Registration of MS‐01RKN, MS‐24RKN, MS‐30RKN, MS‐33RKN, MS‐35RKN, and MS‐37RKN Cotton Germplasm Lines with Resistance to Root‐Knot Nematode

Abstract

Journal of Plant Registrations, Vol. 1, No. 2, September 2007 147 The cotton (Gossypium hirsutum L.) germplasm lines MS-01RKN (Reg. No. GP-882, PI 644074), MS-24RKN (Reg. No. GP-883, PI 644075), MS-30RKN (Reg. No. GP-884, PI 644076), MS-33RKN (Reg. No. GP-885, PI 644077), MS-35RKN (Reg. No. GP-886, PI 644078), and MS-37RKN (Reg. No. GP-887, PI 644079) were developed by the Mississippi Agricultural and Forestry Experiment Station, the USDA-ARS, and Cotton Incorporated and were released in 2006. The lines combine resistance to the southern rootknot nematode (RKN), [Meloidogyne incognita (Kofoid & White) Chitwood] with good yield and fi ber quality. These germplasm lines provide both public and private breeders with germplasm resources with resistance to root-knot nematode and acceptable yield and fi ber quality for the Mid-South and southeastern USA. The nematode resistance in these lines is from the Auburn 634 RNR source (GP166), Shepherd, (1982). The nematoderesistant parent in all the crosses was M-240 RNR (PI592511) (Shepherd et al., 1996). M-240 RNR was developed with the cultivar Deltapine 61 as the recurrent parent. The nematoderesistant line M-240 RNR was crossed with ‘Suregrow 501’ (SG501), ‘Suregrow 125’ (SG125), and ‘DES119’. These F1s were then crossed with commercial cultivars or released elite breeding lines. R.G. Creech evaluated progeny of the three-way crosses in the greenhouse for resistance to root-knot nematode, using Registration of MS-01RKN, MS-24RKN, MS-30RKN, MS-33RKN, MS-35RKN, and MS-37RKN Cotton Germplasm Lines with Resistance to Root-Knot Nematode