摘 要：
近年来,我国棉花育种工作取得了很大的成就,如徐州1818、徐州142、鲁棉一号、洞庭一号等自育品种产量均高于引进品种,但有些品种在纤维品质尤其是纤维强度方而尚有差距,不能完全满足纺纱要求。因此,我们从1973年起开展了以改进陆地棉纤维强度为重点的品质育种工作。关于提高陆地棉纤维强度的育种,国外已进行了数十年,主要有两种途径:一是与野生
译 名：
GENETIC ADVANCES IN THE PROGENIES OF CROSSESBETWEEN G.HIRSUTUM AND G.BARBADENSE
作 者：
Ma Fan-zhi Liu Ji-sheng
摘 要：
Several crosses were made between varieties of G.hirsutum and G.barbadense in order to improve the fiber strength of upland var- ieties.Jin-Mian-2,Jin-71-22,stoneville 2B and Xu-zhou-287 were used as the femate parents and Losaia-1 and Giga 67 were used as the male parents.Some of the Fo seeds were radiated with 20KR of γ rays while some F1 were backcrossed to upland varieties Xin-Jiang big ball and Xing-Tai-6871 as the male parents in the next year.Plant selections were made subsequently from 1975 through 1980. Segregation or variation of characters occurred yearly in all the progenies.Selection was effective.Till 1980,plant type,leaf shape, boll shape and maturaty have turned consistent within plot gradually, but some other economic characters remain varying to some extent. A large number of the selctions the fiber properties of their sea-island parents while their yield component somewhat restored as those of their upland parents.Thus,genetic advanceswere resulted for all of the main economic traits.In 1980,a lot of promising selections were examined among which the line"6020"was considered the best for it has the lint length of 37mm,fiber fineness 7170 m/g and fiber strength T1 31, 37 g/tex,while those of the control,Lou-Mian-1,were 30.6 mm,5600 m/g,and 20.4 g/tex resqectively.Yield componets of line"6020"were thus:number of fruits per plant 18.9,boll weight 5.6g and lint percentage 36.2%,while those of Lou-Mian-1 were 19.5,5.2g and 36.5% respectively. The reasons for longterm segregation or variation of characters were also discussed.
