing of 20 cm x 15 cm in 5 m2 of plot. Fertilizers @ 270:130:120:70:10 kg/ha with urea-TSP-MP-Gypsum-Zinc sulphate were applied. Intercultural operations, rouging and supplementary pollination were performed.

  BRRI Annual Report 2007-2008
  
Funding Source:
1.  Government Budget:  20000/-
   20000/-

Seventy four (74) A x B and eighty six (86) A x R crosses were made and expected number of seeds was produced.

  Report/Proceedings
  

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