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龙粳20系黑龙江省农科院水稻研究所以龙育98-211为母本,龙选9782为父本通过有性杂交选育而成。2007年1月通过黑龙江省农作物品种审定委员会审定,2010年被黑龙江省农业委员会确定为
Longjing 20 Department of Heilongjiang Academy of Agricultural Sciences Institute of Rice Longyu 98-211 as the female parent selected 9782 as the male parent selected by sexual cross breeding. January 2007 through the Heilongjiang Province Crop Variety Approval Committee validation, in 2010 by the Heilongjiang Provincial Committee of Agriculture identified as