Project Summaries

12-189  Project Manager: D. C. Jones

GENETIC DISSECTION OF HETEROTIC EFFECTS IN UPLAND COTTON

Gerald O. Myers, LSU Agricultural Center

Heterosis (hybrid vigor) is a well-established and exploited phenomenon in many cross pollinated crops such as maize. Several previous studies have established that heterosis also exists in cotton, primarily for yield and yield components, yet little to no heterosis has been observed for fiber quality traits such as length, strength, uniformity, or micronaire. The amount of heterosis observed for yield in cotton can be significant and, if harnessed, could improve the profitability of cotton production. Traditional methods of identifying heterosis are labor intensive, involving the generation of a number of crosses and their evaluation. If molecular markers could be used to identify genomic regions responsible for yield heterotic effects, it would be easier to utilize them for exploiting hybrid vigor in cotton and to investigate the underlying causes. Using a collaborative approach the specific goals of this project are to: 1) genetically characterize yield heterotic effects in an elite Upland x elite Upland cross and 2) map QTL and QTL x E for yield heterosis in an elite Upland x elite Upland population.  During 2012 field evaluations for within boll yield components and fiber quality were conducted along with the initial development of a molecular linkage map based upon the two populations being utilized in this experiment.

 

Project Year: 2012
 

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