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没有优良的种质基础，就不可能培育出高配合力的优良自交系。本文对美国和中国的玉米种质资源进行了分析，归纳总结出两国主要玉米种质类群及其所属的部分优良自交系。为有目的的引进和改良国内外玉米种质，快速有效地按杂化模式组配杂交组合提供参考。1美国玉米种质资源分析1
Without good germplasm base, it is impossible to cultivate good inbred lines with high combining ability. In this paper, the maize germplasm resources in the United States and China are analyzed, and the main maize germplasms and some fine inbred lines belonging to them are summarized. For the purpose of the introduction and improvement of maize germplasm at home and abroad, quickly and effectively according to hybrid model group with hybrid combinations provide a reference. 1 American maize germplasm resources analysis 1