Unwanted morphological traits of soybean flower in breeding of obligatory self-pollinated soybean varieties

Soybean is considered an obligate autogamous species with cleistogamous flowers. But numerous facts of cross-pollination make it possible to doubt the obligatory cleistogamy of its flowers. Crosspollination in soybeans is an undesirable sign due to the risk of reducing the genetic purity of cultivars. Therefore, the study of the causes and factors of crosspollination is relevant. When studying the intraspecific variability of the elements of the soybean flower, morphological features of the structure of the corolla petals were revealed, increasing the likelihood of chasmogamy and the frequency of cross-pollination. It has been established that soybean autogamy in soybean can be provided not only by self-pollination in the budding phase, but also by the full tightness of the pair of keel petals, which protect the stigma of the pistil from visiting by insect pollinators. The most reliable isolation of androecium and gynoecium from the external environment is determined by the complete closure of the boat's petals and their linear dimensions exceeding the size of the ovary and stamen tube...