VIEW ARTICLE

Heterozygosity in Inheritance of Verticillium Wilt Tolerance in Cotton. Jerry R. Barrow, Research Geneticist, Crops Research Division, Agricultural Research Service, U.S.D.A., Las Cruces, New Mexico 88001. Phytopathology 60:301-303. Accepted for publication 11 September 1969. DOI: 10.1094/Phyto-60-301.

F₁ responses of two cotton strains (Gossypium hirsutum) Acala 9519 and Acala 1479, tolerant to Verticillium wilt, when crossed with Acala 227, a susceptible strain, differed from each other and with respect to the individual tolerant parent plant used. This varied response was attributed to heterozygosity of the tolerant parent plants. The requirements for starting genetic analysis of Verticillium wilt tolerance are discussed. Tolerance to the mild SS-4 isolate of Verticillium albo-atrum acted as a dominant character(s) in F₁ plants of the A9519 × A227 and A1479 × A227 crosses.