就地留种防止马铃薯的退化甘肃省平凉农业学校张颖珍近几年来，甘肃省马铃薯通过引种和杂交育种，推广了大批的新品种。它们的共同特点是：丰产性较好、抗晚疫病，容易退化，适应性较差，品质不如当地老品种。在马铃薯育种方面依旧存在一个最突出的问题就是马铃薯的退化问... In-situ seed to prevent the degradation of potatoes Pingliang Agricultural School in Gansu Province Zhang Yingzhen In recent years, Gansu Province, potato introduction and cross breeding, to promote a large number of new varieties. Their common features are: good yield, resistance to late blight, easy to degenerate, poor adaptability, quality is inferior to the local old varieties. One of the most prominent problems in potato breeding is the degradation of potatoes ...