最近几年,我国黄河流域棉区正在选育和推广棉花多系品种。去年,我去河南、河北考察棉花的良种繁育工作,又在中丹良种繁育培训班上同山东的学员进行了讨沦,发现不少同志对棉花多系品种缺乏了解,在繁育和推广工作中存在盲目性,这是一个应该引起重视的问题。多系品种是同一作物的不同品系按比例机械混合而成,通常又称为混合品种。对多系品种的研究,国外在30年代就开始了,最早是在抗病育种上,通过杂交和连续回文选择的方法,将抵抗不同 In recent years, China’s Yellow River cotton area is breeding and promotion of cotton multi-line varieties. Last year, I went to Henan and Hebei to study the breeding and breeding of cotton. In addition, I went on a seminar with trainees in Shandong and China on breeding and breeding classes in China and Denmark. I found that many comrades lacked a good understanding of the cotton variety. In the breeding and promotion work There is blindness, which is a problem that deserves our attention. Multi-line varieties of the same crop is different strains of different proportions of mechanical mixing, often also known as mixed varieties. Multi-line species research, foreign countries began in the 30s, the earliest is in disease-resistant breeding, through hybridization and continuous palindromic selection method will be different