西藏野生芥菜型油菜构件种群相互关系及其与气候因素的灰色关联度分析

以生物构件理论为基础,运用灰色关联分析技术对西藏野生芥菜型油菜种群构件结构与环境因子的关系进行了研究。结果表明:1)每株角果数、每角果粒数和粒重是产量构成的重要指标,随着每株角果数、每角果粒数和粒重的增大,西藏野生芥菜型油菜的产量明显增加,它们之间的构件因子关联度较大;2)主茎系统是西藏野生芥菜型油菜植株的基础,其间的关联性显示了西藏野生芥菜型油菜植株构件组成的整合作用;3)一级分枝长度、一级分枝角果数、二级分枝数、一级分枝粗度之间有较大的关联度,但与一级分枝发生高度关联度相对较小;4)研究的7个环境因子与西藏野生芥菜型油菜种群的生长关系均较密切,且温度是影响西藏野生芥菜型油菜分布和生命活动相对重要的环境因子,而降水为次要因子。

Analysis of grey relatedness between the modular structure of wild Brassica juncea population in Tibet and the environmental flactors

The relationship between environmental factors and the modular structure of wild Brassiea juncea in Tibet was investigated. Results showed that 1): the numbers of plant silique , the numbers of seed of silique and the weight of seed are the important index representing the yield of wild B. juncea in Tibet, and the weight increasing followed the numbers of plant silique ,the numbers of seed of silique and the weight of seed. 2): the stem system was the foundation for the whole plant, while the first grade branch system is derived from the stem system .The relationship among these factors indicates the integration in the modular structure of wild B.juncea population. 3): a strong relationship among the length of first branch, the silique numbers in first branch, the numbers of second branch and the diameter of the first branch in the first grade branch system was observed, but weeker between the height of the first branch. 4): between the seven environmental factors investigated and the modules of the plant are higher relative ,which shows that the environmental factors strongly affect the growth and distribution of wild B. juncea population. Mean while the temperature is more important factor than the other factors, and the precipitation is an indirect environment factor for wild B. juncea population.