西藏野生油菜种群间角果趋同生长格局研究

西藏地处我国西南边陲,素有"世界屋脊"和"地球第三极"之称。由于地质史独特,地形地貌复杂,气候带全,土壤类型繁多,野生植被多样,凡此种种,西藏油菜生境具有全球最典型的立体生境特色,其生态环境千差万别,堪称全球之最,独特而复杂的油菜生境,产生了丰富多样的野生白菜型油菜(Brassica Campestris)和野生芥菜型油菜(Brassica juncea)遗传资源。本文根据植物种群的构件理论,采用大样本取样方法,对西藏野生白菜型油菜和野生芥菜型油菜分枝进行了角果种群统计的生长分析。结果表明,西藏野生白菜型油菜和野生芥菜型油菜一级分枝的角果数、角果生物量、角果生物量比例均呈现Peel-Reed模型变化规律,角果宽度与角果长度之间的生长关系均呈现Yield Density模型变化规律,显示出角果种群形成与生长过程的趋同生长格局与物质分配策略。

Study on convergent growth pattern of silique for wild rapeseeds population in Tibet

With a unique geological history, complex land surface, climatic zones, various soil types, and different wild vegetations etc, Tibet is a typical area of vertical agricultural ecosystem. This unique and complex growing environment leads Tibetan wild rapeseeds have high genetic diversity. According to plant population modular theory and using large sampling, silique population statistical growth analysis was carried out on the branches of wild Brassica campestris and B.juncea in Tibet. The results showed that for both species the silique population of wild rapeseeds showed the same power function regulation of growth and change including convergent development and growth processes, convergent biomass growth patterns, convergent growth modulation and biomass allocation strategies, and convergent silique growth processes.