Tapur, a new soybean cultivar for spring and summer early cropping in warm and humid region of north part of Iran

Tapour variety line (P-11 / 6-70036) was obtained from a cross between Sahar (Pershing) and K.W-505 in Mazandaran Agricultural Research Center in 1992. The study of F1 generation, segregating generations and the purification of crosses were performed during 1992-98. The pure lines were compared with Sari and Telar cultivars, in the preliminary comparison, biennial comparison, regional and national regional experiments during 1999-2000. The top lines were also compared with local control cultivars in on-farm trials. In total, the line P-11 / 6-70036 (Tapour variety) was superior to other cultivars with an average yield of 3749 kg per hectare. Other suitable traits of the new variety were: high height, suitable distance of the first pod from the ground, three-seed pods, medium five maturity group, semi determinate growth type, high weight of thousand seed, loading resistance, shattering resistance and tolerance to most important common diseases of soybean in the region, including charcoal rot.