论文部分内容阅读
为探索不同年代大豆品种根系活力的变化及其与植株各器官生物量和根系伤流液重量的关系。以吉林省1923~2009年间育成的27个大豆品种为材料进行田间试验,在四叶期(V4),盛花期(R2),结荚盛期(R4)和鼓粒盛期(R6)测定根系活力、伤流液重量和植株各器官生物量。结果表明,随生育期的推进,植株器官生物量不断增加,而根系活力和伤流液重量则呈单峰曲线变化,在R4期达到最大。在R4期,植株根系活力、根系伤流液重量和器官生物量与育成年代均呈显著或极显著正相关,但在V4、R2和R6期均未达到显著水平。在R4期,根系活力与根系伤流液重量、植物器官茎、叶和根生物量呈显著或极显著正相关;各品种间地上部器官生物量与根系活力的比值差异不显著。大豆的遗传改良使地上部器官与根系活力协同演进,在根系活力增强的同时植株器官生物量和根系伤流液重量也增加,且在R4期,根系活力与植物器官生物量和根系伤流液重量相关最为密切;可以把R4期的根系活力作为高产育种的指标之一。
In order to explore the changes of root activity of soybean varieties in different ages and its relationship with the biomass of various organs and the fluid weight of root wounds. A total of 27 soybean cultivars cultivated in Jilin Province from 1923 to 2009 were used as materials to determine root systems at the four-leaf stage (V4), full flowering stage (R2), pod setting duration (R4) and drum weight Vitality, wound fluid weight and plant organ biomass. The results showed that with the advancing of the growth period, the biomass of plant organs increased continuously, while the root vigor and weight of wound fluid showed a single peak curve, reaching the maximum in R4. There was a significant or very significant positive correlation between plant root activity, root traumatic fluid weight, and organ biomass in breeding stage R4, but not in stages V4, R2 and R6. There was a significant or very significant positive correlation between root activity and root traumatic fluid weight, plant stems, leaves, and root biomass at R4. There was no significant difference in the ratio of aboveground biomass to root activity among all cultivars. The genetic improvement of soybean resulted in synergistic evolution of shoot organs and root activity, increased plant root biomass and root traumatic fluid weight at the same time with increased root activity, and at R4, root vigor and plant organ biomass and root trauma fluid The most closely related to weight; root activity of R4 can be used as one of the indicators of high-yielding breeding.