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近些年来,我所先后育成的陕棉4号、陕棉5号、65—142、陕401、陕棉8号(416)、陕棉9号(112)、陕棉9号(717)等品种分别在陕西、河南、山东、江苏、河北、四川、云南等省的枯萎病重病区推广,面积逾百万亩。我们在选育棉花抗病新品种过程中,在抗病亲本的创造与组合选配方面,有如下几点体会。一、抗病亲本的创造国外早期的抗病品种,都存在着晚熟、低产、品质差的缺点,不能在生产上应用,以致受到淘汰。另一方面,一些丰产优质的良种,由于抗病性差,在病区种植不能收到稳产保质的效果,走了常规选种与抗病选种相割裂的弯路。
In recent years, Shaanxi Cottonfield No. 4, Shaanxi Cotton No. 5, 65-142, Shaanxi No. 401, Shaanxi Cotton No. 8 (416), Shaanxi Cotton No. 9 (112), Shaanxi Cotton No. 9 (717) The varieties were popularized in the wilt wilt areas of Shaanxi, Henan, Shandong, Jiangsu, Hebei, Sichuan and Yunnan provinces, respectively, covering an area of over 1 million mu. We are in the process of breeding new varieties of cotton disease resistance, in the creation of parent-child resistance and portfolio selection, the following experience. First, the creation of disease-resistant parents Early foreign disease-resistant varieties, there is the late maturity, low yield, poor quality shortcomings, can not be applied in production, resulting in being eliminated. On the other hand, due to poor disease resistance, some high yielding and good quality elite seeds can not receive stable and long-term quality results when they are planted in the ward and take the detours of conventional breeding and disease-resistant selection.