Tuesday, September 11, 2007 - 1:15 PM

The Evaluation of High Tannin Cotton Lines for Resistance to Rhizoctonia solani and Pythium aphanidermatum

Mr. Ray Kennett1, Dr. C. Wayne Smith1, Dr. Steve Hague1, and Dr. Peggy Thaxton2. (1) Texas A&M University, 2474 TAMU, College Station, TX 77843, (2) Delta Research and Extension Center, PO Box 197, Stoneville, MS 38776

Resistance within a set of high tannin cotton, Gossypium hirsutum, germplasm lines to two seedling disease pathogens, Rhizoctonia solani and Pythium aphanidermatum, was examined to determine their usefulness in a breeding program.  These lines were released by C.W. Smith, M.F. Schuster, and G.A. Niles from the Texas Agricultural Experiment Station in 1989, and contain elevated levels of condensed tannin. Data suggest that there is variation in response to pythium and  rhizoctonia among and within these high tannin lines but Tamcot Sphinx was as resistant as the best high tannin line. Selection for resistant plants following 3x application of pathogen will be discussed. There was not an association of pythium susceptibility and tannin concentration. 


See more of Plant Breeding and Genetics--Poster Session
See more of Plant Breeding and Genetics

See more of The World Cotton Research Conference-4 (September 10-14, 2007)