STUDIES ON CHROMOSOME DOUBLING, TRANSPLANTING AND MANAGEMENT OF TUBE SHOOTS IN WHEAT Effects of daylength and temperature on the spike differentiation of winter wheat Spike Differentiation and Flowering Characteristics in Tall fescue Studies on Young Spike Differentiation of Wheat and Heterosis of Winter Hardinesss Low-temperature response and cold tolerance at spike differentiation stage of winter wheat varieties sowed in spring. Studies on the Dates of Various Phases of Spike Differentiation of Winter Wheat in Beijing Area Ecophysiological mechanism of photoperiod affecting phenological period and spike differentiation in oat (Avena nuda L.) Comparative study of spike differentiation in wheat in the glasshouse and field Effects of sowing times on the spike differentiation of different wheat varieties under the climate of warm winter