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一、高产性选择与杂种优势综合品种是目前牧草杂种优势利用的主要方式。以日本猫尾草育种为例,为了育成早熟、高产、再生能力强、多叶、抗斑点病和黑锈病的品种,以从国内外收集的66份遗传资源的8800个体组成育种原始群体。首先对与育种目标有密切关系的成熟期等性状进行表型选择,然后对入选的624个体进行无
First, the choice of high yield and heterosis Variety is the main advantage of the utilization of forage hybrids. Taking the breeding of Timothy japonica as an example, in order to breed precocious, high yield, strong regenerative ability, multi-lobe, anti-spot disease and black rust, 8800 individuals from 66 genetic resources collected at home and abroad were used to breed the original population. First, phenotypic selection was performed on traits such as maturity which are closely related to breeding objectives, and then 624 individuals selected