BC2F1 generation with Striga resistance QTL | Crop Management (Crop Varieties)
Description of the technology or innovation
This technology was developed by introgressing Striga resistanceQuantitative Trait Loci (QTL) from N13 line into an adapted sorghum varietyIS8193 using marker assisted backcrossing. Five Striga resistance QTLs weretargeted. The introgression was performed using Simple Sequence Repeats (SSRs)molecular markers. The BC2F1 generation carrying Striga resistance QTLs wasexpected to undergo further genotyping, backcrossing and selfing in order toproduce farmer preferred sorghum lines resistant to Striga for adoption inRwanda and other countries in the ECA region. The technology was developed atthe University of Nairobi and at ILRI BecA laboratory.
Assessment/reflection on utilization, dissemination & scaling out or up approaches used
The ultimate beneficiaries of the technology are breeders who willuse it to carry out further backcrosses to adequately recover IS8193 backgroundand farmers who are expected to use released materials. The technology wasvalidated by genotyping to confirm introgression of the QTL in a heterozygousstate. This needed further validation through genotyping to confirm fixed QTLas well as phenotyping of the trait.
Current situation and future scaling up
The technology will be disseminated to farmers through farmergroups. Information about the technology will be disseminated to farmersthrough various platforms and information networks. Farmers will be trainedthrough TOTs on use of the technology to support future scaling.
Economic Considerations
The technology will be instrumental in preventing losses caused byStriga, and increasing sorghum yields, thereby contributing to improved foodsecurity and household incomes of adopting farmers.
Gender considerations
The technology is considered gendersensitive. However, the women are more likely to benefit than men since they contributemost of the family labor that goes into crop production activities especiallyweeding.
Contact details
Theogene Niyibigira;
Scientist, Rwanda Agricultural Board (RAB);
P. O. Box BP 5016;
47 Rue Kamuzinzi;
Kigali, Rwanda.
Tel: 250-578768 /250-0830 4197
Fax: 250-578768
Eliud K. Ngugi;
Scientist, University of Nairobi (UON);
P.O. Box 29053;
Nairobi, Kenya.
Email: Kahiu.ngugi@yahoo.com
Eunice Mutitu;
Professor, University of Nairobi (UON);
P. O. Box 29053;
Nairobi, Kenya.
Santiede Villiers;
Scientist; International Crops Research Institute for theSemi-Arid Tropics (ICRISAT);
P. O. Box 30709-00100;
Nairobi, Kenya.
Email: s.devilliers@cgiar.org
Dan Kiambi;
Scientist, African Biodiversity Conservation & InnovationCentre (ABCIC);
P.O. Box 100882-00101;
Nairobi, Kenya.
Tel: +254-20-2330014
Mob: +254-722926086
Additional information
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Glossary
Haussmann, B.I.G., Hess, D.E., Koyama, M.L., Grivet L., Rattude,H.F.W. and Geiger, H.H., 2000a. Breeding for Striga resistance in cereals.MargrafVerlag, Weikersheim, Germany.
Haussmann, B.I.G., Hess, D.E., Geiger, H.H. and Welz, H.G., 2000b. Improved methodologies for breeding Striga-resistant sorghums. (ReviewArticle). Field Crops Research. 66, 195-201.
UNDP, 2010. Millennium Development Goals Progress Report. RwandaCountry Report. 2010.