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‘定薯4号’是定西市农业科学研究院以‘定薯1号’为母本,‘陇薯5号’为父本,通过有性杂交系统选育而成,2016年通过甘肃省品种审定委员会审定。该品种为晚熟鲜薯食用及淀粉加工型品种,生育期114 d左右。薯块扁圆形,薯皮黄色略粗,薯肉黄色,芽眼少而浅呈浅红色。薯块干物质含量28.40%,淀粉含量20.22%,维生素C含量16.60 mg/100g,粗蛋白含量2.22%,还原糖含量0.18%。中抗晚疫病。干旱地产量在1 650 kg/667m2以上,适宜在甘肃省干旱、半干旱、二阴区及其他相似生态条件区域种植。
’Ding potato 4’ is the Dingxi City Academy of Agricultural Science ’fixed potato 1’ as the female parent, ’Long potato 5’ as the male parent, through the sexual hybridization system of breeding, in 2016 through the Gansu Province varieties Validation Committee validated. The varieties of late-cooked fresh-eatable and starch-processing varieties, the growth period of 114 d or so. Potato oblate, potato yellow slightly coarse, yellow flesh, buds light and light red. The dry matter content of tuber was 28.40%, the content of starch was 20.22%, the content of vitamin C was 16.60 mg / 100g, the content of crude protein was 2.22% and the content of reducing sugar was 0.18%. The resistance to late blight. The arid land yield above 1 650 kg / 667m2 is suitable for planting in arid, semi-arid, two-overcast and other similar ecological areas in Gansu Province.