Abstract
AbstractCA 4011 (Reg. no. GP‐1149, PI 705597) is a noncommercial breeding line of cotton (Gossypium hirsutum L.) jointly released by Texas A&M AgriLife Research and the Agricultural Experiment Station at the University of Georgia‐Tifton. This cotton germplasm is a selection from CA 3084, a germplasm line released by Texas Agricultural Experiment Station in 1987. CA 3084 was derived from a cross of EPSM‐75‐AAAA‐3 and EPSM‐1224‐1‐74‐2‐4‐2‐1, historical breeding lines developed by the cotton breeding program at Texas Agricultural Experiment Station in El Paso. Progeny row of CA 4011 was selected for 2008 preliminary yield testing in Southern High Plains by the Texas A&M AgriLife Research cotton breeding program in Lubbock. In 2012, CA 4011 had less damage from thrips feeding injury than 22 other genotypes tested in a greenhouse assay but was equal to the resistant check TX110 (PI 163608). Performance testing for yield, fiber quality, and other related agronomic properties was conducted under organic management and on certified organic farms during 2012, 2013, and 2014 growing seasons. CA 4011 showed comparable yield and fiber quality to standard check cultivars grown in the Southern High Plains. Subsequent testing was done at the University of Georgia Coastal Plains Experiment Station in Tifton, GA, to evaluate for resistance to the foliar diseases areolate mildew and target spot. Disease ratings were taken in 2018 and 2019 growing seasons. CA 4011 showed favorable resistance to areolate mildew in comparison to susceptible checks, providing less leaf infection and defoliation.
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