中文摘要：

2009和2010年研究了吉林省1923～2004年育成的22个主栽大豆品种在R2、R4、R6期大豆伤流液重量与地上器官生物量的变化及其关系。结果表明：不同育成年份品种的根系伤流液重量和地上部生物量品种间存在显著差异;根系伤流液重量与地上部各器官生物量均随着育成年代的推进而增加,且二者之间呈显著正相关,表明大豆品种的遗传改良使地上部分生物量增加的同时,也导致了根系活力的提高。大豆品种根系伤流液重量与地上部分生物量在R2、R4、R6 3个时期均呈正相关,其中R4时期达到显著水平,伤流液重量与茎、叶片生物量在R4期均呈显著正相关。地上部分生物量与根系伤流液重量的比值在各时期均无明显变化,表明大豆品种的遗传改良过程中地下根系与地上部分器官是协同演进的。

英文摘要：

We chose 22 popular soybean cultivars released from 1923 to 2004 in Jilin province and investigated the changes of root bleeding sap weight（RBSW） and biomass of above-ground organs（BAGO）during flowering（R2）,pod setting（R4） and seed filling（R6） in 2009 and 2010.RBSW and BAGO varied significantly with varieties and both showed increasing trend with released years.A significant positive relationship between RBSW and BAGO was found,suggesting the genetic improvement of soybean cultivars increased the biomass of above-ground organs,at the same time,improved root activities.RBSW at R2,R4 and R6 positively correlated with BAGO,and reached significant level at R4.In addition,RBSW also significant positively correlated with biomass of leaf and stem at R4.The ratio of above-ground biomass to RBSW had no significant changes at different growth stages,suggesting that root and above-ground parts had coordinate evolution trend in genetic improvement of soybean cultivars.