摘要
为了确定光周期对作物影响的连续变化规律,采用大麦自交系为材料,通过大麦自交系从长日照到短日照和从短日照到长日照环境有规律地进行相互转移的试验方法,定量地研究了光周期对大麦自交系诱导的响应。结果表明:光周期对大麦生长发育的影响呈阶段性线性关系。据此将大麦花前期发育阶段划分为基本营养生长期(BVP)、光敏感期(PSP)和光敏感后期(PPP)。建立了光周期影响大麦发育的数学模型,计算出花前期各发育阶段的天数,然后根据大麦光温发育模拟模型确定模型参数:它们分别是f0(最短花前期)、θ1和θ2(光敏感期起始时间和光敏感期终止时间)、δ(光敏感系数);估出96个大麦品系(包括两个亲本)的发育模型参数。计算结果表明,96个大麦品系均受光周期的影响,不同的大麦品系感光性差异较大,最早的在出苗后9.78d就进入光敏感期,最迟的在播种后41.49d进入光敏感期;最快的9.2d通过光敏感期,最慢的光敏感期一直持续到抽穗前;不同的发育阶段光周期对大麦的影响也有明显的区别,表现为光敏感期强烈地受光周期的影响,而在基本营养生长期和光敏感后期的影响较小;并分析了大麦抽穗前各发育阶段的长短与感光性强弱的关系。
Reliable prediction of crop development in the field requires quantitative knowledge of relevant environmental factors. An important approach is to determine the duration when crops respond to photoperiod. The objective of this study was to investigate the continual regulation of effect of change in photoperiod on individual genotypes of a genetic population. The recombinant inbred line （RIL） population was used as experiment materials. The population consists of 94 RILs and the two parents, ‘ Apex＇ and ‘ Prisma＇. Initially, half of the pots for each recombinant inbred line were placed in long-day light （LD）, while another half in short-day （SD） light. Plants were mutually transferred from LD to SD and from SD to LD environments at regular intervals. The effects of photoperiod on the recombinant inbred line population in barley （Hordeum vulgate L. ） were quantified.
The results showed that the effect of photoperiod on barley development appeared linear relationship, and based on this, the time from sowing to flowering can be divided into three successive phases： a basic vegetative phase （BVP）, a photoperiod-sensitive phase （PSP） and a post-PSP phase （PPP）. Furthermore, a mathematic model assessing the effect of photoperiod on barley development was developed, and the lengths of each of three phases from sowing to flowering was then estimated. Based on an ecophysiological development model as a function of daily temperature and photoperiod, photoperiod sensitive parameter was calculated. These parameters were f0 （ the minimum number of days to flowering at the optimum temperature and photoperiod）, θ1 and θ2 （ the development stages for the start and the end of the photoperiod-sensitive phase, respectively）, and δ （ the photoperiod sensitivity）. The result showed 96 individuals （ including the two parents） of the recombinant inbred line population in barley were affected by photoperiod. But there was much difference between various recombinant inbred lines.
出处
《生态学报》
CAS
CSCD
北大核心
2007年第11期4412-4418,共7页
Acta Ecologica Sinica
基金
国家自然科学基金资助项目(30060036)~~
关键词
大麦
发育模型
光敏感参数
Barley
development model
photoperiod-sensitive parameter
