Registration of CA 4009 and CA 4010 cotton germplasm lines

Abstract

AbstractRaw fiber properties are important in determining the value of cotton (Gossypium hirsutum L.). They determine the type and quality of cotton products that can be produced, making them important to textile processors and farmers, and are critical traits of interest for breeders. Improvement of fiber quality is an established objective for the Texas A&M AgriLife Research cotton breeding program in Lubbock, TX. CA 4009 (Reg. no. GP‐1086, PI 695389) and CA 4010 (Reg. no. GP‐1087, PI 695390) originated from crosses made in 2012. Three years of multilocation replicated performance testing were conducted. CA 4009 and CA 4010 produced longer fiber with higher length uniformity and elongation than all commercial cultivar checks, and fiber strength was greater than two checks. Yield was not significantly different from the checks for either line. CA 4009 and CA 4010 were evaluated in the 2018 Regional Breeders Testing Network (RBTN) field trials, and both lines maintained fiber quality across locations. Fiber length, length uniformity, and strength were higher than the checks. CA 4009 and CA 4010 had less short fiber content than all checks. The RBTN provides quality scores, and both CA 4009 and CA 4010 scored higher than all checks and other RBTN entries. These germplasm lines have a fiber quality package that may be valuable for improving multiple fiber properties that address market demands and textile industry requirements.