In 2008, biochemist Boris Arkadievich Malyarchuk (Russian: Борис Аркадьевич Малярчук) et al. of the Institute of Biological Problems of the North, Russian Academy of Sciences, Magadan, Russia, used a sample (n=279) of Czech individuals to determine the frequency of "Mongoloid" "mtDNA lineages". Malyarchuk found Czech mtDNA lineages were typical of "Slavic populations" with "1.8%" Mongoloid mtDNA lineage. Malyarchuk added that "Slavic populations" "almost always" contain Mongoloid mtDNA lineage. Malyarchuk said the Mongoloid component of Slavic people was partially added before the split of "Balto-Slavics" in 2,000–3,000 BC with additional Mongoloid mixture occurring among Slavics in the last 4,000 years. Malyarchuk said the "Russian population" was developed by the "assimilation of the indigenous pre-Slavic population of Eastern Europe by true Slavs" with additional "assimilation of Finno-Ugric populations" and "long-lasting" interactions with the populations of "Siberia" and "Central Asia". <answer>Malyarchuk said that other Slavs "Mongoloid component" was increased during the waves of migration from "steppe populations</answer> (Huns, Avars, Bulgars and Mongols)", especially the decay of the "Avar Khaganate".
Malyarchuk said the Mongoloid component of Slavic people was partially added before the split of "Balto-Slavics" in what time period?
Malyarchuk said that other Slavs "Mongoloid component" was increased during the waves of migration from "steppe populations