摘要
以9个抗倒性不同的高产甘蓝型油菜组合为材料,在2个生态环境差异较大的试点进行种植,分析了株型结构与倒伏指数之间的关系,结果表明:根茎粗和一次分枝数与倒伏指数呈极显著和显著负相关,一次分枝长与倒伏指数呈显著正相关,可将根茎粗、一次分枝数和一次分枝长作为油菜抗倒伏性状的主要指标;(分枝层+主花序)(即结角层)/分枝高度(非结角层)、分枝层/分枝高度、主花序/分枝高度与倒伏指数呈极显著或显著正相关,鲜根冠比和结角层/非结角层越大,植株的倒伏指数越大,越不抗倒,即合理的株型结构可增强植株的抗倒性;各产量性状均与倒伏指数呈显著或极显著负相关,说明植株倒伏越严重产量越低。主花序产量比例小,侧枝产量比例大,植株的抗倒性越强。
The relationships between lodging resistance and plant architecture of 9 high-yielding hybrid rapeseed combinations with different lodging resistances were studied in two different ecological environments. The main results were obtained as follows ： （ 1 ） Thickness of rhizome （TR） and number of primary branches （NPB） were significantly or very significantly negatively correlated with lodging index （ LI）, and length of primary branch （LPB） was significantly positively correlated with LI, so TR, NPB and LPB could be used as the main parameters to evaluate the lodging resistance of rapeseed; （2） LI had a highly significant or significant positive correlation with [ length of branch-layer stem （LBLS） ＋ length of main inflorescence （LMI） ]/branch -beginning height （BBH） , LBLS/BBH and LMI/BBH, and LI increased with the increase in fresh root-fresh shoot ratio, which suggested that the reasonable plant architecture could strengthen the lodging resistance of rapeseed plants ; （ 3 ） All yield traits had a significant or very significant negative correlation with LI, showing that yield decreased with the decrease in lodging resistance. The lower yield ratio of main inflorescence and the higher one of branches were, the stronger lodging resistance of plants was.
出处
《江西农业学报》
CAS
2016年第9期9-13,共5页
Acta Agriculturae Jiangxi
基金
陕西省科技统筹创新工程计划项目(2015KTCQ02-20)
关键词
甘蓝型油菜
倒伏指数
株型
相关分析
Brassica napus
Lodging index
Plant architecture
Correlation analysis
