摘要： 以24个冬小麦品种（或品系）为试材，研究测定了冬小麦对莠去津反应的敏感性。结果表明，在苗前土壤喷3000mL/hm²莠去津的条件下，出苗后30d有6个品种表现不敏感（T），7个品种表现中感（MS），4个品种表现中抗（MT）；小麦根部受莠去津的为害重于地上部。观察了不同反应型小麦品种之间杂种F1、F2 和BC1的敏感和不敏感植株分离比例，小麦对莠去津反应受细胞核基因控制，与细胞质基因无关。该基因属单基因遗传，敏感性为隐性，不敏感性为显性。研究了莠去津对小麦幼胚培养的影响，低浓度莠去津对小麦幼胚愈伤组织诱导率没有明显影响，高浓度莠去津降低了愈伤组织的诱导率。无论培养基中的浓度高低，莠去津对继代培养中愈伤组织的生长状态都有影响。

关键词: 冬小麦, 除草剂, 莠去津, 敏感性, 遗传

Abstract: The sensitivity to a trazine was observed in 24 wheat varieties lines with the concentration of 3000 mL/ha 40% atrazine solution. The varieties showed different responses to the application of atrazine . Some of them were of tolerance with most plants growing normally and/or slightly injured. Others were susceptible to atrazine, most of the plants were severely injured and even died. The remaining varieties were classified to medium susceptible or medium tolerant. Investigation indicated that the roots of wheat were more severely damaged than the top parts. Response to atrazine, which had not relation with cytoplasm, was controlled by a single nuclear gene, as revealed by segregation ratios of the susceptible plants to the tolerant ones in F1, F2 and BC1 hybrids between different response varieties. The sensitivity was recessive, whereas the tolerance, dominant. The effects of atrazine on immature embryo culture were also noticed. High concentration (100 mg/L) of atrazine that added to the media reduced the callus induction, yet low concentration (25mg/L) did not substantially influence the callus induction in the present study. Atrazine had some effects on callus developing state during subculture regardless its concentrations in media.

Key words: Triticum aestivum, Herbicide, Atrazine, Sensitivity, Inheritance