抗倒伏甘蓝型油菜茎秆强度分析与应用研究OA

Using the lodging resistant rapeseed ZS11 and short-growth-duration rapeseed germplasm with weak lodging resistance as materials,this study investigated differences in lodging degree and stem strength-related traits among different materials and analyzed the possible reasons for the formation of high stem strength.The results showed that there were significant differences in the lodging degree among 22 core germplasm materials with short-growth-duration.Among them,18XS172 had the lowest lodging degree and the best lodging resistance,but it was still significantly lower than ZS11.The stem puncture strength and stem cellulose content of 18XS172 were significantly lower than those of ZS11 from the final flowering stage onward.Compared with 18XS172,the cellulose content of ZS11 increased continuously from the budding stage to the final flowering stage,reaching a peak at the final flowering stage with a significantly higher accumulation rate.These results suggest that ZS11 has a rapid and prolonged period of cellulose accumulation,which may be the primary reason for its superior stem strength and lodging resistance.Furthermore,two excellent germplasm materials,24TS624-3 and 24TS496-3,were developed and identified.These materials combine a short growth duration,high stem strength,and high oil content.They can be directly used as parental materials in breeding programs aimed at improving lodging resistance in short-growth-duration rapeseed.