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Taking advantage of segregation distortion to increase variability in breeding

Taking advantage of segregation distortion to increase variability in breeding . DR. Paul Njiruh Nthakanio Dr. James I. Kanya Dr. John M. Kimani Dr. Raphael Wanjogu FUNDED / COLLABORATORS NATIONAL IRRIGATION BOARB , EUC, UoN , KARI. 1.1 Background : Rice production in Kenya .

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Taking advantage of segregation distortion to increase variability in breeding

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  1. Taking advantage of segregation distortion to increase variability in breeding DR. Paul NjiruhNthakanio Dr. James I. Kanya Dr. John M. Kimani Dr. Raphael Wanjogu FUNDED / COLLABORATORS NATIONAL IRRIGATION BOARB , EUC, UoN, KARI

  2. 1.1 Background : Rice production in Kenya. • Over 300tonnes of rice is consumed in Kenya. • About 100tones is locally produced. • In Kenya rice is mainly grown in Mwea, Ahero, Bunyala, West Kano, Yala Swamp (MoA, 2011) • About 98% of Mwea rice is Basmati. • By year 2030 Kenya population is expected to be 60.0million. • Rice yield is expected to increase 600% to feed the population

  3. 1.2 Response to National challenges In 2013 conference we were challenged to; • Breed for lines that yield higher under local conditions ii) Have a realistic response to climate change

  4. Facts on Basmati • In favour • Aroma • Good cooking qualities • Relative early maturing (85days to heading) • Relative resistant to blast (compared to other lines)

  5. Weakness of Basmati • Tall and weak stem – it cannot take a lot of Nitrogen which responsible for yield increase • Lodging • Low tillering ability • Conserved variety

  6. Discovery • Cross between Basmati and V1,V2 and V3 Lead to segregation distortion at F2 generation (Njiruh et al. 2013) • F2 deviate from Mendelia laws of segregation • Using Science to make product: this know was used to develop varied recombinant inbreed lies (numerous in numbers)

  7. 2. Objective • Use segregation distortions to increase variation in recombinant inbred lines • Select lines superior than Basmati but with acceptable breeding and cooking traits

  8. Results or Outputs

  9. New lines

  10. Achievement's • High tillering ability • Dwarf- it can take more nitrogenous fertilizer • Early maturity

  11. Acknowledgement • National irrigation Board • Embu University College • University of Nairobi • Kenya Agricultural Research Institute

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