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通过分析P群种质选育的品种,结合育种实践,认为P群种质是不同于我国原有4大杂种优势类群的一个相对独立的新的优势群。总结出P群种质的主要杂种优势模式,即P群×Reid类群、P群×塘四平头类群、P群×旅大红骨类群和P群×其它种质类群。提出了P群种质在今后玉米育种和种质扩增中存在的问题和利用思路。
By analyzing the cultivars selected from P-type germplasm and combining with breeding practice, it is considered that P-type germplasm is a relatively independent new dominant group different from the original four major heterotic groups in China. The main heterosis patterns of P-type germplasm were concluded as P group × Reid group, P group × Tongsiping head group, P group × Ludahong osteopontin group and P group × other germplasm groups. Proposed the P group germplasm in future maize breeding and germplasm expansion in the existing problems and ideas.