Registration of GA 120R1B3 Germplasm Line of Cotton

Abstract

GA 120R1B3 (Reg. No. GP‐931, PI 660980) is a noncommercial breeding line of cotton (Gossypium hirsutum L.) jointly released by the USDA‐ARS and the Agricultural Experiment Station at the University of Georgia in 2010. GA 120R1B3 was created using a single‐seed descent method in a backcrossing program to combine the resistance to Meloidogyne incognita (southern root‐knot nematode) from M‐120 RNR with the high‐yielding, high fiber‐quality characteristics of PD 94042. Two greenhouse evaluations of nematode reproduction were conducted in 2007. Field evaluations for yield and fiber quality were conducted from 2007 to 2009 and included three tests in fields infested with M. incognita and four tests in fields without M. incognita. GA 120R1B3 has a high level of resistance to M. incognita that is equivalent to that found in M‐120 RNR, but GA 120R1B3 has significantly better lint percentage and fiber quality than M‐120 RNR. GA 120R1B3 has a yield and fiber quality generally comparable to commercial cultivars and a lint percentage that was often greater than that of the commercial standards. GA 120R1B3 had good yield and excellent fiber quality in both the presence and absence of M. incognita.