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石远321是河北石家庄农科院与中科院遗传所协作,用陆地棉、海岛棉、野生瑟伯氏棉三个棉种进行远缘杂交,通过激素处理,杂种幼胚离体培养、染色体加倍使其恢复育性,再经回交转育,南繁北育、异地鉴定,历经过20个世代选育而成。 1993～1994年,在全国黄河流域棉花品种区域试验中,冀、鲁、皖、豫、晋、陕、苏等7省35点次,平均子棉、皮棉、霜前皮棉均居所有参试品种第一位,分别比全国抗病叫照品种中棉所12号增产12.6％、15.9％和19.7％。1995年在全国黄河流域棉花生产试验中,霜前皮棉每667平方米产益比对照中棉所12号增产26.5％。1994～1995年石远321同
Shiyuan 321 is a collaboration between Hebei Shijiazhuang Academy of Agricultural Sciences and the Institute of Genetics of Chinese Academy of Sciences. The distant hybridization is carried out by using three cotton varieties of G. hirsutum, G. island cotton and wild Cerberus japonicus. Through hormone treatment, hybrid embryos are cultured in vitro and chromosomes are doubled Its restoration of fertility, and then by the backcross transfer, South Fan North, off-site identification, after 20 generations of breeding. From 1993 to 1994, in the regional trials of cotton varieties in the Yellow River Basin in the country, 35 sub-provinces of Hebei, Shandong, Anhui, Henan, Shanxi, Shaanxi and Jiangsu provinces averaged lint, lint and frost lint in all the tested varieties The first one was 12.6%, 15.9% and 19.7% more than that of China’s cotton variety Cumzian No.12, which is called the national disease-resistant variety. In 1995, in the trial of cotton production in the Yellow River basin nationwide, the yield per 667m 2 of frost lint increased by 26.5% over that of CK20 on the 12th. Shiyuan 321 from 1994 to 1995