新棉二九一是我所于1971年以抗病品种陕棉四号为母本,丰产优质耐病品种刘庄一号为父本进行杂交选育而成。新棉二九一在我所五年八次试验,平均亩产皮棉178.2斤,比徐州142增产36.5％。在新乡地区棉花品种区试中,1978年十一点次平均亩产皮棉177.9斤,比徐州142增产20.7％。1979年十点次平均亩产皮棉 New cotton 291 is the result of hybrid breeding in 1971 using the resistant variety Shanmian No.4 as the female parent and the high yielding and quality resistant variety Liuzhuang I as the male parent. New cotton 291 in my five years eight trials, an average of 178.2 kg of mu per acre, an increase of 36.5% over Xuzhou 142. In Xinxiang area of ​​cotton varieties test, in 1978 eleven times the average per mu yield of lint 177.9 kg, 20.7% increase than Xuzhou 142. Ten o’clock in 1979 the average per capita production of lint