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© Research
Publication : TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik

Linkage mapping of Hsa-1(Og), a resistance gene of African rice to the cyst nematode, Heterodera sacchari

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik - 30 Apr 2003

Lorieux M, Reversat G, Garcia Diaz SX, Denance C, Jouvenet N, Orieux Y, Bourger N, Pando-Bahuon A, Ghesquière A

Link to Pubmed [PMID] – 12721640

Theor. Appl. Genet. 2003 Aug;107(4):691-6

Inheritance of resistance to cyst nematode (Heterodera sacchari) in Oryza sativa was investigated by inoculation tests with isolate 244 from Congo in segregating populations derived from hybridisation between O. sativa and its African sister cultivated species, O. glaberrima. We found that the resistance was controlled by one major gene, Hsa-1(Og), with codominance of susceptible and resistant alleles. To map Hsa-1(Og) on the rice genome, we pooled the data obtained from segregation of the resistance trait and microsatellite markers in three kinds of progeny: BC(1)F(3), BC(1)F(4), and pseudo-F(2) populations. Hsa-1(Og) was unambiguously located between Cornell University’s RM206 and RM254 markers on chromosome 11. Two additional microsatellite markers derived from Monsanto publicly available sequences were found to be tightly linked to the Hsa-1(Og) gene. It is possible that numerous plant resistances to a pathogen in fact exhibit a codominant inheritance, possibly explaining misleading conclusions in several reports on resistance segregation.

http://www.ncbi.nlm.nih.gov/pubmed/12721640