玉米自交系和杂交种的抗倒伏能力鉴定与比较

目的]鉴定和比较玉米自交系和杂交种的抗倒伏能力。方法]根据玉米自交系、杂交种茎杆抗拉弯强度,比较了107份自交系和13份杂交种的抗倒伏能力。结果]107个自交系中,有14个自交系抗拉弯强度值在4.0 kg以上。13个杂交种中,登海618、瑞普959、大丰30、大丰26、太玉339抗倒性表现较好,与生产实际相吻合。结论]抗拉弯强度值越高,抗倒伏能力越强。抗拉弯强度可作为玉米自交系、杂交种抗倒伏能力鉴定的依据之一。

Identification and Comparison of Lodging-resistance Capability of Maize Inbred Lines and Hybrids

Objective] To identify and comapre the lodging-resistance capability of maize inbred lines and hybrid cultivars.Method] According to the tensil strength of the stems of maize inbred lines and hybrids,we compared the lodging-resistance capability of 107 inbred lines and 13 hybrids.Result] Among the 107 maize inbred lines,lodging-resistance capabilities of 14 lines were above 4.0 kg.Among the 13 hybrids,Denghai 618,Ruipu 959,Dafeng 30,Dafeng 26 and Taiyu 339 showed relatively good lodging resistance,which was consistant with the practical production.Conclusion] Generally,the lodging resistance was positively correlated with the stem tensil strength.Stem tensil strength could be used as one of the standards for identification of lodging resistance of maize inbred lines and hybrids.