【摘要】 玉米育种的基本前提是拥有丰富的遗传资源。若对大量的种质资源分别进行鉴定、改良和利用,是一项十分困难的工作,常因人力或财力限制而力不从心。为此,有必要建立杂种优势模式,把育种材料作适当的分群。综述了玉米杂种优势类群划分的方法及杂种优势模式,以期为玉米育种研究提供科学依据。更多还原

【Abstract】 The basic premise of maize breeding is to have abundant genetic resources,but identification,improvement and use of a large number of germplasm resources is a very difficult task because of human labor power limits or financial constraints.Therefore,it is necessary to establish heterotic patterns and make the appropriate classification of the breeding materials.The method of maize heterosis group and heterotic patterns were summarized,so as to provide science basis for maize breeding.更多还原