Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: March 17, 2010
Publication Date: September 1, 2010
Citation: Zeng, L., Meredith Jr, W.R., Campbell, B.T. 2010. Registration of four exotic germplasm lines derived from an introgressed population of cotton. Journal of Plant Registrations. 4:240-243. Interpretive Summary: High yield cotton cultivars, especially in the mid-south region, lack good fiber quality. It is imperative to improve fiber quality in cultivars while maintaining their lint yield. An exotic germplasm population derived from wide crosses was evaluated and four germplasm lines, JC14, JC32, JC60 and JC65, were selected. These germplasm lines were released to the public for their unique features in fiber quality and lint yield. JC14 and JC60 displayed exceptional fiber quality with moderate lint yield. JC32 and JC65 are desirable in both lint yield and fiber quality. The superior traits in these germplasm lines will provide cotton breeders opportunities to improve both lint yield and fiber quality in order to meet the demands in textile industry and export of raw fibers while maintaining profit for cotton growers.
Technical Abstract: John Cotton (JC) cotton germplasm was developed from multiple crosses between Gossypium hirsutum L. and G. barbadense L. JC14 (Reg. No. _________, PI _________), JC32 (Reg. No. _________, PI _________), JC60 (Reg. No. _________, PI _________), and JC65 (Reg. No. _________, PI _________) were released by the USDA-ARS in 2009 for their exceptional fiber quality or desirable combinations of lint yield and fiber properties. These lines were tested for agronomic performance and fiber quality in 2006, 2007 and 2008 at three locations. JC14 and JC60 averaged 277 and 281 kN m/kg, respectively, for bundle strength over three years compared with 258 kN m/kg for high quality check PHY72. The properties of 50% span length, short fiber content, and fineness in these two lines were also superior to those of PHY72. Lint yield of JC65 averaged 1190 kg/ha, compared with 1565 and 1090 kg/ha for DP555BR and PHY72, respectively. Elongation (8.06%), short fiber content (3.46%), and fineness (174 mg/km) in JC65 were all superior to those of PHY72. Lint percent of JC32 and JC65 was either similar or higher than that of PHY72. Seed weight of these two lines averaged 121 and 119 mg, respectively, compared with 105 mg of PHY72. Lint yield of JC32 averaged 1161 kg/ha with 8.21% elongation, 3.52% short fiber content, and 174 mg/km fineness. The superior traits in these lines can be incorporated into upland cotton cultivars for genetic improvement of both lint yield and fiber quality.