论文部分内容阅读
在发病严重而均匀的田间病圃中，对棉花８个亲本（４抗十４感）和２８个Ｆ＿１代进行了抗枯萎病鉴定。结果表明：杂种抗性与亲本抗性呈极显著正相关，４个抗病品种的抗性为中棉１２＞苏棉３号＞鄂６２－１＞鄂抗棉１号，但苏棉３号的抗性传递能力高于中棉１２。抗病×感病组合Ｆ１抗性为部分显性，发病率、病指和病级偏向抗病亲本，中亲优势率分别为－２８．５％，－３３．３％和－４７．０％。抗×感、高抗×感组合一般为中抗，中抗×感组合一般为感病，抗性低的抗病品种×病指高的感病品种的组合Ｆ１也表现感病。抗×抗、抗×高抗、抗×中抗、中抗×高抗组合表现抗或高抗，甚至超双亲。而感×感组合仍表现为感病。发病率、病指和病级三者间呈极显著正相关，但病级更为客观，试验误差小，遗传变异系数大，易于检测到材料间差异，适宜于开展抗性遗传分析。
Fusarium wilts were identified in eight severely infected and susceptible field nurseries with 8 parents (4 resistant individuals) and 28 F1 progenies. The results showed that there was a significant positive correlation between hybrid resistance and parental resistance. The resistances of four resistant varieties were Zhongmian 12> Sumian 3> E 62-1> Emianmian 1, but Sumian 3 The resistance to transmission than cotton 12. The susceptibility to disease-resistant × susceptible combination F1 was partially dominant. The prevalence, disease index and disease-prone parents of the disease-resistant parents were -28.5%, -33.3% and -47.0% respectively, . Anti-× flu, high resistance × flu combination is generally medium resistance, resistance × flu combination is generally susceptible, low resistant varieties × susceptible varieties of high susceptibility varieties F1 also show flu. Anti-x, anti-x high resistance, anti-x middle resistance, resistance x high resistance combination of anti-or anti-high resistance, and even super parents. The sense of flu is still a combination of flu feeling. There was a significant positive correlation between morbidity, disease index and disease grade, but the disease grade was more objective, the test error was small, the coefficient of genetic variation was large, the difference between materials was easy to detect, and it was suitable for carrying out genetic analysis of resistance.