Tuesday, September 11, 2007

Marker assisted selection for resistance to the root-knot nematode in a cotton breeding program

Dr. Gerald O. Myers1, Dr. Huangjun Lu1, Mr. Tyson Phillips1, Dr. Patrick Colyer2, and Mr. William D. Caldwell2. (1) School of Plant, Environmental and Soil Sciences, 104 MB Sturgis Hall, LSU, Baton Rouge, LA 70803, (2) LSU AgCenter, Red River Research Station, P.O. Box 8550, Bossier City, LA 71113

The root-knot nematode (Meloidogyne incognita) is a serious pest of cotton. Traditional screening approaches applicable to the development of resistant varieties are time consuming, laborious and prone to environmental variability.  Recent research has identified molecular markers associated with the two genes governing resistance and offers the potential to increase screening efficiency. The present investigation focuses on the application of microsatellite markers to identify resistant segregating progeny in an applied Upland cotton (Gossypium hirsutum L.) improvement program.