Evolution of Insect Pest and Disease Resistant, High-Yielding and Improved Quality Varieties of Cotton by Use of Ionizing Radiation. Part of a Coordinated Programme on the Use of Induced Mutations for Disease Resistance in Crop Pl

摘要

Disease resistant, high yielding and higher quality cotton varieties were developed. 42 interspecific hybrid progenies of earlier crosses between Gossypium barbadense and Gossypium tomentosum or Gossypium barbadense and Gossypium hirsutum were included. Out of these, 22 progenies in F sub 3 generation were irradiated by gamma radiation doses of 20 and 25 kR. A list is given of interspecific hybrid progenies, as are the lists of boll rot susceptible and resistant plants in the irradiated and non-irradiated populations and/or successful crosses made between 1977 and 1978. (Atomindex citation 14:742013)