摘要
对20世纪50年代以来中国自育的110个棉花抗枯、黄萎病品种的抗病性、产量性状、早熟性状的遗传改良进行了分析.结果显示,抗枯萎病育种成效显著,品种对枯萎病抗性呈稳步上升趋势;品种对黄萎病抗性亦呈上升趋势,但进展缓慢.除20世纪70年代品种略有下降外,品种的单株生产力呈上升趋势.单株结铃平均数在年代间变化不大,衣分变化趋势呈'V'字型,90年代品种最高.20世纪50～90年代,品种生育期缩短,早熟性增强.株高、第一果枝距子叶距离、第一果枝节位变化趋势一致,呈下降趋势.
Genetic improvement of main traits was analyzed using 110 China-bred cottons with Fusarium and Verticillium wilts resistance released since 1950's.The results indicated that a great progress for Fususium wilt resistance breeding had been achieved, but progress for Verticillium wilt resistance breeding was slow. Yield of per plant showed an up trend except for 1970's varieties. The mean of boll number per plant was no significant variation among different years. Lint percentage of the varieties showed a downtrend from 1950's to 1970's and an up trend from 1970's to 1990's. Growing period of the varieties became short from 1950's to 1990's, and there was a down trend of plant height, first fruit branch node, distance between the first fruit branch and cotyledon from 1960's to 1990's.
出处
《中国农学通报》
CSCD
2005年第3期264-267,共4页
Chinese Agricultural Science Bulletin
基金
河北省自然科学基金项目(301167
C2004000365)资助。
