A Russian painter and graphic artist. Born in Irkutsk. The daughter of the governor of Irkutsk and Yenisei provinces I. Pedashenko. She was married to the artist O. Tretyakov, who belonged to the dynasty of famous collectors and patrons. From 1887 till 1896 she studied at St. Petersburg Academy of Arts. In 1891 and 1893 she was awarded silver medals. In 1896 won the title of the artist. She participated in the Spring exhibitions in the halls of the Academy of Arts. In 1899 she organized a large art exhibition in Tomsk, which was based on the collections of local collectors and artists. She exhibited 13 paintings and several sketches at the exhibition. During 1901 - 1910 she collaborated with various publications. Member and exhibitor of the Union of Siberian Traveling Art Exhibitions (1903) and the Association of Artists of Revolutionary Russia (1926). Author of landscapes and genre works devoted to Siberian motifs. Her works are kept in the museums and private collections of Russia.