川杂4号系四川省农业科学院棉花研究所用核雄性不育两用系473A中的不育株为母本,与抗病品种川73—27作恢复系父本杂交组配的我国第一个棉花核雄性不育系抗病杂交种。该品种较好地结合了抗病、丰产、优 Sichuan hybrid 4 Department of Cotton Research Institute of Sichuan Academy of Agricultural Sciences, male sterile dual-use male sterile line 473A as the female parent, and the resistant variety Chuan 73-27 for the restorer line of the male parent hybrid with the first Cotton nuclear male sterile lines resistant hybrids. The variety of a better combination of disease resistance, high yield, excellent