【作者】 赵松义； 高春阳； 胡日生； 朱列书；

【Author】 ZHAO Song-yi GAO Chun-yang HE Ri-sheng ZHU Lie-shu (Central-South Agricultural Experiment Station,CNTC,Changsha 410128,China)

【机构】 中国烟草中南农业试验站；

【摘要】 以自育的3个烤烟胞质不育系和4个国内推广烤烟品种为材料,配成3×4=12个杂种,研究烤烟8 个农艺性状的杂种优势表现．结果表明：(1)正向离中优势最多的是单叶重,100％组合的正向离中优势达显著或极显著水平；相反,叶数没有一个组合具有显著的离中优势,株高、叶长和节距均有33．33％组合离中优势达到显著或极显著水平,其它农艺性状具有8．33％～25．00％组合的离中优势达显著或极显著水平；(2)农艺性状平均有16．67％组合存在显著或极显著的超高亲优势,较多的为单叶重,有75．00％组合的超高亲优势达到显著或极显著水平,叶数和叶长宽比均无显著的超高亲优势,其他农艺性状有8．33％～16．67％组合的超高亲优势达到显著或极显著水平；(3)各农艺性状中,仅叶长宽比有8．33％的组合存在显著或极显著的超低亲优势,其他性状均无显著或极显著的超低亲优势．更多还原

【Abstract】 Twelve hybrid crosses between 3 cytoplasmic male sterile lines and 4 varieties of flue-cured tobacco popular in China were used to determine the heterosis in the following agronomic characters:stem height,leaf quantity,leaf length,leaf width,length/width of leaf,stem girth,pitch and weight of single leaf.Results were as follows:(1) stem height,leaf quantity,leaf length,leaf width,stem girth,pitch and weight of single leaf of tobacco of the hybrids were over both parental means in the average performance,and length/width of leaf equal to parents.(2)beterosis from mid-parent value was founed in most crosses,and weight of single leaf in 100.00% crosses were significantly different at 0.05 or 0.01 levels,so were the other economic characters in 8.33%～25.00% crosse;(3)heterosis over higher parent was founded in 16.67% crosses on average,and weight of single leaf in 75.00% crosses were significantly defferent at 0.05 or 0.01 levels,so were the other agricultural characters in 8.33%～16.67% crosse;(4)no crosse heterosis below lower-parent for the agronomic traits,except length/width of leaf in 8.33% crosses,was significantly different at 0.05 or 0.01 levels.更多还原