摘要： 选用具有丰富遗传基础的海、陆、野姊妹系杂交后代596为母本，早熟丰产品系79-366为父本，通过杂交输入远缘种质，改变遗传背景结合南繁加代，连年自交于1990年选育出了具有早熟、高产、稳产、优质、多抗（抗病、抗旱、抗棉铃虫、烂铃轻）易管理诸优良性状在较高的水平上协调统一融为一体的优系492，该系1992~1993年参加了河北省区域试验和省区试生产试验。霜前皮棉每hm²产量分别较对照中棉12号增产1.76%和1.09%均居首位，为我国第一个通过海、陆、野种间杂交育成的新品种。

关键词: 棉花, 育种, 远缘杂交品种, 多抗性, 丰产性, 纤维品质

Abstract: Using the hybridization progeny line 596 with rich genetic background of island cotton, upland cotton and wild species as female, early-maturity and high yield line 79-366 as male by the means of transfering in distant germplasm, modifying the genetic background, successive selfcrossing and speeding up generation, the new line 492 was obtained in 1990. The 492 is a high quality cotton line because many good characteristies, which include early-maturity, high and stable yield, high fibre quality, multiresistance(diease, drought, bollworn and boll-rotten resistance)and easy management. are co-ordinated at high level. In 1992-1993, in the Hebei Regional Tests and Regional Production Tests of cotton varieties, the lint yield of492 increased by 1.76% and 1.09% compared to that of Zhongmian 20 (ck) and ranked the top in yield among the tested lines. As the first variety bred through distant crossing among upland, island and wild cotton species.

Key words: Cotton, Breeding, Distant hybridization variety, Broad resistance, High yield, Fiber quality