团头鲂(也称武昌鱼)自上世纪六十年代作为淡水养殖品种推广以来,以其抗病力强、生长快、食性杂等优势成为我国淡水养殖主要品种之一。但由于一些苗种繁育单位忽视团头鲂的种质保护、亲本选择和提纯复壮等选育工作,致使团头鲂养殖群体出现了退化现象。表现为生长缓慢、性成熟个? Since the promotion of the freshwater aquaculture species in the 1960s, the daucus (also known as the Wuchang fish) has become one of the major freshwater aquaculture species in China due to its strong disease resistance, fast growth and complex diet. However, due to the fact that some seed breeding units neglected the breeding of the bream, the selection of parents and the breeding and rejuvenation, etc., resulted in the degeneration of the breeding population. The performance of slow growth, sexual maturity?