互作效应普遍存在，是烟草性状杂种优势表现的主要原因之一。
The epistatic effects could not be ignored in tobacco breeding. They were one of main causes of heterosis for most characters.
其集聚优势表现为区域静态效率的实现和动态进步能力的提高。
The agglomerative advantages of industrial clusters manifest realization of regional static efficiency and increase of dynamic progressive ability.
分析了杂交籼稻和杂交粳稻的优势表现和配合力成分，提出了加强杂交稻配合力选择的建议。
The performance, heterosis and combining ability components in hybrid rice are analyzed. Some Suggestions of strengthening the combining ability selection in hybrid rice are also proposed.
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