Registration of Arkot 0219 and Arkot 0222 Germplasm Lines of Cotton

Abstract

Arkansas Agricultural Experiment Station has released two germplasm lines of Upland cotton, Gossypium hirsutum L., designated as Arkot 0219 (Reg. No. GP-972, PI 668533) and Arkot 0222 (Reg. No. GP-973, PI 668534). Both lines were derived from crosses with one common parent, Arkot 9111. The second parent for Arkot 0219 and Arkot 0222 was the advanced breeding lines DES 810 and STX8M007, respectively. Arkot 0222 is a sister line to ‘UA222’. Both Arkot 0219 and Arkot 0222 produced higher yields than ‘DP 393’ and ‘SG 105’ at each of four test sites in Arkansas. Their high yields were achieved by a favorable combination of basic yield components, which should provide high yield stability. Both lines displayed high resistance to bacterial blight and were similar to DP 393 in their response to other diseases. Arkot 0222 displayed resistance to tarnished plant bug equal to DP 393 and UA222 but higher than SG 105 or Arkot 0219. Fiber quality of Arkot 0219 is similar to SG 105 but inferior to DP 393 and UA222. Fiber quality of Arkot 0222 is similar to DP 393 but inferior to UA222. Both lines display high yielding ability, favorable yield components, specific host plant resistance traits, early maturity, and acceptable fiber quality.