Submitted to: Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 5/9/2006
Publication Date: 11/14/2006
Citation: Hinze, L.L., Kohel, R.J. 2006. Evaluation of four cotton germplasm pools for fiber and yield characteristics [abstract]. Agronomy Society of America, November 12-16, 2006, Indianapolis, Indiana. Paper No. 162-6.
Technical Abstract: A diversity of cotton (Gossypium hirsutum L.) germplasm exists with various characteristics useful for cotton improvement. This study was conducted to determine whether four cotton germplasm pools could be developed to provide adapted germplasm resources for cotton breeders. The properties of dwarfing genes, race stocks, fiber quality, and glandless genes were evaluated by creating a germplasm pool for each characteristic. A narrow based (four parent) germplasm pool was assembled for the dwarfing genes, and three broad based (22 to 42 parent) germplasm pools were assembled for the remaining three. These four germplasm pools were evaluated on yield and fiber traits and compared to a cotton genetic standard, TM-1. The dwarf germplasm pool had an earlier maturity, and was significantly lower yielding (1,396 g) when compared with an average of the three remaining pools (1,762 g) and with the TM-1 control (1,661 g). There were no significant differences in yield among the race, fiber, and glandless pools. Fiber properties were significantly lower in the dwarf pool (micronaire = 3.41; 50% fiber length = 0.536) than the averages for the race, fiber, and glandless pools (micronaire = 4.15; 50% fiber length = 0.563). Again, there were no significant differences in micronaire or 50% fiber length amoung the race, fiber, and glandless germplasm pools. The TM-1 control had an average micronaire value (3.90) and a significantly higher 50% fiber length (0.610) when compared to the germplasm pools. The race, fiber, and glandless germplasm pools show potential for improving cotton germplasm by increasing yield and/or improving fiber properties.