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Registration of TAM RKRNR-9 and TAM RKRNR-12 Germplasm Lines of Upland Cotton Resistant to Reniform and Root-Knot Nematodes

Starr, J. L., Smith, C. W., Ripple, K., Zhou, E., Nichols, R. L., Faske, T. R.
Journal of plant registrations 2011 v.5 no.3 pp. 393-396
Gossypium hirsutum, Meloidogyne incognita, Rotylenchulus reniformis, breeding lines, cotton, crop production, cultivars, germplasm, parasitism, pathogens, reproduction, root-knot nematodes, Alabama, Louisiana, Mississippi, Texas
TAM RKRNR-9 (Reg. No. GP-941; PI 662039) and TAM RKRNR-12 (Reg. No. CP-942; PI 662040) with resistance to the reniform (Linford & Oliveira) and root-knot [ (Kofoid & White) Chitwood] nematodes are noncommercial breeding lines of upland cotton (L.) released by Texas AgriLife Research in 2010. Both lines were derived from the cross of the root-knot nematode resistant line M-315 RNR (L.), and the reniform nematode resistant line Tx110 (L.). The resistance to reniform is moderate, suppressing nematode reproduction by 40–70%. The resistance to root-knot nematodes is high, similar to that of the M-315 RNR parent, with more than 90% suppression of reproduction and low amounts of root galling. This unique combination of resistance to the reniform and root-knot nematodes makes these breeding lines valuable for cotton-breeding programs.