Location: Crop Genetics Research Unit
Title: Reniform nematode (Rotylenchulus reniformis) resistance locus from Gossypium aridum identified and introgressed into upland cotton (G. hirsutum) Authors
|Gutierrez, Osman -|
Submitted to: Journal of Nematology
Publication Type: Abstract Only
Publication Acceptance Date: July 13, 2009
Publication Date: December 1, 2009
Citation: Romano, G.B., Sacks, E.J., Stetina, S.R., Robinson, A.F., Fang, D.D., Gutierrez, O.A., Scheffler, J.A. 2009. Reniform nematode (Rotylenchulus reniformis) resistance locus from Gossypium aridum identified and introgressed into upland cotton (G. hirsutum). Journal of Nematology. 41(4):375-376. Technical Abstract: SSR markers associated with reniform nematode (Rotylenchulus reniformis) resistance were identified and mapped using progeny from a cross between a tri-species hybrid [Gossypium arboreum × (G 371 - G. hirsutum × G. aridum -)] and G. hirsutum MD51ne. The 50 most resistant and 26 most susceptible progeny were genotyped with 104 markers. Of these, 25 markers were associated with a resistance locus. Two markers, BNL 3279_132 and BNL 2662_090, were mapped within 1 cM of the locus. Results indicate that the resistance is simply inherited, possibly controlled by a single dominant gene. Because the SSR fragments associated with resistance were found in G. aridum and the progenitor G 371 (G. hirsutum × G. aridum), G. aridum is the likely source of this resistance. The availability of this source of resistance in a G. hirsutum background, along with related molecular markers, should facilitate development of cotton cultivars with a high level of resistance to reniform nematode.