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Defense Responses of Cotton to Verticillium Wilt

Y. Bolek, C. W. Magill, P. M. Thaxton, K. M. El-Zik, and A. A. Bell


 
ABSTRACT

Verticillium wilt, caused by Verticillium dahliae, is one of the most important diseases of cotton and causes great economic losses. At least five V. dahliae strains were reported to attack Upland cotton cultivars; the most severe is the defoliating strain. Most studies indicate that resistance to the pathogen in Gossypium hirsutum is multigenetic and quantitatively inherited, and can be explained by additive and dominant gene effects. The interaction of Verticillium and several cotton species provides a suitable model system for investigating an important plant disease. An understanding of the genetic events at the molecular level in this disease interaction will increase our ability to utilize the resistance existing in some cotton germplasm to reduce these losses. The objectives of this study were to determine levels of resistance to four isolates of V. dahliae in four cultivars; develop interspecific populations for molecular studies to identify and map genes conferring resistance; and correlate resistance/susceptibility with known defense responses.



Reprinted from Proceedings of the 2000 Beltwide Cotton Conferences pp. 133 - 134
©National Cotton Council, Memphis TN

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Document last modified Saturday, Jun 17 2000