张家口地区坝下农业科学研究所,进行谷子杂种优势的利用研究,在两系制种方面取得显著成绩,推广杂交谷子,获得大面积丰产,和当地主栽品种比较,增产可达30％,为旱地农业生产作出了贡献。两系制种法是利用谷子高度雄性不育系和幼苗具有显性性状标志的谷子品种进行大田制种,每年制出的杂种一代谷种,直接用于生产。现已有蒜系28×张农10号、黄系4 Zhangjiakou area under the Institute of Agricultural Sciences, the study of utilization of millet hybrids, made significant achievements in two lines of seed production, popularize hybrid millet, access to large-scale high yield, and the local cultivars, increased production up to 30% for Dry land has contributed to agricultural production. Two lines of seed production method is the use of millet high degree of male sterile lines and seedlings with dominant traits of millet varieties of field seed, the annual generation of hybrid generation of cereal, directly used in the production. Garlic is now available 28 × Zhang Nong 10, yellow line 4