种质杂交模式主要是美国的瑞德黄马牙、兰卡斯特分别和中国的唐山四平头、旅大红骨的杂交形式。
The models of the germplasm hybrid were mainly of Reid's Yellow Dent and Lancaster from U. S. crossed separately with Tangshan Sipingtou and Ludahonggu cultivars from China.
种质杂交模式主要是美国的瑞德黄马牙、兰卡斯特分别和中国的唐山四平头、旅大红骨的杂交形式。
The models of the germplasm hybrid were mainly of Reid's Yellow Dent and Lancaster from U. S. crossed separately with Tangshan Sipingtou and Ludahonggu cultivars from China.
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