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白菜型冬油菜优良品种延油２号由陕西省延安地区农科所洛川试验站于１９８６年通过甘蓝型与白菜型油菜种间远缘杂交选育而成。１９９４年引入天水市农科所，１９９５年参加品系鉴定试验，１９９６～１９９７年参加品种（系）比较和区域试验及生产示范。试验示范结果表明，...
Cabbage-type winter rapeseed varieties Yan 2 on the 2nd from Yan’an in Shaanxi Province Luochuan Experimental Station in 1986 by the cabbage and cabbage rapeseed interspecific hybridization. In 1994, it was introduced into the Agricultural Science Institute of Tianshui City. In 1995, it participated in the identification test of the strains. From 1996 to 1997, it participated in the comparison of varieties (lines) and regional experiments and production demonstration. Experimental demonstration results show that ...