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一、引种及选种经过 1951年自华东农科所、江苏昆山稻作场及武大农学院引进华东与东北的粳稻品种共计749个,进行品种观察;52、53年继续选育;54年分别在武昌本所及湖南大通湖农场两处进行试验,均遭洪水淹没。55年又自东北、华北及华东重新征集808个品种,除重复的以外,实有品种656个,进行小区及大区观察,并对过去选出的良种,进行品种比较试验。56年继续进行选种,并将有希望的品种,在华
I. Introduction and Selection After a total of 749 japonica rice varieties from eastern China and northeast China were introduced from Huadong Agricultural Science Institute, Kunshan Paddy Field and Wu Agricultural College in 1951 for variety observation, 52 and 53 years of continuous breeding and 54 years respectively Experiments were conducted at two locations in Wuchang and Hunan Datong Lake Farm, both flooded. In the past 55 years, 808 varieties were re-collected from northeast, north China and east China. Except for duplicates, 656 actual varieties were obtained for community observation and large area inspection. Species comparison tests were conducted on selected elite varieties in the past. 56 years to continue the selection, and hopeful varieties in China