Search Results
Abstract
In a factorial experiment each of 4 red raspberry cultivars was treated with each of 4 viruses. Embryo sacs were examined in treated and control flowers collected at anthesis and 4 days later. A numerical index was devised to quantify stages of embryo sac development, and thus facilitate statistical analysis. Effects on embryo sac development of cultivar differences, viruses, and year difference were observed. The virus effects on embryo sac development as such were not considered severe enough to account for failure of fruit-set or yield reduction. Embryo sacs of the ‘Sumner’ cultivar were retarded in development compared to the other cultivars.