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商丘52—7甘薯是河南商丘地区农科所以红旗4号为母本、19—5为父本进行有性杂交选育而成。经1993～1994年连续两年参加河南省区试和各地引种试验,1995年已进入生产示范阶段。我们鹤
Shangqiu 52-7 sweet potato is Shangqiu area of agriculture so red flag on the 4th as the female parent, 19-5 for male parental hybrid breeding. After 1993-1994 for two consecutive years to participate in the Henan provincial test and introduction test around the country, 1995 has entered the production demonstration stage. We crane