THE INFLUENCE OF PREAMURYE WEATHER CONDITIONS UPON THE LEVEL OF SOYA CROSS-POLLINATION

Abstract

The paper presents the data of research in the influence of weather conditions upon the level of cross-pollination in Glycine (L.) Merr. × Glycine ussuriensis and Glycine (L.) Merr. × Glycine (L.) Merr. when naturally hybridized under the conditions of Amur region southern zone. Cultivated soya crop varieties, such as Volzhana, Luch Nadezhdy and Rosinka, served as a maternal form. A fraternal form was presented by the fodder variety Gribskaya Kormovaya regionalized in Amur region and the forms of wild-growing soya of zeisky population (КЗ-671, КЗ-6332, КЗ-6337, КЗ-1236). As a result of three-year investigations, it was revealed that the level of soya re-pollination varies with combinations and hybridization from 0.37 to 4.82 % in intraspecies hybridization and from 0.05 to 3.97 % in interspecies hybridization. The highest re-pollination level was marked under the conditions of the year 2007 that was characterized by hot weather (on average, air temperature was by 1.9-2.2 ºС higher than the multiyear temperature) and a great amount of rainfalls (higher than the norm by 33 and 71 mm in May and June, respectively). The great amount of rainfalls before soya anthesis and deficient moisture during the anthesis are established to encourage the improved level of soya cross-pollination in Preamurye.