【摘要】 中棉所12即中棉12(原名381)(G.hirsutum L.),是以乌干达4号为母本与邢台6871杂交,选其优系干枯、黄萎病圃和病钵中连续定向选择多系混合而成。该品种具有光合生产力高、高产稳产、品质较好、早熟不早衰、适应性广、兼抗枯黄萎病、烂铃少等特性。籾步把高产、优质、抗病三性状有机结合起来,使其协调发展。1985-1986年经黄河、长江流域国家棉花抗病品种区域试验,霜前皮棉分别较对照品种增产17.5%和11.%,1987年起被选为国家棉花抗病区试对照品种,皮棉产量连续4年居首位。1989年种植1257万亩,累计推广2668万亩。更多还原

【Abstract】 Zhongmian 12 (Zhongmiansuo 12——Original name No. 381) (G. hirsutum L. ) is derived from a cross between Uganda 4 (female parent) and Xingtai 6871.Selected lines were grown in fusarium and verticillium wilt infected nursery beds and pols,with continual and directional selections made among multiple lines. The resultant variety is Zhongmian12,characterized by resistance to both fusarium and verticillium wilts, high consistent yield, good fiber quality, earliness without precocious degeneration, wide adaptability, less boll rot, and high photosynthetic productivity. Primarily, it is a concerted combination of wilt resistance, high yield and good fiber quality. In 1985-1986, it joined the national wilt resistant cotton variety tests in the Yellow River and Yangtze River valleys. Its prefrost lint yields were17.5% and 11.5%more than those of the controls, respectively. In 1987, it was designated as the standard control in national wilt resistant cotton variety tests, in which its lint yield ranked first over four successive years. The area under such a variety in 1989 was 12.57 million mu, with a cumulative total area of 26.68 million mu.更多还原